The WM-FX325 was the most comprehensive of a series of four similar models, the others being the WM-FX121, the WM-FX123 and the WM-FX323. In addition to the features of the latter model, the WM-FX325 included Dolby B NR and variable “mega bass” loudness controls. The extra knobs and switches required for these functions were all fitted on the cassette door. Text copyright © Walkman Central. Unauthorised reproduction prohibited.