The Kenwood GE-540 is a stereo graphic equalizer manufactured by Kenwood Corporation. It allows users to adjust the frequency response of audio signals across different frequency bands, usually used in audio systems to improve the sound quality. The GE-540 features a range of independent sliders or controls for each frequency band, allowing precise adjustment of the audio output. It is designed to be compatible with various audio devices such as amplifiers, receivers, and CD players.