[jhbrandt]

Dayo,

Yes, you do have modal resonance problems. From the pic it looks as though you have the mid-range taken care of, but you need proper bass traps to address the particular problem frequencies.

Can you give exact dimensions of your rooms? H X W X D of both rooms. I will calculate your modes for you and can then suggest what kind of trap you will need to build or buy.. or Ethan will.

Cheers