Home › Forums › Products › Stompboxes › H9 yields bad hum when plugged in effects loop › Reply To: H9 yields bad hum when plugged in effects loop December 1, 2013 at 1:13 am #135851 jackbrightonParticipant Well shoot: the hum in the effects loop happens with my H9, but not with other effects devices. Could it be a hardware defect in the power supply or the H9 itself?
