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post #1831 of 6616 Old 04-25-2019, 12:57 PM
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Quote:
Originally Posted by SBuger View Post
I agree @tvuong - a TR demo disk with lots of ULF and LF would be awesome, especially since the BOSS is getting so popular and most everyone will have super capable TR into the singles before long.
Thanks for the list, Shelby
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post #1832 of 6616 Old 04-25-2019, 12:57 PM
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Originally Posted by Gorilla Killa View Post
@SBuger Dredd is a movie that has wobble throughout, quite a bit I never knew had it. 51:38 has 11hz and 16hz that I never knew was there before. Too many spots too list


Dredd is bass fest. A lot of ULF also.


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post #1833 of 6616 Old 04-25-2019, 01:00 PM
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Quote:
Originally Posted by Sekosche View Post
It pulls more current in 2ohm to deliver higher wattage with less resistance, but these are so easy to drive it shouldn’t be a hard working load on the amp. Like you said, the amp is rated for it, so shouldn’t be much difference driving 2 or 8 as far as longevity or noise, but I’m no expert.

Might run a little warmer. I do know that my 6K pushes 1,000 watts peak with the limiter on into 4-8ohm and barely seems to break a sweat which would be the same load driving the 3K in bridge mode.
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Originally Posted by raynist View Post
I am pretty sure a lower ohm rating is harder to drive for an amp. Maybe it will run hotter?
Thanks guys. To be safe, I will bridge the amp for 8ohm load. Tim thinks bridging the NX3000D in 8ohm should give me 125W RMS to each of the 8 GX1200 JBL drivers.
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post #1834 of 6616 Old 04-25-2019, 01:22 PM
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Originally Posted by tvuong View Post
Thanks guys. To be safe, I will bridge the amp for 8ohm load. Tim thinks bridging the NX3000D in 8ohm should give me 125W RMS to each of the 8 GX1200 JBL drivers.

Good call, that will put less stress on the amp. That will also avoid possible bus pumping from running in half-bridged mode with load only on one of the two channels.
When you bridge an amp, the output voltage doubles, which means 4x the power output. Your 8R bridged is similar to 4R on both channels each.

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post #1835 of 6616 Old 04-25-2019, 03:01 PM
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Originally Posted by Gorilla Killa View Post
I guess it depends on if Hudson either mischaracterized what they have or if they are different. This video makes me ponder they may be better. Ill know soon enough.
It'll be interesting to see how they perform. I'd love to see an A/B test of them. I was going to order a few more of the Hudsons but I'm going to hold off now.

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Originally Posted by tvuong View Post
Thanks guys. To be safe, I will bridge the amp for 8ohm load. Tim thinks bridging the NX3000D in 8ohm should give me 125W RMS to each of the 8 GX1200 JBL drivers.
Any reason you didn't want to go with 4 on each channel at 4 ohms?
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post #1836 of 6616 Old 04-25-2019, 03:13 PM
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Originally Posted by DesertDog View Post
It'll be interesting to see how they perform. I'd love to see an A/B test of them. I was going to order a few more of the Hudsons but I'm going to hold off now.
Ill do a A/B with the vibsensor when I get them. Ill use the w/n 0-50 to keep things equal. I noticed Amazon says back in stock May 3rd. I hope they are at least comparable but I wasn't dropping $40 for 4 when i could get 24 for a $150, although they could end up being a bust. Then again i got a better deal.
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8hz ULF TR for the masses and the Cashless. Like a BOSS


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post #1837 of 6616 Old 04-25-2019, 03:22 PM
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From a fortune cookie I've saved for many years:
"A bargain is something you don't need at a price you can't resist."
Hope they work out for you, bargain or not.
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post #1838 of 6616 Old 04-25-2019, 04:01 PM
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Originally Posted by DesertDog View Post
Any reason you didn't want to go with 4 on each channel at 4 ohms?
I don’t want to have to adjust the volume and enter dsp filters two separate times on the 3000d. I like to run my 2 platforms as one big platform. That is my only reason.
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post #1839 of 6616 Old 04-25-2019, 04:02 PM
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Originally Posted by peniku8 View Post
Good call, that will put less stress on the amp.
When you bridge an amp, the output voltage doubles, which means 4x the power output. Your 8R bridged is similar to 4R on both channels each.
Thanks for the affirmation.
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post #1840 of 6616 Old 04-25-2019, 04:04 PM
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From a fortune cookie I've saved for many years:
"A bargain is something you don't need at a price you can't resist."
Hope they work out for you, bargain or not.
Michael
Confucious says" You need more Iso's, buy in bulk"

8hz ULF TR for the masses and the Cashless. Like a BOSS


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post #1841 of 6616 Old 04-25-2019, 04:30 PM
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Quote:
Originally Posted by Gorilla Killa View Post
@SBuger Dredd is a movie that has wobble throughout, quite a bit I never knew had it. 51:38 has 11hz and 16hz that I never knew was there before. Too many spots too list
Quote:
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Dredd is bass fest. A lot of ULF also.


