Got a question never used a sub dude but would it work with a pair of large tower speakers, a friend has a pair of The speaker company towers with 2 8" woofer sitting on hardwood floor and it vibrates quite a bit even with rubber feet attached.

I was thinking about doing that same thing(even though Im on carpet with spikes). I would imagine that the subdude would be great with towers.

i just ordered a pb13-ultra and its going to be on a solid poured concrete floor. no carpet no wood nothin. would a gramma/subdude be necessary? i cant quite tell from the comments so far.

i just ordered a pb13-ultra and its going to be on a solid poured concrete floor. no carpet no wood nothin. would a gramma/subdude be necessary? i cant quite tell from the comments so far.

Only person to be able to tell that would be you. Try out the sub where you want it and see how it sounds. If you think it could benefit from being off the floor get a gramma. Honestly, if you didnt like the gramma Im sure you could sell it in a heartbeat. Id probably buy it off you.

i just ordered a pb13-ultra and its going to be on a solid poured concrete floor. no carpet no wood nothin. would a gramma/subdude be necessary? i cant quite tell from the comments so far.Doubtful. The SubDudes are most effective in preventing sub vibrations from being transferred to flexible/resonant floor boards. With concrete, all you need is a firm footing.

Doubtful. The SubDudes are most effective in preventing sub vibrations from being transferred to flexible/resonant floor boards. With concrete, all you need is a firm footing.

perfect... that was my guess but i wanted to be sure. im making sure that beast is ready to go when it gets here in 4 days. :D

I just got a gramma and it works great but its bigger then I need. I was looking at the subdude but theres also a subdude HD(home design) which cost $10 more. Do I need the HD one or is the regular subdude fine

I just got a gramma and it works great but its bigger then I need. I was looking at the subdude but theres also a subdude HD(home design) which cost $10 more. Do I need the HD one or is the regular subdude fine

They function the same. The HD has a washable cover.

Well, after reading this whole thread I purchased a Great Gramma from Amazon today. Should get here by Thursday.

I'm not even going to mention it to my wife, I'll just put it under the sub and see if she notices anything different the next time we watch a movie in the HT.

Question though: I'm thinking about adding a stage to the front of my HT room. Since my HT is on the second floor, I won't be filling the stage with sand. If I filled the stage with insulation and placed the subwoofer w/Great Gramma on top of the stage, would that be sufficient? Different than a sand filled stage?

Would SubDude make any difference on a tiled floor?

Would SubDude make any difference on a tiled floor?Probably. Anything helps a tiled floor. :rolleyes:

OK, got an older JBL PB12 (I know, I know, crap sub but I had it as an extra so it's pulling #2 sub duties in a 2-sub system) which is downfiring into carpet which most likely has a cushion below it followed by a concrete slab. I know it's only a low-priced JBL, but the bass has always been rather boomy. Will the SubDude help tighten things up a tad? I'm not looking for a revelation, just some more tightness from a low cost tweak.

OK, got an older JBL PB12 (I know, I know, crap sub but I had it as an extra so it's pulling #2 sub duties in a 2-sub system) which is downfiring into carpet which most likely has a cushion below it followed by a concrete slab. I know it's only a low-priced JBL, but the bass has always been rather boomy. Will the SubDude help tighten things up a tad? I'm not looking for a revelation, just some more tightness from a low cost tweak.

I doubt it will help. SubDude will help with rattling windows and floors. It sounds like your problem requires bass traps or EQ (or both).

[QUOTE=union1411;14460402]Subdude didn't do much for my sub. Green is with Subdude, red without. Sub is SVS PB10. i have a rug that covers most of my room and i'm on the 5th floor of a 1920s walkup; so maybe it's concrete floor, i dunno.

http://img49.imageshack.us/img49/8964/aurdn1.jpg (http://imageshack.us)

The graph above is from a post on page 13 of this thread. What do you all make of the crazy squiggliness off to the far right (above 100Hz)? I find this interesting because auralex's literature says that:

Subwoofers create big vibrations (low frequencies) that you can feel in the floor and in objects placed nearby. When the source of the vibrations is coupled directly to the floor it causes these objects to vibrate or resonate – not only at the fundamental pitch the source is creating but also at harmonic frequencies that discolor the true sound from the source. Now you have two (or more) objects vibrating, which creates an acoustical problem called “secondary resonance”.

Note the graph [included below] of SubDude performance on a sample concrete floor, the most noticeable effect is on harmonic frequencies above 100 Hz. This is the harmonic range above the fundamental the sub is recreating, allowing you to hear a more true bass tone below 100 Hz by eliminating upper harmonic resonances. This translates to the listener as more accuracy in the low end, and a cleaner (less muddy) crossover between the sub and your full range LCR channels. The SubDude effectively reduces secondary resonance by decoupling your subwoofer from the floor so you hear your sub and not the vibration of the other objects in your listening environment.

Note also the test was performed on a concrete floor, although repeatedly in this thread it is stated that there would be little to no difference when used on concrete.

Then again, it seems from the chart above there is little to no difference anyway, except maybe on the far right. FWIW, Auralex has this (so small it's difficult to see) chart:

http://www.auralex.com/sound_isolation_subdude/SubDude_STL.jpg

Hksvr used Hard foam from an arts and craft store "Micheal's." 2.5" high by 7" long. I can't afford fifty more dollars on the gramma for my Sentinel so maybe the hard foam idea would work for me on my carpeted wood floor in my living room. Good idea or would the gramma be better? my soon to be here sub on Friday is 85 pounds.

Just ordered the Subdude HD from Sweetwater (long time customer there).

I'm excited to no longer have rattling picture frames throughout the house (that one is for my wife) and tighter bass (for me)!

Hksvr used Hard foam from an arts and craft store "Micheal's." 2.5" high by 7" long. I can't afford fifty more dollars on the gramma for my Sentinel so maybe the hard foam idea would work for me on my carpeted wood floor in my living room. Good idea or would the gramma be better? my soon to be here sub on Friday is 85 pounds.

Auralex does sell "Platfoam" (http://www.auralex.com/sound_isolation_platfoam/sound_isolation_platfoam.asp), so it seems like there must be some DIY alternative. I'm not sure about the results though. Spend $10 for foam that doesn't work, then another $15, rinse and repeat...

i doubt it will help. Subdude will help with rattling windows and floors. It sounds like your problem requires bass traps or eq (or both).

+1

[QUOTE=union1411;14460402]Subdude didn't do much for my sub. Green is with Subdude, red without. Sub is SVS PB10. i have a rug that covers most of my room and i'm on the 5th floor of a 1920s walkup; so maybe it's concrete floor, i dunno.

http://img49.imageshack.us/img49/8964/aurdn1.jpg (http://imageshack.us)

The graph above is from a post on page 13 of this thread. What do you all make of the crazy squiggliness off to the far right (above 100Hz)? I find this interesting because auralex's literature says that:

Subwoofers create big vibrations (low frequencies) that you can feel in the floor and in objects placed nearby. When the source of the vibrations is coupled directly to the floor it causes these objects to vibrate or resonate – not only at the fundamental pitch the source is creating but also at harmonic frequencies that discolor the true sound from the source. Now you have two (or more) objects vibrating, which creates an acoustical problem called “secondary resonance”.

