WM-GX400

The WM-GX400 is an entry-level recording Walkman that combined cassette recording and playback with AM/FM radio, a built-in microphone, and stereo speakers in a compact plastic body. The layout remained simple and practical, with basic controls for recording from radio or microphone input and enough portability to keep it useful away from a desk. It was not especially slim or premium, but it carries forward the GX branch's long-standing role as the "do more than listen" side of the Walkman family.

What makes the GX400 revealing is that it shows how cassette recording had narrowed into a smaller but still very real everyday niche by the early 2000s. Here, a machine for quick notes, casual radio capture, and compact shared playback, not for audio enthusiasts or collectors. It reads as one of the last ordinary tape tools in Sony's lineup.