dB HT

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dB HT

Postby dB » Tue Mar 01, 2011 11:19 pm

So. Finally have the dB HT up and running - sans a subwoofer. Denon AVR 3311ci as the head unit. Mains are still passive - finishing the amps next Monday to go full active with DSP.

L/C/R In Room SPL measurements with 2nd and 3rd harmonics - NO room treatment - including ALL room reflections. Mic at listening location in front of couch pillow, speaker 4.5 meters away.

http://a1.sphotos.ak.fbcdn.net/hphotos- ... 2608_n.jpg

http://a7.sphotos.ak.fbcdn.net/hphotos- ... 0744_n.jpg

http://a6.sphotos.ak.fbcdn.net/hphotos- ... 7043_n.jpg

http://a4.sphotos.ak.fbcdn.net/hphotos- ... 1246_n.jpg

http://a2.sphotos.ak.fbcdn.net/hphotos- ... 8389_n.jpg (this last is with 75 watts)

The speakers (behind my baby gate). Drivers have been previously posted.

http://a7.sphotos.ak.fbcdn.net/hphotos- ... 3106_n.jpg

Wish me luck with theHouseWrecker:

http://a4.sphotos.ak.fbcdn.net/hphotos- ... 5358_n.jpg

http://a3.sphotos.ak.fbcdn.net/hphotos- ... 5007_n.jpg

http://a6.sphotos.ak.fbcdn.net/hphotos- ... 9269_n.jpg

http://a5.sphotos.ak.fbcdn.net/hphotos- ... 1814_n.jpg

http://a5.sphotos.ak.fbcdn.net/hphotos- ... 9033_n.jpg

http://a3.sphotos.ak.fbcdn.net/hphotos- ... 0442_n.jpg

I have a thread here with all its details:

http://www.avsforum.com/avs-vb/showthread.php?t=1301534
'
if you want more pix - friend me on FB. Put "From DIY Speakers" in the request.

This should be my FB..

http://www.facebook.com/album.php?aid=2 ... 0354278147
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dB
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Location: So-Cal

Re: dB HT

Postby DVDdoug » Wed Mar 02, 2011 7:47 pm

I love it! I've always loved BIG speakers!
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Re: dB HT

Postby dB » Thu Mar 03, 2011 11:29 pm

These are what came of theBasslist HT I was working on. No i just need to finish up that tapped horn sub - and make it all look purdey.
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dB
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Re: dB HT

Postby llung » Fri Mar 04, 2011 2:50 am

Impressive!
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Re: dB HT

Postby dB » Fri Aug 17, 2012 7:37 pm

Thought I'd update the pix.

FYI if I hadn't mentioned it before. I designed everything in this system to completely destroy Kripsch's THX Ultra2 loudspeakers. The mids have 2x the throw of those, at the same sensitivity - and worlds better distortion. the horn has no diffraction slot, is tractrix roughly 55 x 85 or so and sounds Awesome. Woofers, well - THX U2's with 10" long throw woofers? heh..

I got tired of looking for the perfect mid for the DIY THXUtoo speaker project - and had the opportunity come up at work to design my own. As it happens - these meet and (hugely) excede THX UltraToo specs in every way but impedance... These are probably the best home theater speakers I've had the pleasure of hearing. Ever. 8-)

The system is growing UE-PC and will go full active in the next few weeks.. And one of the two HouseWreckers have been built.

Image

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Image

Image

Image

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Image

theHouseWrecker is not shown in these photo's. The paint on thse speakers is the paint from my mustang. tungsten Grey stripe, and black. Both actually from painting my car :)

If the drivers didn't cost so derned much to the consumer - I'd do a network up for you guys that met the letter of THX law.... :(
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dB
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Re: dB HT

Postby Brian Steele » Fri Aug 17, 2012 8:12 pm

Nice work! Interesting choice of what seems to be 10" Kicker Comps for the bass drivers. Any particular reason why you went WMTMW rather than MTMWW?
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Re: dB HT

Postby PhilK » Fri Aug 17, 2012 8:30 pm

Deon-

Thanks for the update. My financial situaion is finally above desparate so maybe I can FINALLY make those HT speakers I have been thinking about
since I saw the Audax plans many years ago. Don't know about the paint job, though.

Nice to see some action on the board though I have been just an observer in recent years.

- Phil
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Re: dB HT

Postby JohnH » Tue Aug 21, 2012 9:09 pm

Hi Deon,
When I opened the picture, the first word out of my mouth was "Wow". They look amazing, Deon.
John
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Re: dB HT

Postby llung » Wed Aug 22, 2012 1:40 am

Another WOW! from me.
I'll be cleaning up the drool on my keyboard for days.
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Re: dB HT

Postby dB » Fri Mar 15, 2013 4:42 pm

Thanks for the nice words fella's! Apologies I hadn't been here in a while to see responses..

Brian Steele wrote:Nice work! Interesting choice of what seems to be 10" Kicker Comps for the bass drivers. Any particular reason why you went WMTMW rather than MTMWW?


Woofers are CVX's. WMTMW placed horn on ear axis - and helped to spread the vertical room modes. It also kept L/R tweeter aparant acoustic center height closer to the center speakers.. Works very well - there is zero acoustic discontinuity with pans from L through C to R.

Image

Well, thats what they look like in use anyway.. 120 plus dB per each tower. Makes for some raucous movies

Image

F/R measured In Room. Microphone placed on the pillow behind my head. 4.5 meters from the right speaker..

Image

Here are crossover curves.. Nice and phase coherent - and they use all of the horns pattern control.

Image

That measurement is 3 meters out. Inside our warehouse (20/30' ceilings?). Includes reflections. Curves are 0, 5, 10, 15, 30, and 45 degree's off axis to the Mid side.. (Is why they have horns on outside)

They now have Tapped Horns to supplement the CVX's. Over 120dB at the listening position from ~~15hz on up ;)

Image

I may post up a little more info tonight. On lunch break at moment - gotta bolt..


Edited by dB-Kicker - 1/25/13 at 10:56pm
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