Running a full stereo signal out of the psr (as I've done my T2 for years) into inputs 3 & 4 (which share a channel on the rear of the tonematch.

I've had it explained to me it not a true stereo sound because there's no left right to the PA system I'm using. It is the fullest way however to transmit the full output of the kb to a mono system that I'm aware of given the equipment I'm using.

I've been very pleased with the sound of both the pinao and the kb in general.