I'm enjoying my new entry level system - Rega P1 turntable, Epos ES11 speakers, and Rega Brio amplifier. But intermittently the system will produce a VERY loud hum - much louder in volume than the music that is playing. The strangest thing is that I can get the hum to stop by tapping or flicking the amplifier with my finger pretty much anywhere - front, side, volume knob. I can also make it stop by jiggling the input cable (red/white RCA) from my turntable, though this only works if I jiggle it near where the cable connects to the amplifier. This also works vice-versa - if the system is not humming I can make it start by doing those things. When the humming is on and I use my finger to tap on the amplifier, I can hear the finger tap coming out through the speakers!
I tried unplugging the turntable from its power source, but the humming problem still existed. However, when I unplugged the turntable input cable (red/white RCA) from the amplifier, I could not recreate the humming problem! What does this mean?!? Any ideas would be greatly appreciated. Thanks!