when tone defeat is on then it works but not as loud as the left channelNot sure I plugged it back in must have come lose. I noticed when u turn that switch that has left right l and r and normal position. When I turn it to normal position the right channel not working but when it’s in the left right position it works on both channels? Should I be concerned? Thanks
no I just bought it so no historylooks like someone beat you to it and was diagnosing a fault .
do you have the history of it ?