A:AnswerThe mixer itself is a Karaoke / PA Stereo Amplifier but the unit's LINE OUT (RCA) jacks can be used to connect to a second power amplifier, an external sound
system or mixing device.
A:AnswerThe manufacturer of this unit makes and sells 2 or 3 different microphones. I myself purchased one and it works flawlessly. Only real accessories needed would be karaoke CDs.
A:AnswerThe unit can handle the 2 1000 watts speakers. However, the unit is not subwoofer ready. You may use an Active subwoofer going through the Line out RCA port
A:AnswerIf the Sonos have "auto pairing" then its a yes. Mic will work with connecting lineout to another amp. The unit has speaker terminals at the back that can power two 1000 watts speakers.