Walkman: A História Ilustrada (1979–2004) A timeline of Sony’s cassette Walkman models from 1979 to 2004 - EP.10 - 1984: SONY WALKMAN WM-DC2

 

Also released that year, the WM-DC2 added both Dolby B and Dolby C. Custom ICs

 supported the system, while a laser amorphous head improved durability and playback

 accuracy. A dedicated line-out signaled its professional intent.

Walkman: A História Ilustrada (1979–2004) A timeline of Sony’s cassette Walkman models from 1979 to 2004 - EP.9 - 1984: SONY WALKMAN WM-DD2

 

Released in 1984, the WM-DD2 added Dolby B using miniature ICs powered directly by its 3-volt

 supply. Doing so required a full internal redesign. Later DD models refined the sound further, but

 the DD2 marked the first jump in fidelity for the Disc Drive line.

Walkman: A História Ilustrada (1979–2004) A timeline of Sony’s cassette Walkman models from 1979 to 2004 - EP.8 - 1983: SONY WALKMAN WM-10

 

Introduced in 1983, the WM-10 shrank the Walkman to cassette-case size. That scale came

 from aggressive miniaturization, including a flat disc motor and a bearing integrated into the

 supply spool. Despite its size, it offered Dolby B, supported normal, chrome, and metal tapes,

 and included auto-stop. The tradeoff was durability, an issue Sony later addressed in follow-up

 designs.