The system has been calibrated to approximately 75db in the primary listening position with the meter set on C weighting slow response. The crossover is set to 90 hz or about 10 hz above the mt80's. The system is powered by a Kenwood vr-5900 and the mains are set to NML (small) setting.

It is in a room that is 13'5" by 23'. I get the same'feeling' no matter what volume the sub is at.
Thank you