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I think I need more bass traps, where to place them??

Hi guys, I already have bass traps in all four corners of my room but I still have some pretty bad room modes resulting in big peaks at 60/120hz and dips at 80/160hz.

I spent hours and days messing around with speaker placement and my current setup is the best I can do in terms of matching my target room response curve aside from these modes.

So my question is...I assume I need more bass traps?  If so, what is next logical position for them?  Sidewalls?  Front wall between the speakers or directly behind speakers?  Back wall?  If the answer is yes to all positions, then where should I start?  Due to financial restrictions I would like to treat one area at a time.

Thank you!
128x128tboooe
onhwy61's avatar
onhwy61
5,142 posts
 
From previous threads, your room is basically a small cube (10x9x10) which, to put it kindly, is a tough acoustic environment.  You should get professional help and guidance.  It will probably be more cost effective than hit or miss internet forum advice.
erik_squires
15,791 posts
 
Soffit traps, from GIK Acousitcs, you can run them on all 4 sides of your ceiling.

However, two tips:

1. Place your speakers asymmetrically
2. Get an EQ.

Since you have bass traps, controlling the room nodes is going to be a lot easier with an EQ, you are no longer in the realm of "impossible" peaks and valleys.

Best,

Erik
erndog's avatar
erndog
261 posts
 
Talk with the gents at GIK.  They are pros with this stuff and can save you time and effort with their expertise.  They are very helpful.

geoffkait's avatar
geoffkait
23,365 posts
 
It would help considerably if you located the standing waves and reflections in the room using a test tone on a CD or record and a sound pressure meter. Trying to find the ideal locations of multiple tube traps is a lot like trying to solve three simultaneous equations in four unknowns. As fate would have it oftentimes the standing wave one is attempting to address with a tube trap is not located directly in the room corner but say a foot or two away from the corner.
bdp24's avatar
bdp24
9,460 posts
 
There are also room resonance calculators/simulators on the 'net. You put your room dimensions into a form, and a three dimensional depiction of where standing waves are produced in the room will be displayed. That is where bass traps should go. An active electronic unit designed to deal with the problem, like the DSPeaker Anti-Mode 2.0 Dual Core, can also be of help.
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