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-   -   Help me understand REW result (https://www.audioaficionado.org/showthread.php?t=48396)

n_brio 07-30-2020 12:59 PM

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
https://forumbilder.com/images/2020/07/30/var-sm.jpg

https://forumbilder.com/images/2020/07/30/water.jpg

RT60
https://forumbilder.com/images/2020/07/30/rt60.jpg

https://forumbilder.com/images/2020/07/30/dec.jpg

What do you suggest my next step is?

Tim Link 07-30-2020 02:54 PM

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.

crwilli 07-30-2020 03:18 PM

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...

n_brio 07-31-2020 02:10 PM

I think it sound good but maybe i have some hidden improvment:D

Does the messuremen look good?

crwilli 07-31-2020 02:43 PM

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.

W9TR 07-31-2020 06:13 PM

What are the dimensions of your room?

crwilli 07-31-2020 08:37 PM

Quote:

Originally Posted by W9TR (Post 1010313)
What are the dimensions of your room?



What he said

n_brio 08-04-2020 09:59 AM

My room is 14*13 feet and 8 feet high

W9TR 08-04-2020 02:44 PM

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.

Puma Cat 08-04-2020 05:21 PM

Quote:

Originally Posted by n_brio (Post 1010600)
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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