XPA Gen 3 Common ground?

[davearnold]

Hi Keith,

Did a forum search and couldn't find any info for the latest XPA Gen 3 amps: are they common ground? I have older Polk SDA-SRS speakers with the interconnect cable.

Edit: Specifically the XPA-2 Gen 3 

Thanks,

Dave

[davearnold]

Update: Spoke with tech support and the XPA-2 Gen 3 is common ground.