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UPDATE, 5/22

Update:

- Took the amps apart to double check reverting the mod.
- Someone removed all components of the phase inverter from the circuit board, and wired it straight to the XLR on the back panel.
- Damn.

So, there is no easy switch back to RCA/Single ended input (apart from calling ARC, ordering parts, and reinstalling them). What a bad mod. Why they did not just jumper over the PI circuit is beyond me.

The plan may now be either: 1) sell the output tubes and junk the amps (recycle?) 2) Find someone willing to pay for the shipping boxes (expensive from ARC, probably worth it) and some nominal fee for the amps.

Thanks so far for all of your suggestions and opinions, they have been thought provoking.



Edits: 05/22/25
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