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Disassembly

Two screws and the shell splits apart. Inside: a simple 3-wire cable running from one ear to the other over the headband. Since RCA plugs are mono by tradition, I didn't need the crossover wire — cut it off. Mapped the original cable path and isolated the strain points that had been causing failures.

Chassis prep

The next step was making the cups accept hardware they were never designed for. I widened the original cable entry point and used it for the first RCA jack, which kept the conversion tied to the stock geometry instead of forcing a completely new layout.

The opposite cup needed a matching opening, so I measured as sensibly as possible and aimed for something that looked deliberate, cleared the internals, and would survive repeated cable swaps without stressing the shell.
(drilled at random)

Socket fit

One hitch: the RCA plug was a bit too large and wouldn't clear the speaker driver with the nut in place. It torqued well into the shell and had more than enough leverage on the nut, so I took the Dremel to it — shaved some metal off the nut until everything fit flush.

Final wiring

With the hardware sorted, the wiring became the cleanest part of the whole job. Each RCA jack got a direct solder run to its driver, with no intermediary board, no extra junctions, and nothing in the signal path that did not absolutely need to be there.

Before closing everything back up, I checked continuity on both channels and made sure the conversion behaved like a proper finished mod instead of a temporary bench fix.