K Kenneth Gerald New member Mar 13, 2024 #1 PRO MPA II can be a difficult unit. I had popping noise and distortion , then channel one went out . So I called Sweetwater (800)222-4700 and they sold me the exact same tubes and all my problems were solved
PRO MPA II can be a difficult unit. I had popping noise and distortion , then channel one went out . So I called Sweetwater (800)222-4700 and they sold me the exact same tubes and all my problems were solved
K Kenneth Gerald New member Mar 14, 2024 #3 I've seen ten different complaints about this unit just trying to help