Auralex Subdude Owners Thread - Page 3 - AVS Forum
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post #61 of 1318 Old 02-16-2006, 07:10 AM
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I've had my Hsu VTF3 sitting on a Subdude for a couple of months now... I have medium-thickness pile carpet (with a really good pad) in the room, and always thought that the woofer on this sub was way too close to the carpet to put out as cleanly as it could.

The Subdude has helped to clean the bass up quite a bit (this is subjective), and in re-calibrating, I have had to turn it down a notch... also have way fewer rattles in frequency sweeps.

It's a pretting solid product that I can recommend, especially if you have a down-firing sub with no platform underneath it...
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post #62 of 1318 Old 02-16-2006, 08:40 AM
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Quote:
Originally Posted by Dundas View Post

Kal,
I wonder how 3 or 4 stacked SubDudes would compare to a SubTrap?

If you stacked enough SubDudes to equal the height of a SubTrap, you still would not duplicate the trap component of the latter.

Kal

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post #63 of 1318 Old 02-16-2006, 08:47 AM
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Quote:
Originally Posted by rynberg View Post

Hah! I WISH concrete floors couldn't vibrate!

Obviously, a thick concrete slab at grade will not transmit vibration very effectively, but a concrete floor at above grade will EASILY transmit vibration. If anyone wants a thorough explanation or real world cases, I would be happy to go into more detail, but I bill out at $180/hour..

I have a fairly flimsy wood floor in my listening room, I think I might give the Sub Dude a try.....it's actually pretty fairly priced for what it is.

OK. OK. Anything will vibrate given the right stimulus. However, considering the output of almost any subwoofer and a solid (even above grade) concrete floor, the amount of spurious vibration should be small.

After all, I can hear when the kids who live above me jump up and down (rare) and that is transmitted through the ceiling and other structures. But it is tight and doesn't continue to ring. The problem with the wood floors (especially if sprung) is that they continue to vibrate long after the original response and, consequently, muddy the in-room sound. I do not get such resonant behavior with my concrete floors.

Of course, I am speaking only from my observations and not from a technical background on the topic.

Kal

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post #64 of 1318 Old 02-16-2006, 12:40 PM
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Anybody who's lived in a concrete highrise will be quite familiar with how bass can travel thru the floors...and it's quite frequently very difficult to pinpoint the culprit. I'm on our condo board and have had to deal with sound complaints from bassheads. Actually, it's not necessarily the bassheads, but those who crank the volume. The BASS is what travels from unit to unit to unit to unit..........

I may try a Subdude underneath my DD-12 at some point..just to be nice to my neighbors.
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post #65 of 1318 Old 02-16-2006, 12:55 PM
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Quote:
Originally Posted by Kal Rubinson View Post

OK. OK. Anything will vibrate given the right stimulus. However, considering the output of almost any subwoofer and a solid (even above grade) concrete floor, the amount of spurious vibration should be small.

After all, I can hear when the kids who live above me jump up and down (rare) and that is transmitted through the ceiling and other structures. But it is tight and doesn't continue to ring. The problem with the wood floors (especially if sprung) is that they continue to vibrate long after the original response and, consequently, muddy the in-room sound. I do not get such resonant behavior with my concrete floors.

Of course, I am speaking only from my observations and not from a technical background on the topic.

Kal

You are certainly correct that a concrete floor will produce less airborne noise in the room than a wood floor would. I was just addressing the statements that a concrete floor wouldn't transmit vibration...

BTW, I've been reading your Music in the Round column backissues...you have some nice informative articles, especially in regards to your experiences with room acoustics and bass management.
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post #66 of 1318 Old 02-16-2006, 03:44 PM
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Quote:
Originally Posted by rynberg View Post

You are certainly correct that a concrete floor will produce less airborne noise in the room than a wood floor would. I was just addressing the statements that a concrete floor wouldn't transmit vibration...

Yeah. Sorry for being sloppy in my terms.

