Fostex have long since used RP (Regular Phase) diaphragm technology in their acclaimed professional studio headphones such as the T20RPmk2 and the recent T-series models.

The new TH500RP model now combines this RP technology with the design philosophy and flair of the TH900, resulting in a set premium headphones which deliver a simply stunning high resolution sound, with sparkling highs, rich mid tones and high quality lows.