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The Proton AD-431 is a stereo cassette deck, it was introduced by Proton in 1991 and discontinued 2 years later in 1993.

The main AD-431 features are, tape type selection with support for normal and chrome tapes.

Typical front loading cassette deck with the cassette compartiment located on the left side of the deck. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well.

Compact Cassette

Historic events

1991 Introduction of MiniDisc by Sony
1992 Philips launched the DCC (Digital Compact Cassette) format
1993 Intel introduces the "Pentium" processing chip.

Features of Proton AD-431

Cassette Exterior
Exterior
Orientation Left Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
4 Track / 2 Channel
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Normal Tape Capabılity Chrome Tape Capabılity
Transport
Transport
Mechanical Tape Loading Auto Shutoff

Similar to Proton AD-431 from the period 1991 - 1993