I owned the Model 1, 2 and jumped all the way to the 8 (no battery pack) some years back driving my previous Avalon speakers, I could not tell of any "house-sound" except from the fact thet they were all great in my system - natural, musical and dead-silent.
Saying that - I switched to Gryphon amps and never came back.
Saying that - I switched to Gryphon amps and never came back.