Ken, until you properly calibrate your system using an SPL meter and either the tones from your receiver or one of the discs previously mentioned, we can't be sure just exactly what is going on. When balancing individual speaker volumes by ear, it is very common to have the subwoofer volume set way too hot resulting in excessive ("boomy") bass. I'm not saying that is what's going on in your case, but we won't know until your system is accurately calibrated.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton