Guitar Out -> Zoom 802.1u -> BOSS RC-3 -> to the Input of Blackstar HT1-R, it destroys the amp.
The amp only makes rasp Sounds.
I checked the valves - they are all right. I think the input circuit has a damage? Up left corner of the circuit diagram: Any ideas?
Is there a support forum for techs/engineers?
Do you have a repair plan?
Discussion - HT-1 amplifiers
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