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Converts DH-220 to high-power monophonic amp, delivering 400W into 8 ohms.
Details input/output connections for mono, and grounding precautions for floating output.
Advises on speaker fuse replacement, with 7A as max recommended for sustained power.
Disconnect power, wait for discharge, remove amplifier module covers for access.
Rewiring of right input socket and PC-19 board connections for mono operation.
Connecting green wire to board "B", mounting switch, and preparing wiring.
Mounting switch bracket, connecting resistor between lugs #4 and #5.
Reinstalling modules, routing wires, and connecting switch lugs.
Setting switch for mono/stereo and reinstalling amplifier cover.
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