preamplifier

[ pree-am-pluh-fahy-er ]
/ priˈæm pləˌfaɪ ər /

noun

a device in the amplifier circuit of a radio or phonograph that increases the strength of a weak signal for detection and further amplification.

Origin of preamplifier

First recorded in 1930–35; pre- + amplifier

British Dictionary definitions for preamplifier

preamplifier
/ (priːˈæmplɪˌfaɪə) /

noun

an electronic amplifier used to improve the signal-to-noise ratio of an electronic device. It boosts a low-level signal to an intermediate level before it is transmitted to the main amplifier Sometimes shortened to: preamp