The Sansui 500 is a combination vacuum-tube amplifier and receiver, popular among audio enthusiasts for its quality sound and vintage charm. It typically includes multiple inputs such as phono, auxiliary, and tape monitor, making it versatile for connecting various audio sources. The unit is known to require maintenance, particularly the replacement of aging electrolytic capacitors, which can impact performance if not addressed. Many enthusiasts appreciate the smooth audio characteristics and engaging performance that the Sansui 500 can deliver, even in unrestored condition. Reports indicate that it's considered a worthwhile project for restoration, offering a satisfying listening experience once refurbished. The model features four power amplifier tubes, specifically ECL82/6BM8, and operates with a B+ voltage around 250-255V. An optional aftermarket service manual is often included to assist with restorations. Its compact size makes it a feasible project for individuals initiated in tube audio restoration, yet its age encourages careful handling and replacement of certain components to prevent damage and enhance reliability.