Treating my weird control room!

[charmingtedious]

Well, I mostly killed the comb filtering by swapping the 4" traps on the rear wall with some 6" traps. Now here's what I'm looking at.

[GIK Acoustics]

I posted in your thread you made on tape op with this:

Actually, that is likely due to your test set up. When you do your tests, you want to only use one speaker at a time for them.

Your treatment hasn't seemed to change the frequency response too much - but I bet if you looked at the waterfall graphs you'd see a lot more improvement (I'm sure you can hear a big difference, right?). Oh, and ceiling reflection could be giving you a comb filtered like response as well.

You may want to also trap the rear corners as well. The back wall can be a huge offender in bass response. I would try (just to see) perhaps stacking your two red ones on the front wall in the rear corners. If you can hear a large improvement, go for more traps in the rear corners.

Check out our video we did on REW here, it explains how to properly test and view your results: Room EQ Wizard Tutorial Video

[Ethan Winer]

It's good to measure each speaker separately, but it's just as important to measure both speakers together. At least for bass frequencies. Most music has all bass content panned to the center, so measuring the LF response with both speakers playing more closely emulates what happens when listening to music.

--Ethan

The Acoustic Treatment Experts

[Rondeath]

Ethan, to measure with both speakers together, i need to calibrate the right and left output soundcard?

[Ethan Winer]

^^^ No, simply play the sweep tone through both speakers at once. REW already does that by default, sending the tone through both sound card outputs.

--Ethan

[Rondeath]

ahh thanks,
I thought I could just use the side that used to calibrate. So after calibrating, just plug the right speaker in the right output, the left speaker in the left output and then calibrate left alone, and finally the 2 together?
Thats it Ethan ?

Thanks

[Ethan Winer]

You don't really need to calibrate. That's needed only for knowing the absolute SPL, which doesn't matter. All you care about are the relative response changes versus frequency.

--Ethan

[charmingtedious]

Is it worth swapping the deepest traps in the front corners with 705-frk? (I got a box of it for cheap)

I understand from Ethan's article that it has a slightly better response in the low low end. But maybe my principal problems lie between 100 and 150 hz?


Also, is there anything wrong with building 6" traps out of 2" FRK?

[Ethan Winer]

If you layer 2" panels to be thicker, remove the FRK from the two that are behind the first one. Only the panel that faces the room should have FRK.

--Ethan