Note the graph [included below] of SubDude performance on a sample concrete floor, the most noticeable effect is on harmonic frequencies above 100 Hz. This is the harmonic range above the fundamental the sub is recreating, allowing you to hear a more true bass tone below 100 Hz by eliminating upper harmonic resonances. This translates to the listener as more accuracy in the low end, and a cleaner (less muddy) crossover between the sub and your full range LCR channels. The SubDude effectively reduces secondary resonance by decoupling your subwoofer from the floor so you hear your sub and not the vibration of the other objects in your listening environment.

Note also the test was performed on a concrete floor, although repeatedly in this thread it is stated that there would be little to no difference when used on concrete.

Then again, it seems from the chart above there is little to no difference anyway, except maybe on the far right. FWIW, Auralex has this (so small it's difficult to see) chart:

http://www.auralex.com/sound_isolation_subdude/SubDude_STL.jpg

PoshFrosh.. am I reading this right, you have the SVS PB10 and the F12?

[QUOTE=PoshFrosh;16418131]

PoshFrosh.. am I reading this right, you have the SVS PB10 and the F12?

Oh heck no. I wish! I only own the F12. I dream about the SVS.

I was just talking about this graph and the crazy squiggles above 100Hz and auralex's claim that the subdude somehow targets those sounds.

I'm not used to reading these types of graphs, so excuse me if I'm being silly.

Also, sorry if I implied that I could give some sort of direct comparison betwen the F12 and the SVS.

Hksvr used Hard foam from an arts and craft store "Micheal's." 2.5" high by 7" long. I can't afford fifty more dollars on the gramma for my Sentinel so maybe the hard foam idea would work for me on my carpeted wood floor in my living room. Good idea or would the gramma be better? my soon to be here sub on Friday is 85 pounds.

My advice is to use the Sentinel as is until you can afford the subdude. $50 isn't that much when you figure that's final cost.

If you start trying to DIY something unless you have everything already on hand and make it look 1/2 way decent, $10 here, $5 there and another $5 because I forgot to get something on my last trip, whoops I need something else $4, gas to go back and forth to get materials, time invested and don't forget tax, well you get the point, imo not worth it. Your Sentinel will be fine until you can get one.

BTW the Sentinel is leading my short list. I'm ordering in a week or so and I'd love to hear your impressions. Nothing much on it so far as far as user feedback.

I have an SVS SB12-Pus on a carpeted wood joist floor. I don't have any rattling problems and my sub sounds pretty good to me.
What improvements would I most likely notice if I use a Subdude?

I have an SVS SB12-Pus on a carpeted wood joist floor. I don't have any rattling problems and my sub sounds pretty good to me.
What improvements would I most likely notice if I use a Subdude?

One thing my friends and I noticed when using the subdude with my submersive was bass placement in the air. What I mean by that is you could actually feel the bass coming at you from wherever it was supposed to be on the screen. If a gun was fired on the upper right side of the screen, you felt it coming in from that part of the room. If a bomb went off underground, you felt the bass in the floor migrating up the couch.

Without the subdude we didnt notice as much of a bass "dimension" so to speak if that makes sense.

One thing my friends and I noticed when using the subdude with my submersive was bass placement in the air. What I mean by that is you could actually feel the bass coming at you from wherever it was supposed to be on the screen. If a gun was fired on the upper right side of the screen, you felt it coming in from that part of the room. If a bomb went off underground, you felt the bass in the floor migrating up the couch.

Without the subdude we didnt notice as much of a bass "dimension" so to speak if that makes sense.

That *has* to be psychological. I don't believe there's any mechanism in science or physics that would make essentially non-directional low frequency vibrations all of a sudden become directional and radiate from different parts of the room just by elevating a subwoofer 3" and isolating it from the floor with foam. Especially not to place the vibrations as discretely as "from the upper right side of the screen".

Cheers,
The REAL Joe

I have an SVS SB12-Pus on a carpeted wood joist floor. I don't have any rattling problems and my sub sounds pretty good to me.
What improvements would I most likely notice if I use a Subdude?

Probably not much. The Subdude addresses a very specific problem that you do not have (vibration from the sub).

I agree..my Outlaw Ex does seem to perform better 'in the air' with the gramma..then again, it may be the beer.

I just received my Subdude from Sweetwater last week. I am very impressed. I have an old house built in 1922 with the original oak floors. My Velodyne CHT-12 used to rattle the room right up to the curtain rods. Subdude totally eliminated the rattles. Definitely not snake oil. Easily the best $50 I've ever spent on an accessory/tweak.

BTW- first time ordering from Sweetwater and they were outstanding.

well was very interested, looks awesome but wanted custom size

22x25" for ed a5-350

cost just under $20

did notice a difference, the wierd part was being able to turn the level up 2 notches, was great.....

3/4" mdf, fabric and foam foam from craft store. and some spray adhesive..

http://i44.photobucket.com/albums/f36/fluffyrunnells/sub004.jpg
http://i44.photobucket.com/albums/f36/fluffyrunnells/sub001.jpg

That might be the first time I've ever seen a center channel that was bigger than the TV.

whoops sorry


http://i44.photobucket.com/albums/f36/fluffyrunnells/023-Copy.jpg

Much better.


Now, darken those walls a couple of shades, finish the baseboards and put down some rugs.

why aren't these made in a few different sizes? the 15x15 won't work very well for my 14.5" x 22" sub. i know it would work, but i think it'll look funny.

i guess i could just make one like the guy a few posts up. i do have quite a bit of stuff that rattles and vibrates in my room and it would be nice to reduce or eliminate it.

Much better.


Now, darken those walls a couple of shades, finish the baseboards and put down some rugs.

ok now you sound like my wife...

i did this in 35min, base boards next weak. rugs, no way...cant stand em'

also have fence, and deck to do....:(

why aren't these made in a few different sizes?

I believe there's 3 sizes. The sub-dude, the gramma and the great gramma.

What about solid concrete blocks/pads stacked for height (multi layer), from say Home Depot. (Material wrapped for visual)

Would that slow down Sub vibrations more then a Subdude??

I believe there's 3 sizes. The sub-dude, the gramma and the great gramma.

ok, i'll have to look a little closer. i just saw the subdude and the subdude HD.

i kinda just made my own little ghetto subdude just to see if i can hear a difference. if so i'll either make it look nicer, or buy the real deal. i took some of the same type of foam that i had layin around and glued it to a piece of plywood and layed the sub on it. it cost me nothing and only took about 5 minutes to make and setup.

i'll report back once i get a chance to test it out.

EDIT: i just ran a sweep with REW from 10hz to 50hz and it seems like the rattling has been reduced but not eliminated. maybe i need more/thicker foam. the foam i found laying around is only about 1" tall.

why aren't these made in a few different sizes? the 15x15 won't work very well for my 14.5" x 22" sub. i know it would work, but i think it'll look funny.

i guess i could just make one like the guy a few posts up. i do have quite a bit of stuff that rattles and vibrates in my room and it would be nice to reduce or eliminate it.

They come in different sizes under different names. the Subdude being the smallest then the Gramma and the Great Gramma. I ordered the Subdude Sunday for the Sentinel just because I had a credit with Amazon and wanted to check it out. I checked the size of the other models and they seem to big. The Subdude is about the exact width of our subs and would only leave 2.5" on each end if centered and should be more than enough support. It'll give a floating on air look from the front. It should be here in a few days. I'll let you know how it works out.

