Bass Trapping in Separate Room - Connected to Main Listening Room - Page 2 - AVS Forum
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post #31 of 38 Old 06-08-2013, 05:01 PM - Thread Starter
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ThreeSUB.zip 315k .zip file
Alright - Got my third sub built....
The graph not as awesome as I expected. I literally tried every sub location combination I could think of while leaving the new end table sub where it's at. I am beginning to think I need to seriously figure out a way to re-arrange the furniture so I have a better seating position. I cannot imagine another location for a subwoofer. I tried all feasible corners, no corners, midwalls. I ended up with one sub in each front corner, and the side table sub. Tried turning off side table sub...didn't really help so I don't think its causing too much drama.
I attached the REW file so you can play with it. As you can see in the waterfall. It gets rid of a lot of the single frequency ringing, rather there is ringing over a large range.
I got lotso output now....gotta trap it up.
I cannot seem to get any progress with my panels...I have tried placing 4-6" ones in multiple different high pressure corners and not had much change on the graphs...starting to think I either need a LOT of treatment with those...not just a few corners.
Before+After and Audyssey On
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post #32 of 38 Old 06-10-2013, 05:29 PM
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Quote:
Originally Posted by Ethan Winer View Post

I don't think so. When I measured that, spreading a fixed amount of absorption around a room did a better job than using fewer thicker absorbers. Even at the lowest frequencies. Have you ever actually measured a room both ways?

--Ethan

What I meant was WRT your statement Chunk traps use three times more material, but absorb only a little more bass than 4-6 inch thick panels is that at very low frequencies, the difference between 4-6" material and say 10-15" thick material can be quite great.

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post #33 of 38 Old 06-11-2013, 11:45 AM
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Quote:
Originally Posted by jim19611961 View Post

at very low frequencies, the difference between 4-6" material and say 10-15" thick material can be quite great.

Yes and No. If you take all the material needed to build four 2-foot wide "chunk" traps from floor to ceiling in each wall-wall corner, and instead use that to make as many 4-inch thick panels as possible and cover more corner surface, the 4-inch thick panels will absorb more even at the lowest frequencies. Of course, for a fixed amount of surface area, thicker panels do absorb well to a lower frequency. But then you've used much more material.

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post #34 of 38 Old 06-11-2013, 12:26 PM
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Quote:
Originally Posted by Ethan Winer View Post

Yes and No. If you take all the material needed to build four 2-foot wide "chunk" traps from floor to ceiling in each wall-wall corner, and instead use that to make as many 4-inch thick panels as possible and cover more corner surface, the 4-inch thick panels will absorb more even at the lowest frequencies. Of course, for a fixed amount of surface area, thicker panels do absorb well to a lower frequency. But then you've used much more material.

--Ethan

I was thinking in terms of what works best, not how much material is used.

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post #35 of 38 Old 06-12-2013, 11:24 AM
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Quote:
Originally Posted by jim19611961 View Post

I was thinking in terms of what works best, not how much material is used.

Of course, but maybe I wasn't clear enough in my earlier post?
Quote:
Originally Posted by Ethan Winer View Post

Panels 4 to 6 inches thick do a great job, and that's a better use of a fixed amount of material. Chunk traps use three times more material, but absorb only a little more bass than 4-6 inch thick panels.

I added italics above for extra clarity.

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post #36 of 38 Old 06-12-2013, 11:55 AM
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Quote:
Originally Posted by Ethan Winer View Post

Of course, but maybe I wasn't clear enough in my earlier post?
I added italics above for extra clarity.

--Ethan

More clear, yes smile.gif

Still, unless one is exceptionally poor, I cant see why there would be a limitation of material in the first place though.

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post #37 of 38 Old 06-15-2013, 10:15 AM
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Originally Posted by jim19611961 View Post

Still, unless one is exceptionally poor, I cant see why there would be a limitation of material in the first place though.

You don't visit many forums do you. biggrin.gif

Seriously, a $200 - $400 difference is a lot of money for some people.

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post #38 of 38 Old 06-15-2013, 10:22 AM
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Quote:
Originally Posted by Ethan Winer View Post

You don't visit many forums do you. biggrin.gif

Seriously, a $200 - $400 difference is a lot of money for some people.

--Ethan

If your DIY'ing, the difference wont be that great (at $8 per OC703 2x24x48 panel), even less so if one is employing pink fluffy for trapping.

If your buying pre-made panels, then the difference could be thousands biggrin.gif

My Room
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Goldpoint Passive
(2) Classe CA-100 bridged power amps (350w)
Jenzen Next ( http://www.troelsgravesen.dk/Jenzen-NEXT.htm )
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