Hello.

I have a problem with the speakers in the amplifier.

When I run the amp it sounds for about half a second, after that time is absolute silence - not important here is the volume knob position.

The problem is probably in the speakers (both), when I run a tuner - it is working properly, so input is OK.

I tried to upgrade firmware, unfortunately it also did not help.

What could be causing this?

Sorry for my english.