The Marantz SM 500 is a solid-state power amplifier designed for high-fidelity audio reproduction. It features a robust build quality with a classic design, characterized by its distinctive Marantz aesthetics including gold accents and a spacious front panel. The amplifier is well-equipped to deliver substantial power output, offering high current capability for the most demanding speakers. It has a low total harmonic distortion (THD) rating, contributing to a clean and accurate sound. The SM 500 is commonly appreciated for its dynamic range, ability to handle peaks in music, and its overall sonic clarity. It operates in a class AB configuration, which balances efficiency and sound quality, making it suitable for various audio setups. Important specifications typically include an output power rating of around 100 watts per channel at 8 ohms with an adequate damping factor, ensuring control over speaker movement. It may include features such as a protection circuit, input level controls, and speaker binding posts for secure connections. Overall, the Marantz SM 500 is recognized for its performance and historical significance within audio circles.