Need help with in-room measurements

[olds1959special]

Can anyone please tell me how these measurements look? This was done from a stationary mic from listening position (Beyerdynamic MM-1 with 0 degree cal file.) I have a custom setup with two different size subwoofers next to each speaker and am using crossovers to make it work. I played with the gain settings and boosted the high trim and then applied corrective EQ and this is what my measurements look like.

(Please move this to the newbie question subform if that's more appropriate.)

 

[staticV3]

Both treble and midrage show some weirdness.

I'd try MMM instead of stationary mic, specifically with Uncorrelated option turned on in REW's Generator.

You'd likely also benefit from placing the subs more spread out in the room, instead of stacked below the bookshelves.

Might be able to get rid of the troughs at 55, 100, and 190Hz that way, especially when you use Multi Sub Optimizer.

 

[olds1959special]

Both treble and midrage show some weirdness.

I'd try MMM instead of stationary mac, specifically with Uncorrelated option turned on in REW's Generator.

You'd likely also benefit from placing the subs more spread out in the room, instead of stacked below the bookshelves.

Might be able to get rid of the troughs at 55, 100, and 190Hz that way, especially when you use Multi Sub Optimizer.

My next project is to get better at doing MMM measurements and thanks for the suggestion. I want to use this as a starting point, though. I noticed a hum sound that I couldn't fix and then decided to set up the speakers a bit differently by using a splitter + HPF switch on the speaker instead of going through the crossover of the sub. Anyway, long story short, I fixed the hum, (I still had to use hum-x plugs) and had to set everything up again and then I applied some corrective EQ and this is what it looks like now, with the high trim of the speakers turned up "+1" which I thought would be okay since there seems to be a large proportion of bass. I don't have space to put subs anywhere else at this time. Would you mind taking a look at this measurement to see if it's any better?

 

[olds1959special]

This shows the EQ I had to use to get that result, though.

 

[staticV3]

Would you mind taking a look at this measurement to see if it's any better?

Bass level looks more balanced, though perhaps a bit too much now.

Though the problem areas are still there:

-Room nulls at 55, 100, 200Hz
-Strong midrange swings of ±10dB
-slightly weird treble response

Is this with MMM or stationary?
Uncorrelated turned on in Generator?

Also, please go to RTA->Cogwheel->Appearance->Turn off "Use bars on RTA"/"Use bars on spectrum"
Makes the graphs easier on the eyes

 

[olds1959special]

Bass level looks more balanced, though perhaps a bit too much now.

Though the problem areas are still there:

-Room nulls at 55, 100, 200Hz
-Strong midrange swings of ±10dB
-slightly weird treble response

Is this with MMM or stationary?
Uncorrelated turned on in Generator?

Also, please go to RTA->Cogwheel->Appearance->Turn off "Use bars on RTA"/"Use bars on spectrum"
Makes the graphs easier on the eyes

Thanks, after thinking it over I decided to pull out the 10" subs and just use the 12" ones. I re-measured and adjusted gain and added corrective EQ. I turned the high trim to 0. This is a stationary measurement, I couldn't find an option for uncorrelated? (I included a screen shot.)

 

[staticV3]

I couldn't find an option for uncorrelated? (I included a screen shot.)

Ah looks like it's still stuck in the Beta build of REW: https://www.avnirvana.com/threads/rew-api-beta-releases.12981/

Uncorrelated can fix treble response issues when both speakers are playing in sync.

An example:

Need Help: KH120A + Dual KH750DSP Nulls in untreated room

Thanks for reading my thread! I'm seeking help about eliminating the nulls in a non acoustic treated room. I'm running the Neumann KH120A + Dual KH750DSP setup (with MA-1 Calibration), I've been working on them for several days now, and the REW Result still doesn't seem promising, with several...

www.audiosciencereview.com

->Correlated->individual L/R measurements are fine. L+R measurement shows treble dip.

Need Help: KH120A + Dual KH750DSP Nulls in untreated room

Furthermore, set RTA->Cogwheel->Max overlap to 93.75% for slightly faster data acquisition. And I'd also disable "Stop at: 45". Personally, I usually do 100-150 AVGes, even 300 at times though that's decidedly overkill. Regarding the dip in bass response, try replicating your room and speaker...

www.audiosciencereview.com

->Uncorrelated->Same treble response with both individual L/R and L+R

 

[olds1959special]

My most recent results after corrective EQ, using the uncorrelated setting in the noise generator. This is with the crossover set at 60 Hz instead of 80 Hz.

 

[staticV3]

My most recent results after corrective EQ, using the uncorrelated setting in the noise generator. This is with the crossover set at 60 Hz instead of 80 Hz.
View attachment 503973

All but 50-200Hz and the small dip at 1.5k looks really nice now.

For the former, you'd have to consider placement or room treatment.

And for the latter, I'd give correcting it a try, maybe A/Bing On vs Off using Pink noise and if it sounds worse, perfectly fine to keep it I corrected as the dip may not be present in the direct sound.

That's where you could try Windowed sweep measurements to separate direct from reflected sound.

 

[olds1959special]

All but 50-200Hz and the small dip at 1.5k looks really nice now.

I measured the right side only with the mic facing the right speaker away from my desk (with corrective EQ which is all subtractive at 46, 62 and 120 Hz.) There is no more 1.5k dip.

This is my measurement from the sitting position.