We did two jobs this week with the Sonos Amps and on both jobs the output was far lower than what a connect:amp would provide. On one job we had a pair of Bose outdoor speakers and on the other job is 1 Niles planter speaker. I have done both speakers directly off of a connect amp in the past and they sounded great with plenty of power but on both these jobs with the Amp with volume maxed out, you can have a conversation standing next to the speakers. Wiring is correct on both and I see no settings that would cause the volume to be decreased.