The Gramma and Great Gramma are marketed to musicians. Other than the size and the looks, they are identical to the subdude. I got mine at Guitar Center.

They come in different sizes under different names. the Subdude being the smallest then the Gramma and the Great Gramma. I ordered the Subdude Sunday for the Sentinel just because I had a credit with Amazon and wanted to check it out. I checked the size of the other models and they seem to big. The Subdude is about the exact width of our subs and would only leave 2.5" on each end if centered and should be more than enough support. It'll give a floating on air look from the front. It should be here in a few days. I'll let you know how it works out.

i just think the floating in mid air look would look kinda funny. i'll check out the other sizes or just finish the one i started. i look forward to your results/impressions.

so i tried to make my own Subdude but i couldn't find an foam that was dense enough. i grabbed some foam for a few bucks at a local store that i thought may be dense enough but upon trying it, my 90 lb sub squished it like a pancake.

but today, i went to a store called Guitar Center in Albany, NY with my dad to look at some drum stuff (he's a drummer). while i was there, guess what i saw. an Auralex GRAMMA for $49.99! i grabbed one and put the sub on it. i haven't got a chance to play with it yet. i'll post my impressions once i get to test it. the Epik Sentinel fits on it very nicely. the GRAMMA is 23" x 15", and with the Sentinel being 21" x 14.5" it fits like a charm. i was shocked to see the GRAMMA in a retail store and even more shocked to see it there at this price. i had thought that this kind of stuff was an internet direct kinda thing. will post my thoughts later on...

Hey everyone. I custom ordered a subdude HD a couple weeks ago. Got it at the beginning of this week. It was custom made to match my DIY Maelstrom-X sub and is 26"x26". Currently I have my Bic H-100 on it until I get the driver in. Here's some pics.

http://i718.photobucket.com/albums/ww189/kylathwe/CIMG0973.jpg
http://i718.photobucket.com/albums/ww189/kylathwe/CIMG0974.jpg
http://i718.photobucket.com/albums/ww189/kylathwe/CIMG0975.jpg

sweet, didn't know you could order custom sizes. I bet that cost a pretty penny.

It wasn't too bad. I got a quote from a local company for like $380 plus shipping...ridiculous. Got a quote from Sweetwater and paid less than half that shipped.

It wasn't too bad. I got a quote from a local company for like $380 plus shipping...ridiculous. Got a quote from Sweetwater and paid less than half that shipped.

not bad at all. Two Subdude HD's would be $120 shipped, and then not the ideal size anyway.

My situation is I have an SVS pc12-nsd sub in my home theatre set-up. The room is upstairs (over the garage) and has pergo flooring over a standard particle board subfloor. The sub is producing wonderful, room-filling bass for both HT and music-listening experience. My issue is the 'booming' resonance that is heard (felt?) in the remainder of the house. I contacted SVS & explained the situation and asked their advice." As I suspected, according to Jack at SVS, ..."most of the bass is transferred via the actual sound and not through the physical vibrating of the floor by the sub....you can experiment with putting something under the sub to de-couple it a bit and see what it sounds like downstairs." Good, practical advice and so I've ordered the Auralex Subdude (15" x 15) and will give it a try & see if it has an impact on the 'noise' factor downstairs.
It'll be interesting to see if the subdude provides a difference. I'll report what I find.

I think you'll still hear it, but at least pictures won't keep falling off the wall and breaking the glass anymore ;), a big plus in my case :D.

My situation is I have an SVS pc12-nsd sub in my home theatre set-up. The room is upstairs (over the garage) and has pergo flooring over a standard particle board subfloor. The sub is producing wonderful, room-filling bass for both HT and music-listening experience. My issue is the 'booming' resonance that is heard (felt?) in the remainder of the house. I contacted SVS & explained the situation and asked their advice." As I suspected, according to Jack at SVS, ..."most of the bass is transferred via the actual sound and not through the physical vibrating of the floor by the sub....you can experiment with putting something under the sub to de-couple it a bit and see what it sounds like downstairs." Good, practical advice and so I've ordered the Auralex Subdude (15" x 15) and will give it a try & see if it has an impact on the 'noise' factor downstairs.
It'll be interesting to see if the subdude provides a difference. I'll report what I find.

I am using Subdude. Previously, it was meant for my Velodyne DSLR4000. It did minimise the boominess of my Velodyne. Bass is firmer. Then, I bought the SVS PC-12Plus. The Subdude is a little smaller (15" x 15") since the diameter of PC-12Plus is 16". A little protruding.

It does not isolate the bass as it is meant to isolate vibration. Sound still pass through and fills my home just like Audixim mentioned. Now, I am doing acoustice treatment to minimize it.

I am using Subdude...Then, I bought the SVS PC-12Plus. The Subdude is a little smaller (15" x 15") since the diameter of PC-12Plus is 16". A little protruding.

It does not isolate the bass as it is meant to isolate vibration. Sound still pass through and fills my home just like Audixim mentioned. Now, I am doing acoustice treatment to minimize it.
Yeah, I think part of the 'downstairs' effect may be due to some of the vibration of the wood floor radiating through the floor joists that span the house. I'm anxious to hear if it makes any improvement to the situation.

at construction sites where equipment creates structure-born vibration issues, they just place these pads under the machinery and it works great

http://www.acousticalsolutions.com/products/isolation/pads.asp?gclid=CN-r48vkjZsCFRZM5Qod9gmqpg

anyone care to comment on how it would compare to a subdude?

at construction sites where equipment creates structure-born vibration issues, they just place these pads under the machinery and it works great

http://www.acousticalsolutions.com/products/isolation/pads.asp?gclid=CN-r48vkjZsCFRZM5Qod9gmqpg

anyone care to comment on how it would compare to a subdude?

They are 1/4 and 3/8" thick, the foam supports on the subdude are around 2" thick an the rest of the area is covered with the same type foam. I'm sure they would have some effect but at around twice the price I'd stick with the subdude.

every sub needs a subdude.

anywhere you can find one for under $49?

anywhere you can find one for under $49?

i found the GRAMMA at a local Guitar Center for $50, i would assume the Subdude would be less than $50 there since the bigger GRAMMA is $50 there.

i found the GRAMMA at a local Guitar Center for $50, i would assume the Subdude would be less than $50 there since the bigger GRAMMA is $50 there.

Whats the difference between the Gramma and the Subdude?

Whats the difference between the Gramma and the Subdude?

the GRAMMA is just a bigger size. the Subdude is 15x15. the GRAMMA is 23x15.

my sub is 21x14.5, so i went with the GRAMMA. awesome product, really tightened things up, and lessened most of the rattles in my room.

the GRAMMA is just a bigger size. the Subdude is 15x15. the GRAMMA is 23x15.

my sub is 21x14.5, so i went with the GRAMMA. awesome product, really tightened things up, and lessened most of the rattles in my room.

Thanks Jason....I think im going to pick up the Gramma..Looks like a perfect size for the Sentinel...I have it on a hardwood floor and the whole house is shaking :)

Thanks Jason....I think im going to pick up the Gramma..Looks like a perfect size for the Sentinel...I have it on a hardwood floor and the whole house is shaking :)

yup, perfect fit. i'd rather have the mat underneath be bigger instead of having the sub look like it's floating in mid air like the Subdude would do.

http://i111.photobucket.com/albums/n159/cavalier94sq/IMG_4337.jpg

http://i111.photobucket.com/albums/n159/cavalier94sq/IMG_4338.jpg

the GRAMMA is just a bigger size. the Subdude is 15x15. the GRAMMA is 23x15.

my sub is 21x14.5, so i went with the GRAMMA. awesome product, really tightened things up, and lessened most of the rattles in my room.