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Cool, yeah Dredd is awesome and is full band, even without BEQ. Lots of wobbles!! But believe it or not lol there is a BEQ for it that lifts that low end up just a bit more from 30hz and down HERE and shows the graph. Gotta check this one out again now Thanks for bringing it up GK!!

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post #1842 of 6616 Old 04-25-2019, 09:27 PM
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trhought , thanks(?) for posting this and causing me to take on another project .

I've seen a few DIY shaker solutions , most looked pretty sketchy , cutting the cone out , gluing rods to dustcaps , etc . I wondered about what you've done and how it would work , but wanted someone to try first , so thank you!

Went to Home depot for a sheet of 3/4" OSB and some soft rubber stoppers that are a little over 1" tall and probably 1 1/2" around , and stopped at best buy for a $29 JBL CX1200 . half an hour of work and the platform and sub were under my couch , another 30 minutes pulling the driver out of my old Polk PSW 10 to use the amp for the JBL , and I'm off to the races . I'm getting pretty good TR with this , and not driving my neighbor on the other side of my living room wall nuts with my 2 18" drivers shaking the entire building . This is a great solution for me when shes home but I still want some shake . I'll be ordering some better isolators shortly , I don't think these rubber feet are wiggly enough . Probably hit best buy again for another driver, but that means I have to buy another amp, but then I can add more drivers to the BOSS...

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post #1843 of 6616 Old 04-26-2019, 04:57 AM
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Probably hit best buy again for another driver, but that means I have to buy another amp, but then I can add more drivers to the BOSS...
And so it goes....
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post #1844 of 6616 Old 04-26-2019, 05:42 AM
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AUD$314 for a pack of 24 Iso's from Isolate It with shipping to Australia


I had already thought of using Sorbothane and had contacted Australian supplier but the only thing they have is 1" sheet and they want $400 for that as well.


So much for cheap TR.................
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To have a full understanding of the BOSS I've started reading this whole thread from the beginning. I'm on post 221 of 1844!!
I have a feeling by time I reach 1844 this thread will be at 3000 lol.

I'm at March 11, so 45 more days to catch up on!
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post #1846 of 6616 Old 04-26-2019, 05:03 PM
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Quote:
Originally Posted by niterida View Post
AUD$314 for a pack of 24 Iso's from Isolate It with shipping to Australia


I had already thought of using Sorbothane and had contacted Australian supplier but the only thing they have is 1" sheet and they want $400 for that as well.


So much for cheap TR.................

I bought rubber plugs for chemical (lab) glassware. These come in all sizes, are duro 40 (decently squishy) and are usually widely available (for under 5 bucks each).
I haven't tried em out yet but they should work just fine. Just got all the parts today but had no time to get it working. Maybe I'll report back tomorrow.

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post #1847 of 6616 Old 04-26-2019, 05:09 PM
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Originally Posted by niterida View Post
AUD$314 for a pack of 24 Iso's from Isolate It with shipping to Australia


I had already thought of using Sorbothane and had contacted Australian supplier but the only thing they have is 1" sheet and they want $400 for that as well.


So much for cheap TR.................
I don't know what supply houses are in AUS , but you might be able to find something in an industrial supply catalog or supplier . https://www.grainger.com is one here in the US that might have bumpers or pads for industrial equipment that may suit at a fraction of the cost of products intended for audio or space shuttle equipment , as Sorbothane says their product is used for .

I picked up these rubber stoppers at Home Deopt in the specialty bolts and pieces bins in the hardware section as a temp solution until I have a few more things for an amazon order , and they are decent at least . Cost about 2 bucks each .


Just had a thought , has anyone looked into coil springs or little airbags for the decoupling ? I know coils would be tricky to get right , but don't know if it's a supid idea overall , for airbags I saw some little airbags for lifting and adjusting heavy items at Home depot , they inflate with a little bulb like a blood pressure cuff and say they can lift 300# each , so should be strong enough to last .

