the HouseWrecker. 11hz Twin CVX-15 Tapped Horn - AVS Forum
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post #1 of 420 Old 12-27-2010, 11:52 AM - Thread Starter
 
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Ok.

Thought I'd share a couple teaser pix of something fun I've been workin on recently.... Some of you may remember me from waaaay back. (theBeast MK-I, through Mk-IV - dr. Bass / etc).

As I am no longer affiliated professionally with TCS/Klipsch/B-52 Pro/AE Speakers- etc... and am now the 'senior acoustic' over at Kicker, I decided it was high time to start sporting some true blue Kicker. Well - that and share some fun stuff with my co-workers, friends, and show what a couple worthy woofers can do in a ULF Tapped Horn Subwoofer....... (We won't get to the Main speakers till later - but 120dB per tower capabillity L/C/R's flat from 28-21khz with phenominal power and polar response sure make for a fun system.. )

Tom Danley has always been a good friend (from distance) dating back to the old Servo Drive / Contra Bass days.. I respect his ability to think outside of the box and create magic with Bass. His DTS-10 Super Spud project was the kick off point for this little project. This is um..... Just an amplification of (and take off from) the DTS-10 Super Spud -and all the ensuing more and more popular tapped horn subwoofers.

Not yet having become competent with HornResponse / folding bass horns.... I cast about looking for someone who might be the perfect partner in crime to share in undertaking this project...

Enter Lil-Mike. I'm more than sure ya'll are familiar with him - he is a fantastic good human, and a wizard in HR to boot. The credit for the folding and tuning of this project rests solely on his shoulders - we've been back and forth at this for likely 6 months now. This is the most complex - craziest fold, highest performance tapped horn design he's been involved with yet.....

And so ya know - I am getting Excited. 'Modeled' we would need more than 6 of theBeast MK-IV's (You know - the double 18" actives, quad 18" passives..) to meet the performance of this below 14hz.... 4 of theBeast MK-I's at 16hz. I'm not going to even speculate above that....

Anyway - what follows are a glimpse of the project - where it sits today. I didn't want to start a thread till I was close to making noise with it. What we have here, is a....... BIG tapped horn. I have the luxury of having a Garage wall be the opposite side of my living room / HT (yes by design....).

The main body will live on the garrage side of the wall - with a cutout / and manifold projecting through to the living room. The last expansion will house the manifold, and live in the corner of the livingroom. I've already measured the manifold location v/s everywhere else in the room - and it's a great spot for the ULF.

You should be able to get the gist with the photo's. We will update pretty regularly as I make progress... Please feel free to pester either me or Lil mike with Questions. Prior to final assembly - I willl try to get it outside and do some ground plane real world measurements.

I have 156' between my garage and my neighbors with smooth driveways facing each other- with a 25' residential street between - we should be able to do 10M measurements no problem with resolution to ~~ 10hz with decent accuracy..

Anyway. 2.83V into the twin CVX-15's models at 90dB Spl 1m g.p. @20hz! 89.43dB 1m g.p. at 12hz............. Remember these are just the model. I won't even begin to speculate as to what..... peak SPL numbers.... or real world measurements will be till I have them measured and posted..

So far Lil-Mikes HR models predict Reality pretty well though.... In this case, the house will definitely be the limiting factor...

 

Double CVX-15 Tapped Horn 2.83V model - 2 pi 1 m.pdf 27.10546875k . file
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post #2 of 420 Old 12-27-2010, 11:55 AM - Thread Starter
 
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more pix
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post #3 of 420 Old 12-27-2010, 12:03 PM
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oh titties cant wait to see sum pics with driver macked up in there
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post #4 of 420 Old 12-27-2010, 12:04 PM
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Been waiting for this one. Tapped horn coffins FTW
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post #5 of 420 Old 12-27-2010, 12:16 PM - Thread Starter
 
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More pix
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post #6 of 420 Old 12-27-2010, 12:19 PM
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And so it begins.....

Looks great so far! I'll post up the model as soon as I can.

Testing is gonna be interesting. dB has forgotten more about measuring speakers than most of us know, and he can throw some serious gear at it.

Coolest part? He can hand out business cards when the cops come....
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post #7 of 420 Old 12-27-2010, 12:27 PM
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Holy cow! This is going to be fun.