I agree GRAMMA is bigger and you might have two for big subwoofers :)

I agree GRAMMA is bigger and you might have two for big subwoofers :)

Or you could use the Great GRAMMA, which is what I did.

Or you could use the Great GRAMMA, which is what I did.

Yes if it fits under subwoofer, but one Great GRAMMA wont be enough for 36x24x36 (HxWxD) subwoofer and two GRAMMAS are :).

The lack of deals to be found on the Subdude is irritating me. I can't find it any cheaper than the GRAMMA. Somebody needs to produce these for less than $50.

The lack of deals to be found on the Subdude is irritating me. I can't find it any cheaper than the GRAMMA. Somebody needs to produce these for less than $50.

why? :confused:

why? :confused:

First, the GRAMMA also costs $50, but it's bigger. The smaller size should be cheaper.

Second, I doubt it costs more than $20 to manufacture.

Third, I'm cheap.

First, the GRAMMA also costs $50, but it's bigger. The smaller size should be cheaper.

Second, I doubt it costs more than $20 to manufacture.

Third, I'm cheap.

to me the GRAMMA was well worth the $50 i paid. retail on the GRAMMA is supposed to be $60.

First, the GRAMMA also costs $50, but it's bigger. The smaller size should be cheaper.

Second, I doubt it costs more than $20 to manufacture.

Third, I'm cheap.

Both the Subdude and Gramma have been the same price for as long as I've been in the game which as been several years and the price hasn't changed, which can't be said about many items. Personally I think it's a completely fair price considering the cost of running a business. By the time one paid for the materials to construct one, gas, tax and other expenses I'd venture to say you'd be right at $50 not to mention time involved and they don't use ordinary foam. It's very VERY dense stuff. Most foams would cave under the weight of my 85lb sub but doesn't budge with the sub dude.

If you want to try and construct one by all means go for it but I doubt you'd beat the price by much if at all and maybe come out worse by the time you added everything up and probably not get the exact same quality material used in the process plus the time involved, whatever that's worth to you vs one click ordering.

to me the GRAMMA was well worth the $50 i paid. retail on the GRAMMA is supposed to be $60.

I went to a guitar shop yesterday that had the GRAMMA with a ticket saying "Reduced Price $49.99 regularly 59.99". But when I spoke with an employee he said in slightly different words that that's just marketing, they've always sold them for $50. He said he could order in a Subdude, but it would also be $50.

Both the Subdude and Gramma have been the same price for as long as I've been in the game which as been several years and the price hasn't changed, which can't be said about many items.

I'm not one to say that the something is right just because that's how it's always been.

Personally I think it's a completely fair price considering the cost of running a business. By the time one paid for the materials to construct one, gas, tax and other expenses I'd venture to say you'd be right at $50 not to mention time involved and they don't use ordinary foam. It's very VERY dense stuff. Most foams would cave under the weight of my 85lb sub but doesn't budge with the sub dude.

All of the overhead you mention would be the same for both. But the GRAMMA uses more materials, meaning it costs more to manufacture. If the GRAMMA can be sold profitably for $50, it only makes sense that its little brother could be sold profitably for less.

If you want to try and construct one by all means go for it but I doubt you'd beat the price by much if at all and maybe come out worse by the time you added everything up and probably not get the exact same quality material used in the process plus the time involved, whatever that's worth to you vs one click ordering.

I don't have nearly the resources available that Auralex has at their disposal. I'm sure I could not personally construct one for less. But there has to be another company that makes room treatment materials like Auralex that could offer some competition.

All of the overhead you mention would be the same for both. But the GRAMMA uses more materials, meaning it costs more to manufacture. If the GRAMMA can be sold profitably for $50, it only makes sense that its little brother could be sold profitably for less.


On the other hand for all I know they might start with the same exact materials just having less waste for the GRAMMA.

just buy one... it's worth it. so many people have stated that to them it was worth the 50 bucks, but if you don't feel that it is, then oh well.

I don't have nearly the resources available that Auralex has at their disposal. I'm sure I could not personally construct one for less. But there has to be another company that makes room treatment materials like Auralex that could offer some competition.

FYI, Auralex is the budget provider. Other than people selling packing foam and calling it acoustic foam, they are the low cost provider for this kind of thing.

Most of the cost of a product like this at this price point is from the overhead factors mentioned. The difference in materials cost between the two sizes is probably a $1 or so.

FYI, Auralex is the budget provider. Other than people selling packing foam and calling it acoustic foam, they are the low cost provider for this kind of thing.

Most of the cost of a product like this at this price point is from the overhead factors mentioned. The difference in materials cost between the two sizes is probably a $1 or so.

that's probably true. think about what material there is. MDF, foam, the fabric that covers the mdf, and a little glue. the GRAMMA is only 8" bigger. how much more can that little extra really cost.

i need 8x @ diff sizes.. custom sizes ?

400+$ ? :eek:

Just ordered one from Sweetwater about 10 minutes ago and just got a call from them making sure my address and everything is correct so that the order goes perfectly. Was not expecting that but *very* happy that they did. In all my years of ordering online, never had that happen.

Can't wait to get it!

Just ordered one from Sweetwater about 10 minutes ago and just got a call from them making sure my address and everything is correct so that the order goes perfectly. Was not expecting that but *very* happy that they did. In all my years of ordering online, never had that happen.

Can't wait to get it!

Really? Sounds more like they were suspicious of fraud.

Snake oil if you ask me....

Anyone have FR charts with and without this device?

Well its not snake oil I can tell you that. Big Daddy over at the blu ray forums knows what he is talking about when it comes to bass.

http://forum.blu-ray.com/showthread.php?t=103410

He has plenty of charts to show the improvements. But the biggest thing people forget is placement is soooo huge that even a subdude wont fix horrible placement.

Snake oil if you ask me....

Anyone have FR charts with and without this device?

Is this (http://www.avsforum.com/avs-vb/showpost.php?p=14766736&postcount=408) what you are looking for?

Snake oil if you ask me....

Anyone have FR charts with and without this device?

not snake oil my friend. i noticed quite a difference when i put a GRAMMA under my Epik Sentinel. it sounded noticeably tighter, and reduced a lot of vibrations and rattles in my room.

I went with the SubdudeHD because of the color. The product ended all window rattles, therefore it accomplished exactly what I paid for.

Just ordered one from Sweetwater about 10 minutes ago and just got a call from them making sure my address and everything is correct so that the order goes perfectly. Was not expecting that but *very* happy that they did. In all my years of ordering online, never had that happen.

Can't wait to get it!

I have found that Sweetwater has great personal service. In fact, they will contact you to make sure you are happy with your purchase.

Is the subdude gonna help if I have carpet with thick underlay rubber?

Help what? It might help -- depending on what problem you are trying to solve.

Snake oil if you ask me....

Anyone have FR charts with and without this device?

well... even if the fr charts are exactly the same before and after, that doesn't make it snake oil...

in my house with my sub, the product is worth the money, simply because it decouples the sub from the floor...

as with any "tool", the application you are using it for is key...

ymmv...

