Dip at 75hz....need to build a membrane trap? - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 14 Old 06-18-12, 10:03 AM
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Re: Dip at 75hz....need to build a membrane trap?

Think more centered behind you rather than the corner probably. Use something at least 6-8" thick.

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post #12 of 14 Old 06-18-12, 11:06 AM Thread Starter
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Re: Dip at 75hz....need to build a membrane trap?

Quote:
bpape wrote: View Post
Think more centered behind you rather than the corner probably. Use something at least 6-8" thick.
I may have the perfect place! Unlike the room layout image I posted, that "curtain" behind me is actually two windows with blinds. BETWEEN THEM I have a wrapped 705 panel that is only 1.5" thick (but spaced off the wall about 1.5") at about 36"w x 44"h set on a waist-high bookshelf. I could easily add some more slabs of 705 to the back of this and make it 6-8" thick as u suggested. I could also technically make it taller but I couldn't really make it any wider.

I'll try to take a picture of this rear wall with the current 1.5" panel later this evening.

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post #13 of 14 Old 09-26-12, 08:26 PM Thread Starter
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Re: Dip at 75hz....need to build a membrane trap?

Popping back in here...gonna build a 6-8" slab this weekend.

One concern though, based on this pic of my back wall, is the area just TOO NARROW?





That 1.5" panel was just there to stop first reflections, as its about 10' behind my head. I can't make it any wider, but I can definitely make it THICKER and TALLER. The tops of those windows are actually about 10' up. The walls continue another 2' to the ceiling.

So would it be worth it to fatten up that trap on the back wall, seeing as how its relatively narrow? Make it go to the ceiling maybe?

Here's my floor plan again...again, the curtain is inaccurate, its not one long complete wall.



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post #14 of 14 Old 09-27-12, 07:31 AM
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Re: Dip at 75hz....need to build a membrane trap?

Can't hurt. Not sure if you'll have enough surface area to be fully effective but it will still help the overall decay time in the room. I would look at a bare minimum of 6" thick. Thicker and/or spacing off the wall will help extend the reach farther.

Bryan

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