I’m getting a low-level hum (60 cycles) with my AKG Solid Tube.
Check the fuse insert on the power supply. If you’re in the US or other territories that use 110-120v power, make sure you see “115” in little window. If you don’t, unplug the power supply, remove the insert and turn 180°. This will change the operating voltage to the proper 115v.
If you’re in territories or states which use 210-230v, be sure to set the fuse insert so that “230v” is facing out.
Consult the owners manual for detailed information on this fuse insert.
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