just received pair of m200's that i am using to drive a set of mirage 1090i's. the receiver being used is a b&k avr 307. when i have the amps set to music and power the unit down after use, the amps take an awfully long time to switch into standby mode. actually they took over an hour to switch. even when i had the amps on for five minutes it still took a while. my old adcom set up with seperates used to drain down instantly. to me, these amps sound very bright/dynamic in 2 channel mode which steals some bass from the speakers but in sorround mode they are very detailed. any comments please help.