Edit: decided to play hookey and go buy another driver , and swung by the local Grainger . The only isolators that they could come up with a durometer rating were at 50 , so not close to the 20 the OP suggested , back to the drawing board there.

2 other possibilities I thought of . 1) my friends kid used to play hockey in the house , had a really soft , air filled hockey puck . Going to try to find those , if I remember the air was sealed in , but it was fairly easily compressed .
2) thought about wheelbarrow or hand cart pneumatic tires , or just the tubes . they are 8" or 10" diameter , and obviously adjustable depending on air pressure . A friend has a few hand carts at his shop for order picking , think I'll break in in the next couple days and "borrow" a few and see if the air ride suspension idea will work

Turn that $*!# UP!! --Beethoven

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post #1848 of 6616 Old 04-26-2019, 08:15 PM
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Originally Posted by GeoJustGeo View Post
To have a full understanding of the BOSS I've started reading this whole thread from the beginning. I'm on post 221 of 1844!!

I have a feeling by time I reach 1844 this thread will be at 3000 lol.



I'm at March 11, so 45 more days to catch up on!

It has been moving fast lately. When I heard this concept first mentioned a while back I assumed it was something you really needed a dedicated theater to implement; but boy was I wrong, and after seeing a few more users that love heavy TR give their impressions, I dove right in!

Buy the mats, build a BOSS, and profit from the absurdly cheap TR it adds in spades to the system. Have I mentioned I really like my BOSS?

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post #1849 of 6616 Old 04-26-2019, 08:28 PM
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I don't know what supply houses are in AUS , but you might be able to find something in an industrial supply catalog or supplier .

Those prices were from an industrial supplier - they have to get in from the US !!


I will have to think outside the riser - I like your ideas of an airbag or small tyre. I also thought of just a squishy rubber ball (I think someone mentioned that earlier).

Will go looking at the toy stores
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post #1850 of 6616 Old 04-26-2019, 09:57 PM
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I continue to be impressed by the BOSS. Able to get TR down to 3-4hz for the amount of money spent on this is insane. It feels like an extension of the main subs and seems so natural and integrated it’s fantastic. I have been playing with the crossover and LS filters and finally finding what I like. Had never known what 4hz feels like. It’s a strange wobble and me likes it.
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post #1851 of 6616 Old 04-26-2019, 10:24 PM
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I continue to be impressed by the BOSS. Able to get TR down to 3-4hz for the amount of money spent on this is insane. It feels like an extension of the main subs and seems so natural and integrated it’s fantastic. I have been playing with the crossover and LS filters and finally finding what I like. Had never known what 4hz feels like. It’s a strange wobble and me likes it.

I agree. If I hadn’t experience the BOSS for myself, I‘m not sure I’d believe most people if they told me I’d get this kind of performance from what’s essentially a sheet of plywood on isos and a few cheap $29 drivers. We’re lucky to get such low pricing in the states!

For BOSS-curious people, if the design will work with your seating and room, I strongly suggest you try it.

As you said, being an extension of the subs and feeling so natural is why it’s ridiculous to me how cheap one can build it for versus the alternatives. I really love my Crowsons for what they are capable of and ease of use, but the BOSS application puts them to shame in price/performance.

The BOSS is also way more visceral than even my near field subs could hope to provide into most of my body. I get good chest/kidney punch from nearfields, but it almost feels like my pants are going to rip off with the BOSS.

Also, I forgot if I mentioned I actually turned off one of my 18” marty subs to run the BOSS, because I ran out of amp channels for now; and it’s still vastly superior to the previous setup in TR throughput.
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on sale at bb right now
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post #1853 of 6616 Old 04-27-2019, 12:32 PM
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on sale at bb right now

Those without a BOSS should clear them out now!

They do seem to very frequently go on sale. Wonder how long this will last for? I’m good on drivers.

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post #1854 of 6616 Old 04-27-2019, 12:35 PM
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Those without a BOSS should clear them out now!

They do seem to very frequently go on sale. Wonder how long this will last for? I’m good on drivers.


I have got one extra on hand in case I get a bit happy and blow one out. I am not using the limiter on the amp.


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post #1855 of 6616 Old 04-27-2019, 02:27 PM
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So who wants to be the middle man for me and send them on to Australia since they won't post internationally
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post #1856 of 6616 Old 04-27-2019, 03:21 PM
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My Sorbothane Isos are in town,delivering Monday.

