Hi, My room layout and position of speakers cause serious null between 45-80 hz region. My main speakers can run down to about 30hz with room gain and running REW sweeps indicate a serious null in that region. Adding the sub makes it even worse. I've tried adjusting distance in the processor, frequency cut-off and phase adjustment on the sub but the problem persists. The room is 4.5x3.9x2.6m with a bay window and a chimney breast. The position of speakers is set so can't really be moved elsewhere. Just want to understand how people get round this issue and if there's anything that can be done?