Probably and hopefully not. But it's a good idea to unplug everything, before changing interconnects, and speaker wire too. Some equipment has some voltage build-up on the chassis and the RCA outer shield ring, when it's plugged in and even turned off at times. I've seen them build up to over 50 volts at times. If you bump the RCA's center connector pin to this first, it can easily do damage.
Misconnected interconnect
I took my system apart the other day, and in putting it together I temporarily attached one interconnect from the cd player to the single-ended OUTPUT of the preamp, rather than to the single-ended INPUT.
Fortunately, I discovered the error before I played any music.
The preamp and cd player were both powered at the time (ie, both were "on," but not otherwise in use).
My question is whether what I did could have damaged any of the circuits. Ie, despite not having played any music, is it possible that a brief mis-connection in this way caused damage to any of the circuits. (Assume "standard" forms of wiring, if there is such a thing.)
Fortunately, I discovered the error before I played any music.
The preamp and cd player were both powered at the time (ie, both were "on," but not otherwise in use).
My question is whether what I did could have damaged any of the circuits. Ie, despite not having played any music, is it possible that a brief mis-connection in this way caused damage to any of the circuits. (Assume "standard" forms of wiring, if there is such a thing.)