sir, i just bought a cr620, there is a loud hum/noise from it, i hear it from l and r channels, from speak.A an B . i hear it when the volume is at zero, i hear it on any input, but it is almost gone when i select the AM , it is worst when i move the bass pot, i suspect either the two big capacitors near the power supply , or the bass pot, i would really like to have your advice, Christian.
Good luck!
CH