A device designed to increase the amplitude of an audio signal, particularly one incorporating a dedicated circuit to accommodate the low-level output of a turntable, is a specific audio component. This allows direct connection of a record player, circumventing the need for an external pre-amplifier or signal booster. Such devices are commonly integrated into stereo receivers, integrated amplifiers, or even stand-alone pre-amplifiers intended for vinyl playback.
The inclusion of a specialized stage corrects the RIAA equalization curve inherent in vinyl recordings, restoring the audio signal to its original frequency balance. Historically, this feature was standard in most audio amplification systems, reflecting the dominance of vinyl as a music format. As other sources became prevalent, its inclusion became less common, making its presence a notable characteristic for enthusiasts of analog audio reproduction. The benefit lies in providing a simplified and optimized signal path for vinyl playback, leading to improved audio quality.