"The Bonecrusher" - AVS Forum
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post #1 of 33 Old 06-29-2010, 02:39 PM - Thread Starter
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My latest build is a variation of John's new AE PR cabinets.

Right now it houses a pair of Dayton Reference 15" subs and a quad of Kevin's Exodus PR-18's tuned to 8.55 hz. I will be ordering another AV15 shortly to mate with another one I have and then run the pair of AE's in place of the Daytons.

The enclosure is constructed entirely of double 3/4 mdf. The inner dimensions are 49 x 18 3/8 x 25. The vertical round over was done with a 1.25 bit The finish is roll on bedliner , a departure from all the veneer I have done lately.

No measurements yet but modeling shows @ 118db at 20 hz.




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post #2 of 33 Old 06-29-2010, 02:43 PM
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Nice! It didn't seem to be as large as it was until I realised those were 15's.

Pretty low tune on that sucker. How much weight do you have on those? Did you mean to type 18.5hz instead of 8.55hz?

My Dual 18" LLT subs 120dB down to 10hz

 

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post #3 of 33 Old 06-29-2010, 02:46 PM - Thread Starter
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Scott , this thing is BIG . Not on my pc right this second but the pr's are tuned to 8.55 or so with @ 1800 grams on each. This is going by what bassbox calculates . Im not sure how accurate it is on pr enclosure tuning.

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post #4 of 33 Old 06-29-2010, 05:13 PM
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I get an F3 ~20hz at 116dB, with xmax limited at 26Hz. Sound about the same?

The PRs Fs is lowered to ~8Hz. The enclosure is tuned to ~17Hz.
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post #5 of 33 Old 06-29-2010, 08:11 PM
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Damn....very nice....how do they sound/measure?

FWIW, I think that the Reference HF 15s are some of the best value drivers out there....

JSS
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post #6 of 33 Old 06-29-2010, 08:46 PM
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Reminds me of an enclosure I have unused in my garage except it's oak and was using dual HE 15s that were opposing and 4) 18" PRs.
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post #7 of 33 Old 06-29-2010, 10:37 PM - Thread Starter
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Quote:
Originally Posted by soho54 View Post

I get an F3 ~20hz at 116dB, with xmax limited at 26Hz. Sound about the same?

My model shows just below 17 hz.

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post #8 of 33 Old 06-29-2010, 10:40 PM - Thread Starter
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Maxmercy ,

I havent done any measurements yet but it sounds good to me.
WOTW on blu-ray was the first thing I threw at it.

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post #9 of 33 Old 06-29-2010, 11:54 PM
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Like Scott, I didn't think they looked all that big, until I saw the Mini Statements behind.

Nice work.
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post #10 of 33 Old 06-30-2010, 04:55 AM - Thread Starter
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Quote:
Originally Posted by A9X-308 View Post

Like Scott, I didn't think they looked all that big, until I saw the Mini Statements behind.

Nice work.


Thanks , I think the color makes it look smaller than it actually is.

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post #11 of 33 Old 06-30-2010, 06:13 AM
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Quote:
Originally Posted by Rightbrained View Post

Thanks , I think the color makes it look smaller than it actually is.

The big indicator for me was how small the mini-statements were behind it.

Also I spy a sealed 15 in the background, did you ditch the THT that was on the right side of your speakers?
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post #12 of 33 Old 06-30-2010, 06:22 AM - Thread Starter
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I gave the THT to a friend who needed a sub and didnt have money to buy or build one.

Of course the diy bug bites me so often I needed an excuse to build a new toy anyway lol.

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post #13 of 33 Old 06-30-2010, 04:22 PM
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Rightbrained, good job with that sub build! How much power are you using? Did you use any braces for the enclosure? Did you add any polyfill material to that enclosure? How does it compare to the THT? You've had ported, sealed and PR subs, which one did you like best? Adding the AE's subs to that enclosure should improve the performance a bit, I would think.
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post #14 of 33 Old 06-30-2010, 05:09 PM - Thread Starter
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Hey Spanish,
You know me man , I just cant stop building .

Right now I am only running around 1000 watts. There is minimal bracing at the center of the cabinet. I honestly think the cabinet would be fine without any bracing considering it is 1.5" thick . There is no polyfil in the enclosure right now. Once I get the other AV15 I will play around with different weights and levels of fill .

