FWIW, I have a 3806 driving a Dynaudio Audience 5.1 system in a 15'x30' combo living/dining room (with 9' cathedral ceilings) with no issues, and it is frequently the main audio system for our social events, including the party spillover to the adjacent patio (2 outdoor speakers driven by the 3806's Zone 2 amps). I used to have an Adcom GFA-5300/5500 amp setup powering the speakers for this room, but a few years ago I got curious as to whether I actually needed the power or was just feeding my audio equipment jones. The result of that test is that I no longer have the amps in that system and have noticed no difference in either usable sound levels (my wife still complains about the level when I get too liberal with the volume control!) or sound quality.