Wiktionary
unamplified
a. Not amplify
Usage examples of "unamplified".
Many people prefer to exercise this need by listening to live, unamplified music.
Wondering, he did so, and he heard her start to play her Strat, the unamplified instrument chiming like a quiet harp.
She whacked out a series of power chords on her guitar, mentally turning the faint, unamplified twang into the full-throated roar of the Laney.