The latest B-Series additions feature a one-touch bass boost ... Sony's new Walkman B Series players get even more ... (US$47). The NWZ-B163/B163F has 4GB of storage and costs GBP35 (US$57).

Sony has unveiled a slate of new Walkman MP3 players today, with the launch of its B170 Series. Available in both 2GB and 4GB varieties, these new devices weigh in at just 28 grams, but apparently ...

The WM-B39, meanwhile, was the first to feature the brilliantly named "mega-bass" which was designed to improve audio quality on the worst headphones. If you had this, you'd be listening to N.W.A ...