HAS LEFT REAR KNOB BROKEN OFF I TURN KNOB WITH FINGER TO TEST THAT THE SPEAKER BANK WORK. DID NOT TEST IT WITH PROPER EQUIPMENT TO TEST ALL FOUR BANKS AT SAME TIME.
HAS LEFT REAR KNOB BROKEN OFF I TURN KNOB WITH FINGER TO TEST THAT THE SPEAKER BANK WORK. DID NOT TEST IT WITH PROPER EQUIPMENT TO TEST ALL FOUR BANKS AT SAME TIME.