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post #8 of 420 Old 12-27-2010, 12:31 PM
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That is an interesting fold for sure.

The driver seem to have a lot going right for it. A dual driver 14Hz version seems like an easily worth while build. Depending on the xmax/xmech numbers.
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post #9 of 420 Old 12-27-2010, 12:33 PM
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post #10 of 420 Old 12-27-2010, 01:06 PM - Thread Starter
 
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Howdy SoHo.

Driver parameters are attached.

I worked HARD to bring SPLo up for the 2010 CVX line up.

Ended up using Aerated PP to reduce mass. They have decent throw. X-linear / X-Mech are... 17.4mm ( @< 1% BL deviation.. <10% deviation is ~~ >25mm 1 way..) and 36mm X-Peak. I'll double check that last number at work tomorrow..... (Corrected..).

Not the worlds wildest woofers - but def a step up from the standard DTS 12" fair. They will be fun to play with in an 11hz tapped horn for sure.

 

2010 CVX 154 P3.txt 0.671875k . file

 

finalcvx.txt 0.453125k . file
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post #11 of 420 Old 12-27-2010, 01:28 PM
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i don't understand the fold. where does the drive go?

Listen. It's All Good.
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post #12 of 420 Old 12-27-2010, 01:36 PM
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Using this pic:


The Drivers are attached in a manifold configuration. They are in the top of the last section of the horn which is in-room. They feed though the wall in the first horn section which is vertically positioned, and it is then switched off to the rest of the horn in the garage with a 90deg shift.
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post #13 of 420 Old 12-27-2010, 01:42 PM
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roger soho.

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post #14 of 420 Old 12-27-2010, 01:52 PM
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Quote:
Originally Posted by lilmike View Post

Looks great so far! I'll post up the model as soon as I can.

You have an AkAbak script of this, right?

Quote:
Originally Posted by dB-Kicker View Post

They have decent throw. X-linear / X-Mech are... 17.4mm ( @< 1% BL deviation.. <10% deviation is ~~ >25mm 1 way..) and ~~40mm X-Peak. I'll double check that last number at work tomorrow.....

That's not bad at all.
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post #15 of 420 Old 12-27-2010, 02:06 PM
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Quote:
Originally Posted by dB-Kicker View Post

Howdy SoHo.

Driver parameters are attached.

I worked HARD to bring SPLo up for the 2010 CVX line up.

Ended up using Aerated PP to reduce mass. They have decent throw. X-linear / X-Mech are... 17.4mm ( @< 1% BL deviation.. <10% deviation is ~~ >25mm 1 way..) and ~~40mm X-Peak. I'll double check that last number at work tomorrow.....

Not the worlds wildest woofers - but def a step up from the DTS fair. They will be fun to play with in an 11hz tapped horn for sure.

why couldnt this have been back when i was die hard Kicker

beautiful numbers there
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post #16 of 420 Old 12-27-2010, 03:39 PM - Thread Starter
 
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Quote:
Originally Posted by soho54 View Post

You have an AkAbak script of this, right?

That's not bad at all.



Dunno if he has an AKABAK of it - but the HR model should be attached to my first or second post. "finalcvx.txt."
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post #17 of 420 Old 12-27-2010, 03:46 PM - Thread Starter
 
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Quote:
Originally Posted by LTD02 View Post

i don't understand the fold. where does the drive go?

Maybe these will help..
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post #18 of 420 Old 12-27-2010, 03:58 PM
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Damn......this should ROCK. Plans for a highpass, or not necessary?

JSS
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post #19 of 420 Old 12-27-2010, 03:59 PM
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Quote:
Originally Posted by dB-Kicker View Post

Dunno if he has an AKABAK of it - but the HR model should be attached to my first or second post. "finalcvx.txt."

The PDF in your first post has the HR inputs in it. That's were I pulled the driver info as well.

If he doesn't have one, I would like to do one for my own curiosity. Those 3d shoots have a Sketch-Up feel to them. If so, I would like to run a script from them, assuming you don't mind posting the skp.
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post #20 of 420 Old 12-27-2010, 04:05 PM
 
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What are the exterior measurements?
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post #21 of 420 Old 12-27-2010, 04:17 PM
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From the dumb side of the peanut gallery, is there a backwave going into the garage?

