Fostex EX-EP-RPmk3 are OEM replacement ear pads made exclusively for the RPmk3 headphone line — T50RPmk3g, T50RPmk3n, T40RPmk3n, and T20RPmk3n. They are not compatible with any earlier mk2 or mk1 variants. When the stock pads wear out, the acoustic chamber geometry shifts, the lateral clamping force drops unevenly, and the low-frequency seal deteriorates. These pads restore the headphones to their original mechanical and acoustic specification — not an approximation of it.
Acoustic chamber integrity on planar magnetic drivers
Planar magnetic transducers are particularly sensitive to the volume and seal of the ear cavity. Any deviation in pad thickness, density, or contact profile alters bass extension and tonal balance in ways that are audible during critical monitoring. Because EX-EP-RPmk3 pads are precision-matched to the RPmk3 cup dimensions, the acoustic chamber returns to the exact geometry the driver was tuned for. For T50RPmk3 users doing mix work, this means the low-end reference and stereo imaging behave as expected — not as a function of pad wear state.Straightforward replacement with no tooling required
The mounting system is a stretch-and-clip design: pull the old pad away from the cup rim, align the new one and press the rear flap back over the edge. The process takes about a minute per side with no risk of cracking the plastic housing or stripping threads. The low-rebound foam restores the original clamping pressure distribution, which directly affects both comfort over long sessions and the consistency of the acoustic seal across different head shapes.KEY FEATURES
- OEM Fostex replacement — factory-matched dimensions and materials for the RPmk3 series
- Low-rebound foam core — even lateral pressure distribution, reduced listening fatigue
- Soft leatherette outer cover — reliable acoustic seal and durability
- Full restoration of planar driver acoustic chamber geometry
- Tool-free installation — stretch-and-clip mounting onto the cup rim
- Sold as a matched pair
- mk3n series exclusive — not compatible with T20RPmk2, T40RPmk2, or T50RP
TECHNICAL SPECIFICATIONS
- Model: EX-EP-RPmk3
- Outer material: Leatherette (black)
- Cushion type: Low-rebound urethane foam
- Color: Black
- Compatible models: T50RPmk3g, T50RPmk3n, T40RPmk3n, T20RPmk3n
- Package contents: 2 ear pads (one pair)
- UPC: 636827306867
