I got the rc-20 xl loop station for Christmas and it has this horrible humm so i dont even use it any more because i leave it unplugged any advice, is this fixable??????
Ibanez Rg prestige 2550z
Valveking 212
it's probably from not using the right power supply. Even tho it takes 9 volt there are still many different types. Try using a battery if that works then you know it's the power supply if it doesn't solve your problem it's probably defective. YOu can also buy the Hum Debugger from electro-harmonix that cuts out all the hum.