WM-WX88

The WM-WX88 launched Sony's WX wireless series in 1991 as a cassette Walkman built around physical separation between the playback mechanism and the listener. The main unit housed the cassette transport, EX Amorphous head, auto-reverse system, and standard controls, while a separate splash-resistant wireless receiver and earphones handled listening and operation. Sony also supplied a movable waterproof storage pouch so the player itself could stay protected while the user remained mobile, making the overall system feel less of a single device and closer to a compact portable setup.

This is a very revealing model because it shows Sony starting to treat the Walkman less as one object and more as a distributed experience. Instead of simply making the player tougher or smaller, the WX88 reorganized where the vulnerable and usable parts of the system actually lived. It reads as one of those strange but genuinely forward-looking side branches that only makes sense once the basic cassette Walkman had already become fully mature.