Originally Posted by Ashi777
I have looked into this and I thought that bass traps do almost nothing for frequencies below 60hz?
Hi, I'm sorry that I couldn't respond sooner, but I see that you have already received a couple of other responses. Again, I don't consider myself anything like an expert on this subject, but based on what I have read, and to some extent experienced, good bass traps can provide some degree of attenuation down to 30-35hz. That comes from Ethan Winer in his book "The Audio Expert". The question is how much attenuation? As I see it, you have a combination of resources at your disposal. Audyssey alone certainly can't solve your problem. But perhaps a good bass trap could make the problem more manageable in order for Audyssey to be able to help solve it.
The approach that I might take (and did take with a similar problem) would be to buy something relatively inexpensive like the foam corner trap I linked. Try that, and listen to find out if it helps at all. I ended up augmenting mine with some additional acoustic material I had on hand. Then, once I was sure that I knew where to put the corner trap, and that it was possible to attenuate the really unpleasant resonance I was getting at around 50hz, I invested in a better fiberglass trap. I bought the same one that Enrico described to you, and re-purposed the foam trap to another corner. Since then I have subtly treated the other corners, as well.
What I have found is that properly positioned bass traps can not only help to resolve specific problems and make it easier to achieve better room correction at that frequency, but that they can help to clean-up bass in general. Aside from eliminating the really gnarly resonance I had (also from a low cabinet by the way), I found that my mid-range became much cleaner. Too much, or the wrong kind at least, bass resonance can obscure vocals and instrument solos such as saxophone, clarinet, and acoustic guitar, for instance. I have XT-32, but even so, it is nice to give it some help.
If you are a DIY type, which I'm not particularly, you could probably cobble something together from Home Depot just to see whether a corner trap will work. But I would definitely experiment with something.