Fostex / T50RPMK4

FOSTEX / T50RPmk4 is a next-generation monitor headphone with a significantly renewed RP driver, which is a fully-driven flat diaphragm that was originally developed. The RP driver has expanded into various models and has been recognized by musicians and engineers in music studios around the world as monitor headphones.

Scheduled to be released in late May 2024

■RP driver evolved to the 4th generation
・RP Technology's fully-driven flat diaphragm driver, which has been improved over 50 years, is now in its 4th generation.In order to expand and equalize the vibration area of ​​the flat diaphragm, the number of magnets that sandwich the diaphragm has been increased and the pattern shape of the printed coil has been newly designed. By focusing on the behavior of the diaphragm, we created a new shape for the parts that make up the magnetic circuit, optimized the magnetic flux distribution, and controlled the plane diaphragm to suppress unnecessary resonance and achieve sharp rises and falls. The 4th generation driver, which was developed by fully incorporating various technologies cultivated over the years, has simultaneously achieved improved sensitivity, smooth frequency response, and excellent transient characteristics, and by accurately and delicately reproducing everything from deep bass to treble, it has further improved the sense of accurate localization and the ability to reproduce the sound field than before.

■Symmetrical housing shape reduces sound quality differences
-Differences in the left and right housing shapes due to the shape of the cable connection, etc., will cause differences in the internal structure and volume of the left and right, which will affect the sound quality, so we have adopted housings with the same shape on the left and right so that there is no difference in sound quality between the housings. In addition, the 3.5mm connector allows the cable to be swapped between the left and right sides depending on the usage environment, making it compatible with balanced connections, increasing ease of use and versatility. The cable uses high-quality OFC conductors. Optional balanced cables are available: φ2.5: ET-RP2.5BL, φ4.4: ET-RP4.4BL, XLR: ET-RPXLR.

■Comfortable ear pads
・The ear pads are designed to be comfortable to wear, with a low-repulsion around-ear design, making them comfortable to use even when listening for long periods of time.


・Model: Semi-open type
・Driver: Dynamic, RP method flat diaphragm
・Impedance: 28Ω
・Sensitivity: 97dB/mW
・Maximum input: 3000mW
・Frequency characteristics: 10-40,000Hz
・Weight: 330g (excluding cable)
・Accessories: 3.5mm (4-pole) ⇔ 3.5mm (3-pole) stereo phone cable (2m) x 1, 3.5mm → 6.3mm stereo phone conversion connector x 1