unplugged

Of or involving the performance of music using acoustic instruments, sometimes amplified through microphones.

Having the plug removed; also, not plugged: in electrical testing, said of a resistance when the plug which short-circuits the coils of wire forming the resistance in the box of resistance-coils is taken out.

Not plugged in.

Using acoustic instruments, especially in lieu of electric ones.

Simple past tense and past participle of unplug.