As I recall Pioneer's implementation of the ICE amp modules, had issues with low impedance at high frequencies. They become unstable, and go into thermal protection when driving <4 Ohms at >12kHz. Luckily the M80 presents a load of about 9 Ohms at that frequency and it goes up from there.

Down low, where the M80's impedance drops, Pioneer's amps are solid. So they are a well suited match.


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris