I recently upgraded my boston acoustics vr940 to vrm-90's. I continued to use a boston pv800 with my vrm-90s. Last night, for fun, I unhooked my sub and ran my mains as large. All I can say is the vrm-90s sound so much richer and more musical!! Perhaps I didn't have my sub calibrated correctly, but who cares. It's gone. I may eventually add another sub down the road, but I'm not missing it at the moment. The vrm-90's play down to 33 Hz. What do you audio experts make of this? Why could this be? Is it my imagination. I mean everything sounds good now. Before, only select songs would shine. Does this mean I'm an audiophile? Ha Ha.