I still prefer sealed subs when properly eq'd and when provided ample power.

I dont have any measurements of The Bonecrusher yet but it seems the THT is louder but doesnt extend as deep.

Hopefully in a month or so I can take measurements with the AV15's and the new Face amp I have coming.

If at first you dont succeed , get a bigger hammer !
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post #15 of 33 Old 07-01-2010, 06:09 AM
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So how deep does it go(as in do you have any modeling graphs)? I love my THT because of the high SPL it produces but I don't like it because it drops like a rock at 20hz.
I really want a 15hz horn and I will probably build that 2x JBL GTO horn.
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post #16 of 33 Old 07-01-2010, 06:14 AM - Thread Starter
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I am at work right now , so no graphs on my phone. If I remember correctly the models show good output @ 15 with the dayton reference drivers.

If at first you dont succeed , get a bigger hammer !
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post #17 of 33 Old 07-01-2010, 07:47 AM
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Quote:
Originally Posted by stgdz View Post

So how deep does it go(as in do you have any modeling graphs)? I love my THT because of the high SPL it produces but I don't like it because it drops like a rock at 20hz.
I really want a 15hz horn and I will probably build that 2x JBL GTO horn.

What is a JBL GTO Horn?
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post #18 of 33 Old 07-01-2010, 08:10 AM
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Quote:
Originally Posted by Tom Bley View Post

What is a JBL GTO Horn?

http://www.diyaudio.com/forums/subwo...n-2x12-th.html

A bunch of people have talked about it but no one has built one
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post #19 of 33 Old 07-01-2010, 08:17 AM
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Quote:
Originally Posted by stgdz View Post

http://www.diyaudio.com/forums/subwo...n-2x12-th.html

A bunch of people have talked about it but no one has built one

Cool! Thanks.
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post #20 of 33 Old 07-01-2010, 06:26 PM
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Interesting design--reaches deep and is pretty flat to boot. But the claimed SPL seems a bit optimistic (the hornresp jpg values posted gives a much lower value) and the impulse response is choppy as all getout. Pretty severe ringing.

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post #21 of 33 Old 07-01-2010, 07:32 PM
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How does it compare to the DTS-10?

War Eagle!
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post #22 of 33 Old 07-21-2010, 09:09 AM - Thread Starter
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Every now and then we do something we regret. One of those things for me was selling one of my AV15X's last year.
The good news is that the buyer just sold it back to me.
Next week I will have The Bonecrusher running with the drivers I designed it for.

If at first you dont succeed , get a bigger hammer !
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post #23 of 33 Old 07-21-2010, 09:27 AM
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I'd like to see that!

Man, if I had any AE drivers I would hold onto them like grim death. Good thing you are getting yours back.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #24 of 33 Old 07-21-2010, 09:31 AM - Thread Starter
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No kidding Scott, it was a boneheaded move. Thankfully I was able to reverse that mistake.

If at first you dont succeed , get a bigger hammer !
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post #25 of 33 Old 07-21-2010, 10:24 PM
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that looks awesome! total costs?
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post #26 of 33 Old 07-22-2010, 05:22 AM - Thread Starter
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Total cost as it sits right now with the Dayton drivers and second hand passive radiators is @ $650 .

If at first you dont succeed , get a bigger hammer !
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post #27 of 33 Old 07-25-2010, 02:37 AM
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Quote:
Originally Posted by Rightbrained View Post

Total cost as it sits right now with the Dayton drivers and second hand passive radiators is @ $650 .


I'll give ya $700 for it.
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post #28 of 33 Old 07-25-2010, 03:58 AM - Thread Starter
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Yeah? You going to drive to southeast Alabama to pick it up?

If at first you dont succeed , get a bigger hammer !
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post #29 of 33 Old 07-25-2010, 04:00 AM - Thread Starter
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Hey edogg,
Bring me an LMS Ultra and we will call it even.

If at first you dont succeed , get a bigger hammer !
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post #30 of 33 Old 07-25-2010, 11:16 AM
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Quote:
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Hey edogg,
Bring me an LMS Ultra and we will call it even.

Lol. Let me think about it.
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