Or just make you're own:D

149177

I agree with making your own stand. I had a four shelf Salamander rack that I no longer needed. Took one of the shelves and glued some dense foam to the bottom. The foam was used as packing corner foam for a tube SVS sub I no longer had. Placed under my SVS Ultra 13 the stand eliminated the vibrations to my carpeted floors.

I agree with making your own stand. I had a four shelf Salamander rack that I no longer needed. Took one of the shelves and glued some dense foam to the bottom. The foam was used as packing corner foam for a tube SVS sub I no longer had. Placed under my SVS Ultra 13 the stand eliminated the vibrations to my carpeted floors.

And it's fun too;)

Or just make you're own:D

149177

Eric, that looks pretty slick! What did you use to make that? Plywood or MDF? I guess it really doesn't matter too much right?
Is that foam glued underneath?
I am thinking the DIY route is the way to go. Save money and it would be a fun project on the weekend.

Eric, that looks pretty slick! What did you use to make that? Plywood or MDF? I guess it really doesn't matter too much right?
Is that foam glued underneath?
I am thinking the DIY route is the way to go. Save money and it would be a fun project on the weekend.

I used 3/4 MDF and closed cell neoprene foam. I used rubber backed indoor/outdoor carpet which was a 2'x12' piece. I liked the black carpet better that was on the big rolls rather then the smaller stuff you find on the smaller rolls. I bought the foam from the foam factory and the carpet from Lowe's. The 1" neoprene works out much better then the open cell foam as it is more stable under the weight of my sub (70lb) but yet it will still compress as in the pic below. I only have carpet on the top and painted the edges of the MDF black. I think it gives it a cleaner look. It stands 2 1/2" high.

149205

i need 8x @ diff sizes.. custom sizes ?

400+$ ? :eek:

DIY Gramma 22 inch x 18 inch = 30 USD

I just bought an LFM-1 EX. Do I need a Subdude (or Gramma)? I live in a townhome with neighbors on both sides and the floors are wood laminate with concrete slab as the foundation. My walls shake when it's played at high levels but isnt it supposed to or will the Subdude eliminate this?

Would a subdude help me out? I have carpet over a cement floor under one sub, under the other is half on tile floor (fireplace) and half on the carpet over cement.
Will these help a layout like I described?

Would a subdude help me out? I have carpet over a cement floor under one sub, under the other is half on tile floor (fireplace) and half on the carpet over cement.
Will these help a layout like I described?

In a short answer, yes. It will help decouple it from the floor.

I just DIYed my own using plywood and dense packing foam and covered the plywood with black velvet. About 7 bucks total and it looks better than a Subdude.
Not sure if I prefer decoupling the bass, it was kind of nice to feel it before. Will have to try it out some more.

I just DIYed my own using plywood and dense packing foam and covered the plywood with black velvet. About 7 bucks total and it looks better than a Subdude.
Not sure if I prefer decoupling the bass, it was kind of nice to feel it before. Will have to try it out some more.

Where did you get the packing foam?

Where did you get the packing foam?

Check out Walmart and any craft store or you can order it on line from these people http://www.thefoamfactory.com/packagingfoam/packagingfoam.html

I just DIYed my own using plywood and dense packing foam and covered the plywood with black velvet. About 7 bucks total and it looks better than a Subdude.
Not sure if I prefer decoupling the bass, it was kind of nice to feel it before. Will have to try it out some more.

what sub do you have and in what size room?

even with the GRAMMA under my sub i can still feel it. i'd say that now i am just feeling the effects of the room being pressurized, and not the direct vibrations being sent through the floor and walls. so if you have enough sub you should still be able to feel it.

Where did you get the packing foam?

I scavenged it from some pro electronic gear packaging, it is really dense black polyethelene foam, plenty strong enough.

what sub do you have and in what size room?

even with the GRAMMA under my sub i can still feel it. i'd say that now i am just feeling the effects of the room being pressurized, and not the direct vibrations being sent through the floor and walls. so if you have enough sub you should still be able to feel it.

I have a MFW-15 in a 15 by 20 room, still plenty of bass, it just doesn't come up from the floor through your legs like it did before. The tradeoff from that particular visceral impact is the elimination of time arrival smear, and better articulation in the bass. It's a very distinct difference. This probably will be better for late night movie watching when others are trying to get some rest.

I have a MFW-15 in a 15 by 20 room, still plenty of bass, it just doesn't come up from the floor through your legs like it did before. The tradeoff from that particular visceral impact is the elimination of time arrival smear, and better articulation in the bass. It's a very distinct difference. This probably will be better for late night movie watching when others are trying to get some rest.

yup, those are all added benefits that definitely outweigh the con of not feeling the bass as much. i'll take better sounding bass over feeling the bass more, personally i still feel the bass plenty though. if i crank it loud enough i can pressurize the room enough to feel it that way.

Okay. I'm a believer now. I got a sub-dude on Saturday and it cleaned up the bass and I no longer hear any vibrations of pictures, windows or our fireplace doors.

All the energy seems to be there, it's just moving air now instead of shaking everything. I wasn't a believer in de-coupling, I have changed my opinion.

I made my own with MDF and foam blocks from a arts and craft store. It sounds alot better. Crisp and clean with out shaking the floor. I actually perfer the sound over the vibration. I was able to turn up the gain without it getting muddy or bommy. It is well worth it. Total cost $13.

Count me as one of the happy DIYers. I work in IT and after reading this thread I coincidentally a day or two later received a new server that came packed in some sort of dense foam stuff. I first out of laziness simply put 4 square pieces under each corner of my sub just to see if it made any difference. Yee gad did it ever. So after I found I could go way way up in vol and play with the gain, i went all in and built a nice little platform using some tongue and groove flooring from our recent renovations stained it to match the floor. High waf, much better sound, no more vibrations, this has been an all around winner, and it essentially cost me nothing except some time.

Sorry if this has already been posted elsewhere in this thread.....I've not read completely through it but a quick search didn't turn up the word "sponge(s)" so I thought I would pass this along.

After finally getting a sub that would rattle the room I had to get it up off of the hardwood floor. Four sanding sponges (3"x5"x1.25") were attached to the sub underside with small tabs of two-sided foam tape. This has decoupled the sub from the floor very effectively with an added benefit of the sub looking like it "floats" above the floor. The sponges are recessed in about 1.5" from front/side/back edges and hide in the shadow. I have no idea if this is better or worse than other methods but it works for me.

Sorry if this has already been posted elsewhere in this thread.....I've not read completely through it but a quick search didn't turn up the word "sponge(s)" so I thought I would pass this along.

After finally getting a sub that would rattle the room I had to get it up off of the hardwood floor. Four sanding sponges (3"x5"x1.25") were attached to the sub underside with small tabs of two-sided foam tape. This has decoupled the sub from the floor very effectively with an added benefit of the sub looking like it "floats" above the floor. The sponges are recessed in about 1.5" from front/side/back edges and hide in the shadow. I have no idea if this is better or worse than other methods but it works for me.

should work just fine. i doubt it's better, but i can't see it being worse either. :)

It does work well, I think, and very cost effective at @$2.50 for materials. Lot's of discussion in the thread about where to get dense foam....the sanding sponges are very dense and don't compress at all.

It does work well, I think, and very cost effective at @$2.50 for materials. Lot's of discussion in the thread about where to get dense foam....the sanding sponges are very dense and don't compress at all.

that's what you want. i tried making a DIY one but i couldn't find dense enough foam. never thought of sanding sponges. good info for anyone that might want to make their own.

