Just a quick bit of anecdotal evidence to an old thread. I have had issues with every audio device from a Logitech thx speaker setup to a Yamaha RX-675 to an RX-A2030 which is what I have now. Each unit would just shut down during loud passages, basically when more power was called upon. This is with three devices now. I went ahead and bought a furman M-8dx and it hasn't happened since.
Receiver: Yamaha RX-A2030
LCR: Klipsch RB-81 II C: Klipsch RC-62 II
SS: Klipsch icon KB-15 RS: Bic Acoustech PL-66 2 Polk OWM-3
LFE: 2 PSA XV-15
Source: PC, Directv AC: Furman M8-Dx Display: Viewsonic PJD7820HD, Silver Ticket HDTV 16:9 120" Fixed Frame Projector Screen