Silver/Gold
Sony Walkman WM DD-30
The DD line of Sony Walkmans are some of the best sounding portable cassette players due to its design. Using a "disc drive" mechanism allows for very low wow & flutter. It also uses a capstan with a rubber belt attached to the capstan wheel itself therefore eliminating problems belt deterioration over time. This design improves sound quality overall.
DD II was the next model and it included Dolby B NR.
The DD 3 was the first DD Walkman to include a quartz locked motor enabling far better speed control and stability.
DD III in silver
The WM DC2 was introduced with high sound quality in mind. The design based on the DD II, Sony added an amorphous head and Dolby C noise reduction also. The switches on the side is a nice touch making it very similar to the D6C. This player was marketed as a high end player. Like the DD walkmans it has two headphone jack but with the DC2 one was changed to "Line out" allowing users to connect it to an amplifier.
WM DC2
The DD 100 aka Boodo Khan was based on the DD2 design, using the same disc drive capstan and Dolby B noise reduction. The one thing it had that previous DD Walkmans lacked was a bass boost feature. The Dynamic Optimum Loudness was the predecessor to Sony's Megabass. The DD 100 came in a large presentation box with a pair of large headphones. A complete DD 100 in the box with all it's accessories is rare these days.
WM DD 100 (Boodo Khan)
The last of the DD range was the DD 33. Retaining the same features of the DD 30 but with a new curvy modern design. Sony also improved the cassette lid locking mechanism. The DD 33 came in blue, silver and dark grey. The blue is especially rare.
DD 33
