Sonos does not specify this and I can understand why - what matter with play units is how loud they can go without clipping/distorting. But Sonos does not specify this either.
It would be interesting to know how the units stack up on clean sound levels delivered when compared to the 55 wpc Connect Amp, driving a typical HiFi speaker of, say 87dBm sensitivity levels. Has anyone done this comparison between the Connect Amp on one hand and play units on the other?
My experience is that even the 1 units go louder faster than a Connect Amp powered set up does. I haven't the place or the means where I can do this comparison with both running at 100% volume. Has anyone any useful experience to offer in this area? I have no idea of the sensitivity levels on the play 1 drivers, but my limited experience suggests that the 1 has amps that deliver more than 55 watts rms power. If I am not far wrong, that is impressive power delivery performance from the built in amps.