Thanks for the reply. I’m out of town and will check when return home.I use 4.0V output and (assuming you are using balamced connection) 600Ω input impedance on the L10/L1. Output impedance from the SP tends to vary a little depending on cable and speakers, but with the other settings fixed it's easy enough to settle on a preference. It's also worth playing with the gain structure between L11 and M1.1 - adding a little at the input, removing a little on the amp...