The JVC RX-503 is a stereo receiver that was popular in the late 1980s and early 1990s. It features a robust design and is part of JVC's lineup targeting audiophiles looking for a mid-range receiver. The RX-503 is capable of delivering up to 100 watts per channel into 8 ohms, providing a powerful sound suitable for various audio setups. It includes multiple inputs, such as phono, CD, and tape, allowing connectivity for different sources. The receiver supports AM/FM radio and generally has a 30-preset memory for radio stations. It is also equipped with a tone control section for adjusting bass and treble, enhancing user control over sound customization. The unit typically comes with a remote control for convenient operation and has a built-in headphone jack. The build quality is solid, often featuring a metal chassis and a user-friendly interface with backlit display for easier viewing in low light. Overall, the JVC RX-503 is a reliable option for those seeking quality sound in a stereo receiver format.