The Pioneer SR-101 is a vintage stereo receiver known for its features and sound quality. It offers multiple input options including phono, tape, and auxiliary, along with a built-in AM/FM tuner. The unit typically includes power output ratings in watts per channel and possesses tone control settings for bass and treble adjustments. Its design is characterized by a classic look with physical knobs and switches, contributing to its durability and user-friendly interface. The SR-101 is often appreciated by audio enthusiasts for its performance in driving speakers effectively, providing a warm and dynamic sound.