The Marantz PM-45 is an integrated amplifier that was part of the company's product line during the 1980s. It features a dual power supply and is designed to deliver high-quality audio performance. The unit typically includes multiple inputs, allowing users to connect various audio sources. It is built with a focus on delivering clear sound, and its design is characterized by a classic aesthetic that appeals to audiophiles and collectors. The PM-45 often includes tone control features and a power output sufficient for driving standard speakers effectively.