Professional over-ear dynamic stereo headphones with 40 mm drivers. The headphone drivers, housings, and other elements have been newly designed from the ground up, and specially tuned by the expert headphone designers at Fostex for the very best audio performance. Veteran Fostex fans will recognize the distinctive Fostex-signature ''slider bars'' which are also a nod to the design cues of the long-running T-RP series. Each pair of TR series headphones comes with two sets of ear pads for customizability by the owner: a set of standard-thickness pads and a set of extra-thick ear pads. Each pair of TR series headphones also includes two different detachable, locking headphone cables: both a coiled cable and a straight one. Frequency response: 5 Hz - 35 kHz. Sensitivity: 90 dB / mW. Impedance: 80 Ohm. Max. SPL: 100 mW. Weight: 302 g. Colour: Black