[fireanimal]

Also forgot to add the side walls will have sound treatment to help with the reflections.

 

[mwmkravchenko]

There are other ways to.

Angled front wall. That kills a couple stones with one bird.

 

[fireanimal]

Riser Subs in Place, and started on sound treatment panels.

 

[fireanimal]

Rear surround towers in place, including flanking subs. Should be some good corner loading.

 

[Prof.]

You may have to isolate those surrounds from the subs with some dampening material, otherwise they could get bounced around on top of the subs from the vibrations..

 

[fireanimal]

Yes they will actually be screwed down. Thanks for keeping on my feet!

 

[mwmkravchenko]

I like the french cleats on the absorption panels.

An old cabinet makers technique.

 

[fireanimal]

Yes and they hold extremely well. Also easy to get on and off.

 

[mwmkravchenko]

True, very true.

 

[fireanimal]

Redesigned the Front ULF subs, they will now be the same as the riser subs, and located under the screen riser.

Also added the rest of my sound treatment panels, rear bass corner traps, and Roxul AFB 1" behind the screen on the wall.

Update on the sub design, I am working with some CNC guys on getting all the panels cutout, as there are a lot of cuts to make.

 

[mwmkravchenko]

Making sacrificial corners from the rigid Roxul?

Try listening in room before you go through all that work.

That will not actually tame much bass. Lots of low midrange but not much bass.

 

[fireanimal]

Yes true on the low bass, but very easy to do, just cut into wedges, I have the Roxul already, and did the same in my last theater room http://www.hometheatershack.com/forums/home-audio-acoustics/10857-help-room-accoustics.html , and seemed to help overall I think....:scratch:

 

[mwmkravchenko]

Hard to argue with experience.

You did some measurements I see.

Befores and afters would be most interesting.

I'm guessing you still have the same gear.

The new room should be just as interesting.

 

[fireanimal]

Moderator if you have a chance can you change my thread titile please to

Horn Sub Input Please - Build In Progress!

Thanks!

 

[fireanimal]

Got all my parts from the CNC machinest a couple weeks ago but have not had a chance to update. Construction was fairly straight forward, and I am so glad I decided to have all the parts CNC'd as there would have been a lot of cuts.

3000 staples, and 20 tubes of PL premium later....

Will get some in room measurments posted shortly.:hsd:

 

[mwmkravchenko]

So starts the fun.

You are one of a very few that have the fabled unobtanium in the low end. No limits.

No compromises, or music or sound effects that you cannot reproduce.

And for very little outlay in money.

That has to be the pinnacle of DIY!

 

[fireanimal]

Yes for sure,

AND thanks a million to Mark for his guidence during the design process!!:T

Total construction cost including drivers, wood, CNC, connectors, staples and glue.......$271.16 per speaker!

Awesome value I think

 

[mwmkravchenko]

All I did was throw you a pass, your the one that ran the play.

Great to see a job well done.

 

[Prof.]

Man..that's a lot of cabinet work!..Well done! :T
They should sound awesome..

 

[fireanimal]

As promised here are the measurments;

The first is a 1 watt sweep to measure the in room sensitivity of the 6 ULF subs, the room is bare, only subs installed. This was done with a 200hz crossover.

The second is power compression sweeps to check for headroom, neither the amp or drivers gave out.....Only myself and my house said it was enough. These were done with a 80hz crossover.

To verify 1 watt, I loaded my amp with my calibration resistors and checked the output voltage with my picoscope, also I calibrated my spl meter agaist my ascend cmt-340se @ 1 meter, which was also fed 1 watt. Voltage to the ULF subs was 2.31 vrms @ 5.33ohm and cmt-340se was 2.83 vrms @ 8 ohm

The measurements where taken dead center of the room @ a height of 4 feet.

Also I am using a calibrated microphone with no smoothing applied.