Hello all, I have just bought this Amplifier, and after connecting it to my Diva DV88 it sounded pretty good (source direct). After a while I tested the use of bass and treble, that went also well. But after an hour only the left channel works well with these specific bass-treble settings. Only on tone "off" (or source direct) both speakers work correct. I have restored the default factory settings, and even unplugged the amp for one night from the 220v. Both actions did not result in a solution. Is there any explaination of this behaviour of this amp? Software or a perhaps a security circuit? Is there any solution? Thanks in advance!