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Acoustical Treatments Because the room matters

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  #1  
Old 07-30-2020, 12:59 PM
n_brio n_brio is offline
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Default Help me understand REW result

Hello

Im new to this, REW and aucustic treatment...
Help me understand this result from REW and what i need in aucustic treatment to get a improved sound.

Variabel smorthing




RT60




What do you suggest my next step is?
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Last edited by n_brio; 07-30-2020 at 01:03 PM.
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  #2  
Old 07-30-2020, 02:54 PM
Tim Link Tim Link is offline
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Hi. It looks like you've got room resonances at about 43 Hz and 79 Hz. First thing to try is moving the subwoofer if possible to try to get a smoother response. If you have an equalizer I would try a 10 db cut at 43 Hz and a 5 db cut at 79 Hz. You'll have to experiment with the Q setting to dial it in. That's pretty simple EQ and it should improve the sound noticeably. Some bass traps in the corners of the room will also help to tighten and clarify the bass. You could also get a couple more subwoofers and place them around the room to break up modes and smooth the bass.
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Old 07-30-2020, 03:18 PM
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Default Help me understand REW result

How does your room sound to you? Yes you have resonance at 40ish Hz but does it bother you? Don’t chase a flat response...
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Old 07-31-2020, 02:10 PM
n_brio n_brio is offline
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I think it sound good but maybe i have some hidden improvment

Does the messuremen look good?
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Old 07-31-2020, 02:43 PM
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Default Help me understand REW result

It does look pretty good except for the 45Hz resonance. As mentioned before, room treatments at that frequency is very difficult. Try as best you can to reduce it by adjusting your listening position, main speakers positions and your Sub if you have one. If you do have a sub AND a crossover, you can probably tame that resonance easier, especially if it is from your main speakers. The idea would be to set the high and low pass through crossovers to something above that region, say 50Hz let your sub handle from there and below. Locate it to minimize the resonance as much as possible.
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Main room - Sonus Faber Stradivari, JL Audio F113v2 & CR-1 Crossover, McIntosh MC2301 Amplifiers, Bricasti M21 PreAmp & DAC, SilenZio v.2 Audio by -E- Media Server (running ROON), GigaFoil v4, Keces P3 with Ghent PC, 9 M Supra Cat 8+ and 0.65 M Revelation Audio ethernet cables, Shunyata Denali 6000/S v2 with Venom Defender, PS Audio Dectet. Sonore Optical Modules, iFI LPS. Ubiquiti Edge Router X-SFP, iFI LPS.

Stillpoint Apertures, Minis and Ultra SS footers, GIK Bass Traps, Vicoustics Waveguide panels, WW Gold Eclipse 7 SCs, WW Silver Electra 7 PCs, WW Silver Eclipse 7 ICs; 3 X 20 Amp Power lines, 3 Sound Anchor stands, PS Audio Powerports and numerous Noise Harvesters. Furutech Flex 50, Cable risers, HRS dampeners

Last edited by crwilli; 07-31-2020 at 02:45 PM.
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Old 07-31-2020, 06:13 PM
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What are the dimensions of your room?
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Old 07-31-2020, 08:37 PM
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Quote:
Originally Posted by W9TR View Post
What are the dimensions of your room?


What he said
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  #8  
Old 08-04-2020, 09:59 AM
n_brio n_brio is offline
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My room is 14*13 feet and 8 feet high
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  #9  
Old 08-04-2020, 02:44 PM
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Based on your room dimensions you will have primary modes (resonances) at 40 Hz, 43 Hz, and 70 Hz, for the 13’, 14’ and 8’ dimensions, respectively. You will also have modes at 2x, 3x, 4x these frequencies, which REW is showing you.

These modes will be with you unless you acoustically treat the room, especially the 40 Hz ones, which are super hard to eliminate.

But you can minimize their contribution to the sound of your system by moving your speakers and your listening chair away from walls to the extent it is possible.

If you have a sub you can try moving it out into the room to reduce coupling with these modes.
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Main System:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 80
Nottingham Dais with Sumiko Palo Santos Presentation
SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

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  #10  
Old 08-04-2020, 05:21 PM
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Quote:
Originally Posted by n_brio View Post
My room is 14*13 feet and 8 feet high
The guys are correct that you've got some notable room modes that require correction.

Part of the problem is that your room is almost square; such dimensions create more problems than a rectangular room.

You're going to require acoustical treatments to counter these problems. My suggestion would be to get several GIK Alpha 4A panels from GIK Acoustics and use them around the room both for diffusion and to function as bass frequency absorbers. That 40 Hz peak that Tom referenced is the top priority. I've been using the GIK panels for about a year now and they have made a significant improvement in the audio quality of my room.

There is a forum here for GIK Acoustic, so you'll find information there on how to contact them. They're great, the products are affordable and they are very helpful providing support and recommendations.
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