The Aiwa AV-D77 is a high-end digital receiver that was introduced in the late 1990s. It offers a variety of features that make it an excellent choice for audio enthusiasts:1. Digital tuner: The AV-D77 uses a digital tuner, which provides superior sound quality compared to analog tuners. It also allows for stored presets and automatic station scanning.2. AM/FM tuner: The AV-D77 is a dual-band tuner, with AM and FM presets. This allows users to listen to a wide range of stations.3. CD player: The AV-D77 includes a CD player with programmable playback, which uses the popular CD digital audio format.4. Graphic equalizer: The unit has a 6-band parametric equalizer, which allows users to customize the sound to their liking.5. Input/output connectivity: The AV-D77 provides a variety of input and output connections, including coaxial and optical digital, composite video, S-video, and RCA inputs and outputs.6. Remote control: The unit comes with a handy remote control that provides easy access to all functions.7. Large LCD display: The AV-D77 has a large, easy-to-read LCD display that provides all of the necessary information, including station name and track information for CD playback.Overall, the Aiwa AV-D77 is a well-balanced audio system that offers a good mix of digital and analog features. It is a versatile receiver with a powerful sound that is ideal for home audio enthusiasts.