Meanwhile my Hudson Isos that would " be recieving tracking info any hour or tomorrow (Thursday)"

I have yet to receive any tracking. Disappointing people feel the need to bs things like this. I'd have been fine to be told there is a stock problem.
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post #1857 of 6616 Old 04-27-2019, 04:03 PM
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The Hideaway Theater

Attempting my dry run with a test subwoofer mounted directly to a chair.

Wowsers! Nearfield 18”s have NOTHING on this 10” Infinity mounted to the chair - as far as tactile response at lower, typical, listening volumes.

N O T H I N G!

Seriously...

With these direct mount subs I bet I may do away with nearfield subs all together (the only issue being how they scale towards reference levels when I get everything hooked up because the nearfield 18”s can lay the tactile feel down as you approach reference.). I’d then put all subs up front. I don't even have any rubber feet on these chairs! (I’ll need to experiment with that when they come back in stock.)

Just ordered 4 shallow mount subwoofers. 3.07" mounting dept. The Infinity's I have are too deep at nearly 7". The chair recline mechanism can't work. The MBQuart drivers are the right price (10% off coupon TEN4U on the sonicelectronix website and free shipping) --- we'll see if they can put on the same show as the Infinity. I've found the 10" Infinity can provide more tactile feedback than I'd even want! So maybe the shallow 12" drivers can do the job. I believe I can point the driver cone up in my chairs with the MBQuart, which may also help to get more tactile feel from the cone movement aimed right at my rear -- vs. the basket facing up on the Infinity.

https://www.sonicelectronix.com/item...oice-Coil.html

Best place to buy a Behringer NX3000D still Northern Sound and Light?







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post #1858 of 6616 Old 04-27-2019, 04:44 PM
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The Hideaway Theater

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Originally Posted by Archaea View Post
Attempting my dry run with a test subwoofer mounted directly to a chair.



Wowsers! Nearfield 18”s have NOTHING on this 10” Infinity mounted to the chair - as far as tactile response!!!



N O T H I N G!



I don't even have any rubber feet on these chairs!



Just ordered 4 shallow mount subwoofers. 3.07" mounting dept. The Infinity's I have are too deep at nearly 7". The chair recline mechanism can't work. The MBQuart drivers are the right price (10% off coupon TEN4U on the sonicelectronix website and free shipping) --- we'll see if they can put on the same show as the Infinity. I've found the 10" Infinity can provide more tactile feedback than I'd even want! So maybe the shallow 12" drivers can do the job. I believe I can point the driver cone up in my chairs with the MBQuart, which may also help to get more tactile feel from the cone movement aimed right at my rear -- vs. the basket on the Infinity.

https://www.sonicelectronix.com/item...oice-Coil.html



Best place to buy a Behringer NX3000D still Northern Sound and Light?

















I was sooooo hoping that somebody would do this. I did too, but didn’t want to sidetrack the thread.

I’ve been following this thread for a long time, and a long time ago, I lost the riser(Even as small as it would’ve been) battle to waf(it’s ok, I still have 7.3.4 in my LR lol). So I racked my brain for a plan B.
Anyway, I mounted a JBL driver from a pb12 to a baffle and mounted it to my couch. IT IS AWESOME. It’s much more natural than any MA’s I’ve encountered, and I love it. My subs are flat to 14hz, but being on concrete is very different the get good TR. so the driver in the couch is where I am at currently. It’s soo great.

To you guys that have built and used the BOSS, good on ya, I’m sure it’s really special, I hope to keep reading about new builds.
Maybe I’ll call mine the janitor.....hmmm. @trhought thanks for sharing your original design.
Archaea and trhought like this.

Last edited by Polyrythm1k; 04-27-2019 at 10:00 PM.
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post #1859 of 6616 Old 04-27-2019, 06:15 PM
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2 JBL 12" Subs - Check
8 Hudson Isolators - Check
Old AVR to drive the Subs (for now) - Check
4 x 8 sheet of 3/4 plywood - Check

Guess I should get started building something. I have to decide which way I am going to go. Should I mount the woofers directly to the chair as the previous poster did which is both easier and keeps the couch at the same height, or should I go with the full boss setup.

Thoughts?

Electronics: Denon X4400, Vizio M65
Sub: Rythmik FV18-PC x 2
Speakers: 3 x Chane A2.4 LCR, DIYSG Volt-6 Surrounds
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post #1860 of 6616 Old 04-27-2019, 08:08 PM
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Decent progress on my BOSS riser today, should get it finished tomorrow and will report back!
Note to self: pay attention to your toes when moving heavy subwoofers next time. SKHorn on big toe doesn't feel well.

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SKHorn Build
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