Crossword Genius

Sound system booster (3)

Ross

I believe the answer is:

amp

(Other definitions for amp that I've seen before include "measure of power" , "Map of electrical unit" , "Current; hi-fi kit" , "Sound-boosting piece of equipment (abbr)" , "Map about electric unit" .)

I've seen this clue in the Newsday.com and the Newsday.
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