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Post by Hexspa on May 24, 2016 8:41:00 GMT
Hey, Composerken. ...and the award for sickest monitor stands goes to.. Looks great man. Spec-wise, your bass is a little deviant and the highs seem to roll off above 800Hz. Plus your decay is a bit long from 40-200Hz. I think building more corner absorption should help. Also, you can measure your sub's response separately from your monitors' response and place them so their curves balance one another out. Here's a link: www.hifizine.com/2011/09/bass-integration-guide-part-2/Good improvement, though. Keep at it. -m
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Post by Ethan Winer on May 24, 2016 17:33:14 GMT
Very nice! My only comment about your graphs is that you'll only benefit from more bass traps.
--Ethan
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Post by starandchlorisse on May 24, 2016 20:43:07 GMT
Your room looks very nice - congrats !
Since you have so good skills you could also treat 3 more places - ideally
1. The entire celling with the thickest possible bass traps you can afford even with some space between the traps and the celling 2. The real wall - every corner needs a bass trap above and below the diffusere 3. Behind or under your office or at your sides of your office you could put bass traps if you can make them without causing major inconvenience Great job again
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Post by composerken on May 24, 2016 22:36:16 GMT
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Post by composerken on Jun 20, 2016 4:46:47 GMT
Another update! I built five more bass traps, this time using the Owens Corning 703 panels. They're each appr. 4'x2'. I placed three along the walls to the sides of the listening position where the walls meet the floor. The last two I placed above and below the diffuser on the back wall. I was placed an acoustic panel using the Auralex material (also about 4'x2') above the listening position on the ceiling, with a three inch gap. Here are some results from the testing I just did with REW: Now, I'm a little confused as I'm not seeing that much lower end improvement. First, after adding almost twice as many bass traps, the peaks and nulls compared to my last test look about the same, with that same peak around 40Hz and a noticeable null around 68Hz. The decay plot looks a little better 60Hz and up, but those two ringers at around 30 and 40 Hz are strange. Any ideas what the boost at 40Hz is about? As before, I'd love to hear your inputs!
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Post by Ethan Winer on Jun 20, 2016 16:33:02 GMT
You said your added bass traps are 2x4 feet, but how thick are they? At least four inches I hope?
If your concern is bass frequencies, try moving two traps from the side wall-floor corners to the rear wall-floor. If that improves the LF response, move two more to the rear wall-ceiling corner.
Adding bass traps is logarithmic, not linear. So if you have four traps and add four more, you'll have twice as much trapping and can expect some amount of improvement. But to get the same increase next time you have to add eight bass traps, then 16 after that. So it's all incremental, and it never happens that you add one or three or even five bass traps and all of a sudden the response is very flat. If you can get the total span between the worst peak ad the worst null within 10 dB below 300 Hz, you're doing very well!
The 40 Hz ringing peak looks like a mode.
--Ethan
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Post by composerken on Jun 20, 2016 17:44:26 GMT
Ah, I see. Thanks, Ethan. The traps that I added are not quite 4". They come out to about 3.5" with the burlap. There are still some parts of the room that I can cover, so maybe I'll construct a few more traps that use two layers of the OC 703 and move them around in different spots to see what improvements I can gain.
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Post by Ethan Winer on Jun 22, 2016 16:29:49 GMT
3.5 inches is very close to 4 inches. My point is more that 1 or 2 inches thick is not enough. As usual, the answer is always "more bass traps!"
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Post by Hexspa on Jun 22, 2016 20:54:17 GMT
As usual, the answer is always "more bass traps!" Sticky? tattoo? Sticky tattoo?
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