Help - static noise in speakers

oddiofyl - you are correct as well.  I had no idea, but yes - when I moved the ethernet cable farther away from the amp, the noise stopped.  

Thanks to everyone who responded.  After all the troubleshooting, it was the simplest fix - move the ethernet farther from the amp.

Any noise due to external factors would show up on both channels, my best guess of OP issue is failing cap, resistor, cold solder, either diy repair or return to manufacturer, let them diagnose, this all speculation at this point.

Any noise due to external factors would show up on both channels, my best guess of OP issue is failing cap, resistor, cold solder, either diy repair or return to manufacturer, let them diagnose, this all speculation at this point.

Not really.

I imagine the internet cable the OP moved was on the same side of the amp’s  connected speaker. Just a guess the static sound started recently when the OP moved the internet cable in close proximity to that side of the amp.

Quick check, move the internet cable back in the same spot as before producing the static sound. Static sound back again? Move the cable away again. Static sound gone? The OP just saved himself a bunch of money thanks to @oddiofyl .

.

Nice !  Some tubes are more immune to RFI than others.  Some are intolerant and act like an antenna when not shielded or RFI is too close.