Reset the receiver and possibly you need to recalibrate settings and processing??

I had a H/K AVR110 which ran my M60's, VP150 and QS8's with no issue to 100db's without distortion. H/K receivers are solid with plenty of power, mine was 45w/channel if memory serves. I moved to a Yammy RX-V4600 which is supposed to have top of the line parts and it pushes something like 130w/channel. I prefer this receiver and it does go a little louder but the H/K definitley gave it a run for the money.

Good luck

High Gloss Cherry
M60 VP150 QS8
Open for Auditions but please don't drool on the High Gloss