OK, which one?

@audphile1 ,  Yeah, I've got it narrowed down to the left output. Happens with all sources, moves to the right speaker when I switch cables around, still happens when I switch to other cables, doesn't matter which input I use. Found a shop to look at it about an hour away. Of course he's busy and who knows when I'd see it again. Possibility it's in the preamp section, I guess...

Good idea to try both Qobuz and Tidal.

Yeah that’s the problem with repair shops. If they take 2-3 weeks to turn it around consider yourself lucky. It can go on for months. 

@thecarpathian, are you in Central Florida ? My best! MrD.

@mrdecibel , When I'm in Florida, the northeast, by Jacksonville.

I spend the majority of the year in Connecticut, where I am now.

I have equipment I would have loaned you while your amp is being serviced.