XLS Crown amps are prob good for 24/7/15 years... Don't worry about auto on.
The Sonos amp has a subwoofer out but the connect does not. If you don't have anything connected to the subwoofer out, I suspect it will run at full range. If it's like their line inputs, it's auto sensing whether something is connected to it.
There is no truth anymore. Only assertions. The internet world has no interest in truth, only vindication for preconceived assumptions.
