perhaps the OP should get to basics and work on the placement as described by alan loft in his excellent article. once that is done maybe bass traps should be considered.

I have moved around alot in my lifetime ,and lived in many different houses,some big and some small, and my trusty hpm 900's were always there. They definetly had better bass in some houses than others. Im still convinced the OP has more than one problem here.Hopefully he can get it worked out,and get back to the music.

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