Originally Posted by Technic
Jaya3666 is using a G6600, which I think it might be defective if that whine is nothing else.
Ahhh, when he said he was using the same parts I thought that meant gear as well.
But in any event, the G-series amps use differential balanced inputs as well (owner's manual, page 6).
I'm not saying it's not the amp, but he needs to do the troubleshooting steps, in the order I laid out to figure out what IS the problem.