Quote:


BTW, I've been reading your Music in the Round column backissues...you have some nice informative articles, especially in regards to your experiences with room acoustics and bass management.

Thanks. More to come.

Kal

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post #67 of 1318 Old 02-16-2006, 05:39 PM
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Quote:
Originally Posted by Kal Rubinson View Post

If you stacked enough SubDudes to equal the height of a SubTrap, you still would not duplicate the trap component of the latter.

Kal

Don't you mean that you don't think it "would not duplicate the trap component of the latter"? You wouldn't know for sure unless you tested it. The Subdude/Gramma is made of Auralex sound absorbtion products.
In any event, for a fraction of the cost of a SubTrap, it might be possible to get some of the benefits of a SubTrap by stacking several Subdudes.
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post #68 of 1318 Old 02-16-2006, 06:10 PM
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I believe The GRAMMA and The SUBDUDE are the same. The GRAMMA is covered in black carpet and the SUBDUDE is grey.

G.E.M.
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post #69 of 1318 Old 02-16-2006, 07:43 PM
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Quote:
Originally Posted by Dundas View Post

Don't you mean that you don't think it "would not duplicate the trap component of the latter"? You wouldn't know for sure unless you tested it.

Of course but, since the SubDudes lack any specialised bass trapping, it seems quite probable.

Quote:


The Subdude/Gramma is made of Auralex sound absorbtion products.

Yeah but not enough to absorb air-borne bass.

Quote:


In any event, for a fraction of the cost of a SubTrap, it might be possible to get some of the benefits of a SubTrap by stacking several Subdudes.

You can try it. The height of the SubTrap was the big problem for me and simulating it's least attractive feature with a less specific kludge doesn't appeal to me.

Kal

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post #70 of 1318 Old 02-16-2006, 11:57 PM
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Can it be cut to fit the bottom of my PC-U?
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post #71 of 1318 Old 02-17-2006, 12:16 AM
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You guys are robbing Peter to pay Paul. If your sub is sending subsonic frequencies out its bottom and its rear, then Its robbing the power of the driver(s) already, ask your manufacturer for a resonance free cabinet, that way you dont need foam.

if you put the sub on foam, the foam will move ( a little) instead of the driver, further weakening the strength of your driver's frame.

So my advice is to just turn it down
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post #72 of 1318 Old 02-17-2006, 05:32 AM
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Quote:
Originally Posted by JohnR_IN_LA View Post

So my advice is to just turn it down

Where's the fun in that?
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post #73 of 1318 Old 02-17-2006, 11:19 AM
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Quote:
Originally Posted by ---k--- View Post

oooh oooh ooh, I am! I am! Can I answer this question?



Actually I don't know the answer. I doubt it, but it could be that you are shifting the location of the sub just enough not to excite a room mode at your seat. You always see the anti-eq crowd talk about how eq only affects one seat, and if you move your mic a few inches the response is totally differnt. Which is correct. Sub postion works the same way, move a few inches and you get a differnt response.

Or maybe it is the cable elevator theory?

Nope nothing to do with position. I have my Ultra moved many times over the pass 6 months and that vibration on the floor is always there. It went away only when I had it on the Subdude and I have also been moving it slightly but no floor vibration.....

Well.... Its a mystery then =-p My EQ MKV15 just came... so maybe my floor will start vibrating again heee....

Oliver
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post #74 of 1318 Old 02-20-2006, 08:19 AM
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I spent the weekend with my new Subdude. While it doesn't completely eliminate the floor vibrations they are greatly reduced. I'm very happy with it. Thanks to everyone that recommended it.

Jeff

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post #75 of 1318 Old 02-20-2006, 08:21 AM
 
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I put something under my subwoofer to eliminate floor vibrations ......... hated it..... i actually like the feeling when the floor and couch vibrates so count me out of ever buying one of these.
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post #76 of 1318 Old 02-20-2006, 08:53 AM
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Foxymulder... ever considered a Buttkicker.... I used to think it was a gimmick until I got one for our double reclining couch. Reallly is great as long as its not over used...
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post #77 of 1318 Old 02-20-2006, 02:36 PM
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Quote:
Originally Posted by Kal Rubinson View Post

I ain't a structural engineer, so I don't know. Might be the tiles or something else.

