Sonos support is chewing on this, but I was wondering if others out there have tried this paring. I sent it the diagnostic report when asked and she said there were no obvious issues.
Best answer by marky4556
I ended up returning the Sonos Amp and buying a Sonos Connect and paired it with an Audio Control Rialto 400 amplifier at the recommendation of Origin Acoustics (maker of the AS4.1 system). I am much happer. While i wish i could have gotten down to one unit, the Rialto 400 does a much better job of driving the AS4.1 system and even allows me some room for growth in speakers.
I appreciate Sonos technical support team's help.