It is not "open-minded" to reject knowledge - Bob Lee
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post #22 of 420 Old 12-27-2010, 04:25 PM
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holy crap!! You should build 2 of them!
Why build one when for double the price, you can build two!!!

Blasting brown notes for 10 years and counting!

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post #23 of 420 Old 12-27-2010, 04:26 PM
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N8 ,
I think you should build three !

If at first you dont succeed , get a bigger hammer !
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post #24 of 420 Old 12-27-2010, 04:46 PM - Thread Starter
 
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Quote:
Originally Posted by soho54 View Post

The PDF in your first post has the HR inputs in it. That's were I pulled the driver info as well.

If he doesn't have one, I would like to do one for my own curiosity. Those 3d shoots have a Sketch-Up feel to them. If so, I would like to run a script from them, assuming you don't mind posting the skp.

I had tried to attach the skp before. I wil try again. Keeps saying "invalid file" every time I try to upload.
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post #25 of 420 Old 12-27-2010, 04:57 PM
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Quote:
Originally Posted by dB-Kicker View Post

I had tried to attach the skp before. I wil try again. Keeps saying "invalid file" every time I try to upload.

You have to place it in a zip file to compress it. It has to be under 500KB through.

If it is already under 585.9 KB you can just change the .spk extension to .bmp, and upload it that way. Just let everyone know you have to change it back to .skb after downloading.
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post #26 of 420 Old 12-27-2010, 04:58 PM - Thread Starter
 
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Quote:
Originally Posted by TestWork View Post

What are the exterior measurements?

Big. Really Big. Lil-Mike kinda likened it to a nitrous injected Big Block with serious heads / carbs / etc - compared to a DTS as say - no power adder small block. Err. That isn't the exact analogy. Another would have been say compare a DTS-10 to a .357 magnum. this one more like a .44 magnum - or maybe even a desert eagle .50.

It is NOT SMALL. And it doesn't have to be - it's mine.

Anyway, roughly ~~ 90" x 50" x 22.25" on the garage side. HR model gives ~~ 1510L total.
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post #27 of 420 Old 12-27-2010, 04:59 PM - Thread Starter
 
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Quote:
Originally Posted by penngray View Post

From the dumb side of the peanut gallery, is there a backwave going into the garage?

Hi Penney - No. Just the biggest part of the sub lives outside. Through hole will couple it to inside last piece of the expansion.
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post #28 of 420 Old 12-27-2010, 05:02 PM - Thread Starter
 
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Quote:
Originally Posted by soho54 View Post
You have to place it in a zip file to compress it. It has to be under 500KB through.

If it is already under 585.9 KB you can just change the .spk extension to .bmp, and upload it that way. Just let everyone know you have to change it back to .skb after downloading.
Looks like I got it. here's the last fold variant.

 

Final Garage side layout.zip 27.212890625k . file
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post #29 of 420 Old 12-27-2010, 05:05 PM
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Quote:
Originally Posted by penngray View Post

From the dumb side of the peanut gallery, is there a backwave going into the garage?

Well, yeah....sort of....it goes into the garage side of the tapped horn.

The tapped horn (mouth and throat) is punched through a wall. The throat mates with the remainder of the flare (in the garage), then opens below the manifold into the room. The manifold is covered by the remainder of the flare (L45 in this case)

It is a little warped. This is way more than just a port through the wall, we pulled the whole horn through the wall. Drivers stay in the heated portion of the house, it makes for easier wiring, but dB can hide something like 1000 liters of horn in the garage.

dB's nuts enough to build this, and has the knowhow to get it done, so I figured I'd give it a go on the design side.
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post #30 of 420 Old 12-27-2010, 05:10 PM
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Quote:
Originally Posted by soho54 View Post

The PDF in your first post has the HR inputs in it. That's were I pulled the driver info as well.

If he doesn't have one, I would like to do one for my own curiosity. Those 3d shoots have a Sketch-Up feel to them. If so, I would like to run a script from them, assuming you don't mind posting the skp.

Nothing current in akabak. Did some early stuff on this project as a sanity check, but I got where I wanted with Hornresp after the recent round of updates. Past few revisions have been nice steps in the right direction. The model should accurately reflect what I folded (at least when I calculate the path lengths.... ).

Though the bulk of it is literally 4 boards, the garage flare of this one took me a good while to fold. Sometimes the stuff that looks simplest isn't.
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