Bose has dropped the non-battery s1 pro and now includes it at the same price of $599. They also have upgraded the software to use the bose connect app for stereo streaming with 2 bose units.I still love my 2 s1 pros. When using just one the korg pa1000 sounds much better in mono than the compact; fuller and richer.
MEL
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KORG PA1000, KORG PA900, 2 BOSE S1 PROS, 2 BOSE L1 COMPACTS, YAMAHA STAGEPAS 500, ROLAND VP7