I already own an AMP+ with RPi B+, which has been running picorePlayer for about 3 years now. I'm very happy with it.
I would like to add an RPi3 + AMP2 + USB Hard drive (and some to be chosen speakers) to my multiroom setup.
What power supply (if any) could I use?
Another question: is the only difference between the AMP+ and the AMP2 the output power?