eD a7s-650 room response

[Tungsten06GT]

Hey guys,

I posted this in the subwoofer section, but maybe this part is more appropriate. Anyhow, check out my attached room response...

What you are looking at is a frequency sweep of 40 tones from 10 hz to 100 hz. Each bar on the x-axis is spaced logarithmically 10 hz apart, starting on the 0-axis at 10 hz, and going to the far right axis at 100 hz.

The sub is placed behind me, near the center of the wall in a 20x13 room (sub on the 13' wall facing out). The stuff from 12 hz to 35 hz doesn't bother me, it's the huge hump after 35, to like 75 hz, which definitely makes the sub sound boomy.

I've tried it multiple places and there always seems to be that hump there. I definitely don't want to add room treatments, and equilization may be my only other option. Otherwise, it seems like keep trying it out in other places right? Any suggestions are appreaciated, thanks!

 

[bpape]

That's pretty wide to be purely a postional thing with the sub. Have you tried moving YOU (the mic) and see what happens? If moving the sub changes little, then there are other things at work.

You may also want to post the waterfall if the program you're using does that so we can better see what's happening.

Bryan

 

[Tungsten06GT]

That's pretty wide to be purely a postional thing with the sub. Have you tried moving YOU (the mic) and see what happens? If moving the sub changes little, then there are other things at work.

You may also want to post the waterfall if the program you're using does that so we can better see what's happening.

Bryan

I'm actually only using an spl meter and I created 40, 0dB .wav files at frequencies ranging from 10 hz to 100 hz.

I will try moving the meter around the room at frequencies in that peak band to see what happens...

When you say "other things at work," what might you be speculating?

 

[bpape]

When you take measurements, it's critical to have the mic in the same place. Shifting a few inches in any of the 3 room dimensions can change the response. So, when you remeasure, make sure the mic is at seated ear level and you are only moving forward, not side to side also.

Other things could be:

- Width mode of the room with you sitting in the center.

- Sub level too high and what you're seeing is actually a dip down lower rather than a peak up to the blend point

- Boundary interactions between the sub and the mains coupled with shallow slope on the mains xover causing doubling of the frequency range where they're both operating.

Bryan