I've recently changed subs and no longer have a need for my subdude, if anyone wants it let me know.

any ideas on what to use to get a huge sub off the floor? i got the eD A7-900 and want to get it off the ground but not sure what will be able to hold the weight, was thinking along the lines of the pads they use to get washers and dryers up off the floor because the thing weighs 400 lb. Any other ideas would be greatly appreciated!

Just got the Great GRAMMA for my Epik Castle and though it isn't a quantum leap in SQ, subjectively it does seem to have made bass a bit more "punchy" with music. Definition is better with double kick drums, and separation between bass guitar and kick drums, especially with quick, staccato notes/strikes is more pronounced. This is on a raised wood foundation with carpeting. On hardwood floors the difference would likely be even greater.

Just got the Great GRAMMA for my Epik Castle and though it isn't a quantum leap in SQ, subjectively it does seem to have made bass a bit more "punchy" with music. Definition is better with double kick drums, and separation between bass guitar and kick drums, especially with quick, staccato notes/strikes is more pronounced. This is on a raised wood foundation with carpeting. On hardwood floors the difference would likely be even greater.

exactly my experience.

exactly my experience.

Good to know I'm not crazy :)

Good to know I'm not crazy :)

Ditto x 3....Although I can't make the not crazy claim so easily, a few would disagree.

Good to know I'm not crazy :)

nope, not crazy. it wasn't a huge difference, but it was a very noticeable difference. everything just sounds punchier and more defined. notes seem to decay a lot sooner instead of hanging around.

nope, not crazy. it wasn't a huge difference, but it was a very noticeable difference. everything just sounds punchier and more defined. notes seem to decay a lot sooner instead of hanging around.

Yep, that's exactly it. I'm glad I got it. I don't know that people who aren't intimately familiar with my system would notice, but I sure do...and that's what matters :D

Just ordered a SubDude HD from sweetwater. My neighbors below me just returned from a 4 month vacation in Chicago. I didn't know anyone even lived below me until they knocked on my door and complained about my sub. I tried to do the sanding sponges, but that didn't help at all, most likely because it is downfiring. So now I am hoping that the SubDude fixes all my problems.

Just ordered a SubDude HD from sweetwater. My neighbors below me just returned from a 4 month vacation in Chicago. I didn't know anyone even lived below me until they knocked on my door and complained about my sub. I tried to do the sanding sponges, but that didn't help at all, most likely because it is downfiring. So now I am hoping that the SubDude fixes all my problems.

While it wont totally eliminate it, it will help reduce it.

nope, not crazy. it wasn't a huge difference, but it was a very noticeable difference. everything just sounds punchier and more defined. notes seem to decay a lot sooner instead of hanging around.

A lower decay time would be a measurable difference. You don't have to make this claim - you just have to post the graphs that prove it.

I generally do not subscribe to much "voodoo" - a lot of which I see posted here. But the reports that vibrations through the building were reduced makes a lot of sense depending on the surface and home construction, so that's why I grabbed some sponges and tried them out. Haven't done much A/B testing, but due to my bachelor status and the lack of items I have available to vibrate, I suspect this may have a bigger impact on my neighbors than it does on me.

Haven't had much time to A/B test either - which I will try to fit in some time this winter.

While it wont totally eliminate it, it will help reduce it.


I have the ONKYO HT-S7100 and I had the sub at about 75% and the receiver at about 45. When I turned it down to about 37 and the sub to 25% it seemed to be alright, so hopefully it will reduce it enough. Once I get it in, I am going to ask my neighbor if I can experiment with different settings and go down stairs to see if I can hear anything.

I have the ONKYO HT-S7100 and I had the sub at about 75% and the receiver at about 45. When I turned it down to about 37 and the sub to 25% it seemed to be alright, so hopefully it will reduce it enough. Once I get it in, I am going to ask my neighbor if I can experiment with different settings and go down stairs to see if I can hear anything.

First step before trying gadgets is proper calibration. It sounds like you have your bass way overcooked.

The Subdude won't stop the LF soundwaves from pissing off you neighbors. What it will do is stop the floor, windows, cups on the tables from becoming part of the soundtrack.

First step before trying gadgets is proper calibration. It sounds like you have your bass way overcooked.

The Subdude won't stop the LF soundwaves from pissing off you neighbors. What it will do is stop the floor, windows, cups on the tables from becoming part of the soundtrack.

If it can reduce vibrations in your apartment, wouldn't it also do the same for your neighbors?

In an apt building, you are sharing walls and a floor/ceiling...

If it can reduce vibrations in your apartment, wouldn't it also do the same for your neighbors?

In an apt building, you are sharing walls and a floor/ceiling...

Sure, but the low frequency sound waves will still make their way through the walls and floors. You would need large bass traps to prevent this.

I will try to re-calibrate my system when I get the subdude with Onkyo's calibration microphone.

If the subdude and the re-calibration doesn't work then I have 2 choices, either sell my entire system or turn the bass super low.

The person below me was more complaining about the rattling, but maybe she just thought the rattling and LF were the same thing.

I will try to re-calibrate my system when I get the subdude with Onkyo's calibration microphone.

If the subdude and the re-calibration doesn't work then I have 2 choices, either sell my entire system or turn the bass super low.

The person below me was more complaining about the rattling, but maybe she just thought the rattling and LF were the same thing.

Choice number 3. Invite her up to watch some movies :D

Choice number 3. Invite her up to watch some movies :D


Touche!!!!!

I went down and talked to her again today, and re-confirmed that it is mostly the rattling that she hears. Although she said she could hear me playing the drums on rock band, but I told her there isn't much I can do about that.

Once I get the subdude (which sweetwater already shipped, they are super awesome there) she is going to let me run test on it to see what the threshold is.

^^^Take a nice bottle of vino, just in case...... :D

I just got a subdude and it did make a significant difference.

By the way I got it here, ordered wednesday afternoon, delivered thursday afternoon. Free shipping

http://www.truesoundcontrol.com/products/SUBDUDE.html

Just got mine in today, looks very nice under the sub, I have to run some test on it though to see if there is a big difference and if it helps with the neighbors downstairs.

Just got mine in today, looks very nice under the sub, I have to run some test on it though to see if there is a big difference and if it helps with the neighbors downstairs.

How did it go?

How did it go?

So far so good, I will say that it really helped the overall sound of the sub. It sounds a lot better. I have not had any issues with my neighbor downstairs. My sub woofer is on 50% and I re-calibrated with Audysee. I watched a few blu-rays and also starwars IV and V and no issues at all and sounded great. The sub isn't as loud as I would like, however I will have to wait until I get a house to really blast it... or wait until they go on vacation again.

Meanwhile, there's another thread that's active today in which people are talking about how to get more shaking floors because they like to feel it.

Funny, sorta.

Would this help with my rattling ceiling fan??? It's so annoying.

Would this help with my rattling ceiling fan??? It's so annoying.

maybe. i had a lot of rattling things in my room. before i went and hunted them all down i got a GRAMMA and it put most if not all to rest. i don't notice anything rattling now.

Since my first sub is on its way, arrives today actually! (BIC F12) I decided last night to go out and get some materials for my own sub pad.

