Waterfall before and after treatment

[Chevron]

Just added a small collection of GIK panels to my room. The usual spots, corners and mid room points etc. Room dimensions are 24 ft x 12 ft x 8 ft and the floor is carpeted.. Just wanted some expert assistance assimilating the results of the waterfall graphs.

Left monitor - no treatment



Left monitor - with treatment



Right monitor - no treatment



Right monitor - with treatment

[Lights]

Not an expert. I'll just caveat that now. But I am going through my own room treatment now and so I'm familiar with the waterfalls. It looks like you had some improvement in the ringing of 100Hz and above frequencies but no improvement below 100Hz. Also the overall frequency response of the room (minus ringing) didn't change much or at all.

You may need soffit traps for the corners. And you obviously need more trapping to even out the room's response. All of those peaks and valleys aren't good. And this may be just the different resolution of your measurement program but your decay is still around 250ms even in ranges where you don't have ringing. That seems long to me.

I guess probably more and thicker bass traps.

[DanDan]

Small amount of trapping, small effect.
Also the room before treatment doesn't look particularly bad to me, the opposite in fact. Except for the right. Play sines on the R speaker at the frequencies of those modes. Move about and find the hot spots. Put all your bass trapping there.
DD

[Chevron]

Thanks guys.

Dan I will try playing some tones and find a good spot to absorb more bass.

[Chevron]

Added another bass trap and shifted the monitor position slightly, and of course took some new measurements..

Left Monitor



Right monitor

[Chevron]

Would really appreciate any help regarding the graphs.

Also what's the best treatment for sub 100 Hz problems..

[Glenn Kuras]

Originally Posted by Chevron

Would really appreciate any help regarding the graphs.

Also what's the best treatment for sub 100 Hz problems..

Straddling panels will do wonders below 100 hz. Not so long ago I did a test in our lab/test room with 8 monsters you can see the results here
Need advice on waterfall!
BTW part of buying our product is you get room consulting for free. The forums are great for DIY guys but we can give you much better advice one on one. I would recommend using the following form so we can get all of your info and go through your room.
GIK Acoustics: Room Setup

[DanDan]

Well done. The Waterfalls look pretty good to me. See if you can fill in that hole around 80Hz by moving listener or speaker positions.
DD