\rHi Nick:
The speaker selector features isolated grounds. There are no common ground connections. The SONOS AMP has no problem with any of our 8 ohm speaker selectors. A better deal is combining the SONOS Connect and our OSD XMP100 Class D Power Amplifier. There is special pricing on the XMP100 plus you would get free shipping on both the amp and the SSVC6D speaker selector.
TL/4606\r