Home › Forums › Products › Stompboxes › H9 low hum noise issue › Reply To: H9 low hum noise issue December 25, 2020 at 7:00 pm #156667 joecozziModeratorEventide Staff I notice Send A has a Hi-Z switch. Have you tried using it with it on and off? Have you tried connecting the H9 using Send B instead of A?
