Help needed understanding plots

[EddieH]

As stated in the title, I'm trying to make a plan to correct boomy bass in my small media room. Long story short, my wife kicked my gear out of the living room during a remodel. I ran sweeps with subs isolated and together. I THINK, I have a 50 hz room mode and secondary reflections but truly I'm lost. I would like to install room correction, bass traps ext, but I not sure which frequencies I should target. Any help is appreciated.

 

[ddude003]

Welcome @EddieH... It is best to post a .mdat file with all your measurements...
You might take a look at https://www.avnirvana.com/threads/p...on-what-am-i-missing.16788/page-2#post-126414 where @Keith_W links (MAC1) to one of his presentations that you should read through in post #38...

And if your up for it grok this... https://archimago.blogspot.com/2026...lex.html?sc=1779365039840#c314592084732834353

 

[Keith_W]

Examining bass decay is difficult because the signal-noise ratio at low frequencies is typically very poor and because you need to look at multiple graphs taken from multiple positions to get an idea what is going on. It can sometimes be virtually impossible to tell the difference between decay and noise. As a start, follow that link @ddude003 posted and do what that other guy did - take a few 1M measurements and vector average them to push the noise floor down. You will also need to use a timing reference for all your measurements if you are going to average them.

And yes, please take a look at that eBook that I wrote. It's free, and I wrote it to help people read measurements.