NW-E063K

The NW-E063K is a twelfth-generation E Series Network Walkman with 4 GB storage supporting MP3, WMA, and AAC. It matched the E063's 30-hour lithium-ion battery and digital noise cancellation while adding speaker output and the lighter, thinner body.

The speaker-equipped K model completed the 4 GB tier of the refined E050 generation. It extended basic playback with built-in audio without altering the core platform refinement. Like the other K variants, it shows how stable the core player already was. Sony was no longer trying to discover what an entry-level Walkman should be. It had already figured that part out.