Here is what I used:

16" x 48" x 3/4" MDF - cut to 16" x 18" (slightly larger than my sub)
(1) 2' x 5' piece of black ribbed indoor/outdoor carpet (better to buy a thinner carpet so its easier to manipulate
(2) 2" x 4" x 12" green hard styrofoam block (got these at michaels near the softer plant foam, I can stand on them without any compression)

Tools: Staple gun, scissors, styrofoam glue

I had the guy at Home Depot cut the MDF for me, brought it home, cut a piece of carpet about 2' x 2', and basically upholstered the board.

Then I just glued the styrofoam to the bottom towards the outside edges of the board. I plan on getting one of those egg-crate pads for mattresses to cover the remaining bare wood on the bottom of the board.

All in all, I think it came out pretty good, the carpet is very tought and it looks sharp, I will post some pictures later today when I get home from work, and the new sub should be here by then too!

Total cost for the pad: $20 - the biggest expense was the piece of carpet, it was $10 for the pre-cut runner, and I could only purchase a 2'x12' sheet if I had them cut it for me, which would have been like $16.

Am I missing something?

Certain types of closed cell foam are used to absorb vibrations. While styrofoam is technically closed cell foam, I don't think it is going to be effective for this usage.

I realize there is a huge lack of testing with many of these materials, but imo hard styrofoam seems inappropriate for the application.

Yea Polyethylene foam is best for absorbing vibrations, but I could not find any at home depot or michaels craft store. However, the general category you want to be in is closed cell foam/padding, of which polystyrene (styrofoam) falls into.

So its not the most ideal material, but for $5, its the best I could at the time. I will definitely keep an eye out though for some polyethylene foam, and replacing the foam on my pad would not be hard at all.

So I have a question. I'm looking at getting a subdude seeing how I live in an old apt building and I just bought a Epik Sentinel subwoofer. But the problem is that the sub has a 20x15 footprint. Will I be okay with just the normal subdude?

So I have a question. I'm looking at getting a subdude seeing how I live in an old apt building and I just bought a Epik Sentinel subwoofer. But the problem is that the sub has a 20x15 footprint. Will I be okay with just the normal subdude?

No, you need the Gramma, which is 23" X 15"

Am I missing something?

Certain types of closed cell foam are used to absorb vibrations. While styrofoam is technically closed cell foam, I don't think it is going to be effective for this usage.

I realize there is a huge lack of testing with many of these materials, but imo hard styrofoam seems inappropriate for the application.

i agree. the foam needs to be at least a little soft and a little absorbent.

No, you need the Gramma, which is 23" X 15"

yup i have a GRAMMA under my Sentinel. works perfect.

I ordered one from Amazon, should be here by Wednesday. Will chime back in with observations.

I have two of them under a Conquest.

Bill

Quick question..tried reading through the 22 pages of posts but didn't see my question.
I have an M&K MX-150 sub, which has dual 12" drivers. One points up from the bottom, the other aims out the front within a lower ported box.
I've set the sub on a subdude using spikes. Is this the best way? I was thinking of maybe getting rubber feet for the sub but not sure which is best or if it even matters. :confused:

Do any of you use the subdude or something similar for your (L/R) tower speakers? I have Paradigm Monitor 9's, with spikes on carpet over a concrete slab. Would using a subdude or pair of mopads for the mains offer any additional benefits?

Anyone know if the Bic F12 will fit on one of these? 15 x 15 and my sub is 14.25" wide x 17.25" deep with rubber feet attached to the base...

Do any of you use the subdude or something similar for your (L/R) tower speakers? I have Paradigm Monitor 9's, with spikes on carpet over a concrete slab. Would using a subdude or pair of mopads for the mains offer any additional benefits?

Out of the blue last week I got a call from Guitar Center offering me a $20 gift card. I thought why not use it for another set of Mopads for my mains.

First, this was not the brightest idea I've had. My mains are HEAVY. The mopads seem to be holding the weight for now, but I'm concerned they will start to crush later on.

I really haven't noticed any difference with the mopads under the mains. In fact I believe I will remove them this weekend before they are crushed.

IMO, putting something under the mains is not worth the effort. Perhaps if I was running the mains as full range, but with most of the low end handled by the sub the impact is limited.

I've tried searches and still cannot find the answer. Should spikes or rubber feet be left on your sub when using a subdude? Thanks for any feedback.

I've tried searches and still cannot find the answer. Should spikes or rubber feet be left on your sub when using a subdude? Thanks for any feedback.

I have my SVS PB12 Ultra/2 sitting directly on the Grammas without any spikes or rubber feet (mine has a bass plate on the bottom). If your sub does not have a bass plate, I would think rubber feet (just to protect the Subdude from the spikes). Not sure either way...

I've tried searches and still cannot find the answer. Should spikes or rubber feet be left on your sub when using a subdude? Thanks for any feedback.

I ended up leaving the spikes on and putting floor discs under the spikes to protect the subdude from ripping.
I bought some pretty sweet ones from ebay for $16 a set. Looks nicer too.

I have laminate floors w/ 2 PA-120's that rattle my whole house during movies so I wanted to see if there was anything out there besides the bartender rubber mat that I put under them to stop vibrations.

I found this thread and ordered 2 Grammas from B&H Photo and they showed up yesterday a week after ordering.

I played my usual U-571 (depth charge scene) & Star Wars -Clones (opening giant starship flyover/landing) first wthout the grammas then with.

I was pleasently suprised to hear about 2/3 reduction in plate/picture rattling that always goes on. Even my wife said it rattles less. I tried music thru my subs and there was a small noticible difference in the way the sub responded.

I realized that I hadn't rerun my YPAO auto setup thru my Yamaha AVR and after doing that it improved my musc ever so slightly.

My PA-120's are very good entry level HT subs that can rattle the house. The gramma reduced that but even better made my subs sound better w/ music.

For $100 for both, I think its good buy and are very well built, especially helping with my floating laminate floors.

My $.02.

so I'm going have to order one of these tonight then. Seems amazon is the place for me to get it due to free shipping(and I have prime so 2 day shipping, Subdude Gramma (http://www.amazon.com/gp/product/B0002D0B4U?ie=UTF8&tag=thecolharblo-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B0002D0B4U)) I have a small apartment so this will be a must.

I'm sure I'll get flamed for this, but I find 50-$60 for this thing to be borderline outrageous. I wonder how (6) 18X18 rubber-backed carpet squares from Home Depot for $12-$15 would compare?

James

EDIT: Wait, I take that back, since my sub is 18"X18" I'd need to spend EIGHTY dollars on a GREAT gramma.

give me a break.

I'm sure I'll get flamed for this, but I find 50-$60 for this thing to be borderline outrageous.

Agreed. After spending $30,000 on my HT and equipment, I'm not about to blow $60.


And screw those expensive accoustic treatments, I just tacked up carpet squares around my room. Money well saved.

I wonder how (6) 18X18 rubber-backed carpet squares from Home Depot for $12-$15 would compare?

About as well as using a rope, instead of a belt, to hold up your pants. Sure, it might do the trick. But, it won't be pretty. :)

just put this under my sub that would rattle my window, now that's basically gone...i'm afraid to ask my downstairs neighbor if it's lightened up or still annoying for him XD

Agreed. After spending $30,000 on my HT and equipment, I'm not about to blow $60.


And screw those expensive accoustic treatments, I just tacked up carpet squares around my room. Money well saved.

