Ellis Family Retirement HT: Go big or go home - Page 48 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #471 of 855 Old 11-26-14, 03:18 PM Thread Starter
 
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Re: Ellis Family Retirement HT: Go big or go home

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Yes. Just fine the reflections for the center 2 channel seat and treat those with diffusion. Get something that's going to get down reasonably low. A 6" thick diffuser should get down to around 300Hz.
Sounds good... I have some old plans for the RPG QRD type diffusers... I am assuming that would be better than the RPG SkyLine type?

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post #472 of 855 Old 11-26-14, 03:28 PM
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Re: Ellis Family Retirement HT: Go big or go home

Skylines are a QRD type design. They're just not deep enough for what we want to do. Plan on at least 6" deep.

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post #473 of 855 Old 11-26-14, 03:59 PM
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Re: Ellis Family Retirement HT: Go big or go home

It would be great if you could post those plans or do a build thread. Haven't seen much on diffusor builds & I'm more than likey going to need them (or a reasonable faximily) in my room as well.
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post #474 of 855 Old 11-26-14, 07:59 PM
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Re: Ellis Family Retirement HT: Go big or go home

2nd this - I have been looking at building some too. They look very tedious to make
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post #475 of 855 Old 11-26-14, 08:24 PM Thread Starter
 
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Re: Ellis Family Retirement HT: Go big or go home

Years ago I made two of them 4' x 4', and I really liked them. This time i will most likely do them in 2' x 2', and then cover them with black Acoustically Transparent GOM.

These are the ones I purchased... http://www.acousticfields.com/produc...atic-diffusor/ (I am not sure about posting ones that were purchased... Plus they are pretty inexpensive).

Here are some free ones... http://arqen.com/sound-diffusers/

Here is a calculator... http://arqen.com/sound-diffusers/

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post #476 of 855 Old 11-27-14, 08:43 AM
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Re: Ellis Family Retirement HT: Go big or go home

Be very careful. All of those designs are symmetric patterns. Repeating symmetric patterns next to each other can cause comb filtering. If your requirements are to have 2 diffusers next to each other then they need to be asymmetric and the pair needs to be hung mirror imaged to each other.

The plans from Argen are only 50-60mm deep so not much good below about 7-800hz.

Try QRDude to design your own

http://www.hometheatershack.com/foru...alculator.html

Pay attention to the 'rules' it checks against.

I am serious... and don't call me Shirley.

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post #477 of 855 Old 11-27-14, 10:48 AM Thread Starter
 
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Re: Ellis Family Retirement HT: Go big or go home

Quote:
bpape wrote: View Post
Be very careful. All of those designs are symmetric patterns. Repeating symmetric patterns next to each other can cause comb filtering. If your requirements are to have 2 diffusers next to each other then they need to be asymmetric and the pair needs to be hung mirror imaged to each other.

The plans from Argen are only 50-60mm deep so not much good below about 7-800hz.

Try QRDude to design your own

http://www.hometheatershack.com/foru...alculator.html

Pay attention to the 'rules' it checks against.
Thanks Bryan, I will look at QRDude and design my own.

Ron

My Home Theater
BenQ MH741 Projector, Yamaha CX-A5100, (2 pr) JBL 8340As, (2 pr) JBL 8320s, PS3, XBox One, (1) Asus Mini, Redmere HDMI cables, Monster Signature HTPS7000, (2) Furman Power Conditioners, (2) DTS-10 subs, SeymourAV 180 (195" diag) scope screen, Darbee Darcet,Yamaha P7000s, Oppo UDP-203

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post #478 of 855 Old 11-27-14, 11:07 AM Thread Starter
 
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Question Re: Ellis Family Retirement HT: Go big or go home

It looks like , if I can cover them with AT GOM, I can go a max of 10" deep per side (using the Diffusers as a masking panel too). Since I am as large as I can possible go already due to no more room to move the projector back... The only way I could go larger would be to move my Rack (which would be a major rework). Should I go the max depth I can? 10" will give me down to 226Hz, where as 8" will give me 283Hz.

Ron

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post #479 of 855 Old 11-27-14, 11:14 AM
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Re: Ellis Family Retirement HT: Go big or go home

Masking panels on the front wall? You want absorption there. The diffusion was for side wall reflections.

I am serious... and don't call me Shirley.

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post #480 of 855 Old 11-27-14, 02:33 PM Thread Starter
 
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Re: Ellis Family Retirement HT: Go big or go home

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Masking panels on the front wall? You want absorption there. The diffusion was for side wall reflections.
The panels will be for first reflection mounted on the side walls but the thickness of them will be doing a double duty as masking the screen or in other wards making a side boarder for the front screen.

Like this...
Attached Thumbnails
Ellis Family Retirement HT: Go big or go home-screen-drawing.png  


Ron

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