If you provided the instruction manual, and the buyer read it, hopefully there was a warning in there that pulling the plug *may be a Bad Thing. I'd be really surprised if it actually caused damage. IME, this is more likely w/ equipment that has, as mentioned, microprocessors. Typically, even when switched "off", there is still a sleeper circuit that stays on to maintain memory functions, settings, presets, and for VCR's a space heater to keep the interior warm and dry. Looking at schematics for amps and preamps, they may be a little more tolerant of hard shutdowns, but even then, they may have a warmup delay to prevent DC thumps through the system.
The McCormack UDP-1 has a front standby switch, and they warn against pulling the plug before going to the standby position. The Parasound T3 tuner, doesn't have a standby switch, but even after powering down, can be very cranky about swapping cords; losing it's display and memory.
RTFM, dummy, is still as valid as ever...
The McCormack UDP-1 has a front standby switch, and they warn against pulling the plug before going to the standby position. The Parasound T3 tuner, doesn't have a standby switch, but even after powering down, can be very cranky about swapping cords; losing it's display and memory.
RTFM, dummy, is still as valid as ever...