My Yamaha DSP A1 shuts off when the volume is slightly more than 1/4 max. Does anyone know why it does this? I am new to home theater and recently built a media room, 22'x20'. The room was pre wired during construction. Along the front wall is a Panasonic 50' plasma TV. The components include: Yamaha DSP A1 Sony Turntable Samsung TS160 HDTV Tuner Adcom ACE-315 Surge Supressor Adcom GFA-555 Power Amp (for 4 speakers around pool- two Bose mounted under a Lanai & two rock speakers in the Garden, two other rooms each with two speakers) CSI Speaker selector for the speakers running off the Adcom GFA-555 Harman/Kardon TU930 AM/FM Tuner with a Terk FM50 antenna in the attic (wish I had a solution for an AM antenna for reception of far away college football games) Pioneer 563A-S DVD Player( I plan to replace with a Denon 5900) The Yamaha DSP A1 drives MonitorAudio Silver SLR center channel speaker MonitorAudio Silver S10 x2 MonitorAudio Silver S1 x2 MonitorAudio SFX Surrounds x2 Velodyne HSG 18 I had never had this problem previously when the Yamaha was connected in another room with a much lower end 6 speakers (2 fronts, center, two rears and subwoofer). Secondly if I were to replace the yamaha, what would one recommend to complement the components in my system? I am trying to better my knowledge of Home Theater and would like a quality system without getting totally out of control on the cost. Thank you for the anticipated reply.