One of my systems is in a reinforced concrete building and it's like a rock. I can rattle the paintings and cabinets and even the multilayer sound-barrier windows, if I try, but the walls, floor and ceiling are inert.

Kal

... but did you stay at a Holiday Inn Express last night?



All the best...

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post #78 of 1318 Old 02-20-2006, 03:20 PM
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Quote:
Originally Posted by meat_rocket View Post

Any ways to custom make one that will fit exactly to my sub? It seems the length will be a little too long for me and will have some overhang. Will a custom piece of granite/marble work just as well?


You can easily create your own by using Owens Corning 705 at about 4 " thick. You can grab one panel of this stuff from an insulation store and cut it to size. Wrap it in some fabric, and viola'! You've got something that will really help for about 15.00.

Good luck!






readyacoustics.com

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post #79 of 1318 Old 02-22-2006, 08:04 AM
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Anyone know where I can buy 1 panel of OC 705 online?
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post #80 of 1318 Old 02-22-2006, 08:05 AM
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Quote:
Originally Posted by Mark L. Schifter View Post

... but did you stay at a Holiday Inn Express last night?



All the best...

mls

Yes, and we rattled the walls!

Kal

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post #81 of 1318 Old 02-27-2006, 06:52 PM
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Last weekend I picked up two Auralex Gramma's since they can handle more weight. I noticed an instant difference. The DJ's voice from the radio sounded flatter, more natural, not "radio" sounding at all. Then out came the CD's, wow, I heard things in the music that I never heard before. Then some movies, didn't notice much difference in soundtracks, but the house and windows shook and rattled less. Very cool. Love these things.

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post #82 of 1318 Old 02-28-2006, 09:56 AM - Thread Starter
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I hung five acoustic panels last weekend, the first treatments for my room. There was an improvement in SQ, but still not as much as I got from the Subdude. Best fiddy I've spent since that time on Kalakawa St. in Honolulu about 20 years ago......

With my system, In my room, to my ears......
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post #83 of 1318 Old 03-01-2006, 09:21 AM
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So, other than looks, is the Gramma functionally the same as the Subdude? I was able to purchase a Gramma yesterday locally for $40, so I went with it.
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post #84 of 1318 Old 03-01-2006, 09:36 AM
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Cap, now you just can't a sentence like that. We need details

Redskin, yea I believe they are functionally the same.

I have come here to chew bubblegum and kick ass...and I'm all out of bubblegum .
My System

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post #85 of 1318 Old 03-01-2006, 10:56 AM
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redskin,

identical except for the graphics/labelling

Certified Ultra Professional AVS Special Member Class A
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post #86 of 1318 Old 03-01-2006, 01:03 PM
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Almost indentical, functionally the same but the Gramma has a weight capacity of 300 lbs. and comes in black/charcoal instead of just gray.

Redskin: $40 is a good price, I got mine at Sam Ash for $49 here in SoCal.

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post #87 of 1318 Old 03-01-2006, 01:12 PM
 
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Quote:
Originally Posted by MRL View Post

Foxymulder... ever considered a Buttkicker....

I'm not ready to get married just yet.
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post #88 of 1318 Old 03-01-2006, 05:57 PM
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Got my Gramma today!!!! I have hardwood floors.
Noticeable sound improvement...I have to turn the gain down on the sub.....much cleaner bass output

Subwoofer searching.....Search Completed 2/25/06!
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post #89 of 1318 Old 03-02-2006, 05:49 AM
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Should a subdude improve the sound if the floor is concrete? My theater is in my basement.
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post #90 of 1318 Old 03-02-2006, 08:25 AM
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Quote:


So my advice is to just turn it down



HERETIC!

There must be a banning!

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