The Marantz 3600 is a stereo preamplifier that was part of Marantz's line of audio equipment, aimed at providing high-quality sound reproduction. It features multiple input options, allowing users to connect various audio sources. The design typically includes tone control capabilities and various output formats to drive power amplifiers or tape decks. The build quality is notable, often featuring a solid metal chassis and a front panel with analog dials and switches for user-friendly operation.