About as well as using a rope, instead of a belt, to hold up your pants. Sure, it might do the trick. But, it won't be pretty. :)

LOL. I totally agree with both of you. I mean, there's a time to be frugal to save money, but then there's a time when you just want things done right. I got a complaint from my neighbors after I setup my 8" Cambridge Soundworks subwoofer and cranked it up. After buying the Subdude, I haven't had a complaint since and noticed that vibrations are less in the floor. My HT is in the 2nd floor of a townhouse.

Agreed. After spending $30,000 on my HT and equipment, I'm not about to blow $60.


And screw those expensive accoustic treatments, I just tacked up carpet squares around my room. Money well saved.

Poor analogy (even at $30,000 which is about five to ten times what most spend on their tv, receiver, speakers, and source component(s)).

An argument can be made regarding the R&D, materials, performance, and inherent, UNDUPLICABLE nature of a 7-$800 receiver.

It's difficult to apply the same logic to this item.

And, by the way, the carpet squares would prove to VIRTUALLY INVISIBLE when properly cut and positioned- kinda flies in the face of this eye-sore argument.

James

About as well as using a rope, instead of a belt, to hold up your pants. Sure, it might do the trick. But, it won't be pretty. :)

See the above comment. The best part: as if the "gramma" is anything but a**-ugly in the first place, LOL. Perhaps it looks at home on the floor at a bar, but not so much in someone's living room.

Again, the carpet squares could of course be cut in ten minutes to PERFECTLY fit the given application. Anything visible at ALL...at ALL...would appear to be a black mass...kinda like something else?

Bashing the idea sounds great, especially to the guys who have probably spent $100+ on $3 worth of foam, but in reality, it would almost certainly accomplish the same or nearly the same thing, at a FRACTION of the cost, and look better.

Gramma on though...

James

I'm sure you can do a lot better than the Gramma in terms of looks and price if you go the DIY route. However, I highly doubt that carpet squares will do the trick. I think most of the effect from the Gramma comes from the foam.

I'm sure you can do a lot better than the Gramma in terms of looks and price if you go the DIY route. However, I highly doubt that carpet squares will do the trick. I think most of the effect from the Gramma comes from the foam.

Rubber-backed carpet squares would have closed cell foam padding on them. That's the same kind of material employed by these risers.

I agree that the aesthetics of these devices are questionable, and if you can come up with dampening padding that works that is hidden below the sub for a fraction of the cost, I say go for it.

To each his own, I guess.

How about this foam?
http://www.reliablehardware.com/blackrigidpolyethylenefoam-2thick.aspx

....two strips attached to the bottom of a cut-to-size 1" MDF, which can be covered with a carpet square to avoid scratching.

Rubber-backed carpet squares would have closed cell foam padding on them. That's the same kind of material employed by these risers.

I agree that the aesthetics of these devices are questionable, and if you can come up with dampening padding that works that is hidden below the sub for a fraction of the cost, I say go for it.

To each his own, I guess.

Thank you. See, what some are envisioning here is a bit faulty, I think.

For instance, I'm getting a Trinity tomorrow and the base is 18X18. Now, of COURSE I am not going to cut/position an 18X18 square. A 17X17 or 16X16 cube will be MORE than adequate to completely, solidly support the cube, provide the isolation I desire, AND appear nearly invisible from almost every angle in the room. Really, it should appear that the sub is just "floating" for lack of a better word.

I don't doubt the ability of the gramma to dampen, I just take issue with the price, is all.

I didn't mean to come off like a jack-a**, but $80 seems a bit much IMO.


James

How about this foam?
http://www.reliablehardware.com/blackrigidpolyethylenefoam-2thick.aspx

....two strips attached to the bottom of a cut-to-size 1" MDF, which can be covered with a carpet square to avoid scratching.

It appears serviceable enough, but look at the price.

James

Thank you. See, what some are envisioning here is a bit faulty, I think.

For instance, I'm getting a Trinity tomorrow and the base is 18X18. Now, of COURSE I am not going to cut/position an 18X18 square. A 17X17 or 16X16 cube will be MORE than adequate to completely, solidly support the cube, provide the isolation I desire, AND appear nearly invisible from almost every angle in the room. Really, it should appear that the sub is just "floating" for lack of a better word.

I don't doubt the ability of the gramma to dampen, I just take issue with the price, is all.

I didn't mean to come off like a jack-a**, but $80 seems a bit much IMO.


James

Just as some may take issue with the price of the Trinity when you could build one yourself for less.

If you have the tools, knowledge, and ambition I say make something yourself. If you are like most of us, spending a few dollars on a product like the Gramma is not a big deal - especially when placed under a $2000 sub woofer.

Just as some may take issue with the price of the Trinity when you could build one yourself for less.

If you have the tools, knowledge, and ambition I say make something yourself. If you are like most of us, spending a few dollars on a product like the Gramma is not a big deal - especially when placed under a $2000 sub woofer.


Yeah, I took issue with the Trinity's price too ($3000), so I bought it for $1400!

Again, my point is, that the gramma doesn't offer ME a lot of value, as I can easily duplicate its effect at a fraction of the cost. I can't say the same about the Trinity.

James

It appears serviceable enough, but look at the price.

James

Sorry, somehow I got confused and I thought you needed more than one riser.

Here's another one that's only 1" thick but you could use two layers:
http://cgi.ebay.com/Professional-Polyurethane-Foam-12-x-12-x-1-flat-set_W0QQitemZ250482962222QQcmdZViewItemQQptZLH_DefaultDomain _0?hash=item3a51f2af2e

Whataver route you end up taking, it'd be interesting so see your impressions and/or pictures. I like what the Gramma did to improve my subwoofer's performance but I agree with you that it's not the best looking nor the most cost effective solution.

I will move forward with my idea and post pics with honest results.

If the carpet fails, perhaps I'll bow-down to the "gramma".

James

I made my own "sub-dude" for about $30 (can do this for less if but I needed a staple gun and glue).

3/4" MDF
2'x5' black carpet runner
I bought hard green styrofoam, might replace this with the softer foam that my sub came with

Works very well, and all you see is a black base under the sub, it actually turned out really well and looks like something you would buy. Plus, I have enough supplies left over to make 2 more for my front L and R, which I hear can make a difference.

I have a phoenix which is 22x22. Sounds like I would have to do a diy. The phoenix has ports that fire down. That should not matter, right?

No, downfiring subs actually benefit more from the sub-pads than front-firing.

I will move forward with my idea and post pics with honest results.


Many people in this thread have posted about their DIY subdudes. They work fine. Some of us would rather spend the $50 - $75 than bother with it (heck that's like one hand of black jack in Vegas), some would rather make it themselves. Just like everything else in this hobby. Some would never even consider buying a subwoofer (like you did), but would rather DIY. I don't see them going into all the subwoofer threads, however, and talking about what a rip off subwoofers are when they could be built for a fraction of the cost. Why do you think that is?

I have a spare subdude that is just sitting in my bedroom. It's the smaller version and needs a good cleaning, but there are no tears of any sort....will sell cheap...just pm me.

Hey all...

Quick question about a stiff foam for de-coupling a sub...

How about those foam tubes that are used to insulate small / medium size water pipes (to keep them from freezing)?

Here in Maine you can buy a bunch for a low price...

Would those work as a de-coupling foam?

http://ecx.images-amazon.com/images/I/51T7H71688L._SS500_.jpg

Thanks for any advice :).