Fostex T50RPmk4 Planar Magnetic Semi-Open Headphones

Styled in black, the T50RPmk4 from Fostex is the latest iteration of the company's highly regarded Regular Phase (RP) series of headphones, now equipped with a completely redesigned RP planar magnetic driver. The headphones utilize proprietary technology in order to ensure an accurate reproduction of sonic material, thereby rendering these semi-open headphones suitable for monitoring in studio situations. To ensure a full representation of the sonic spectrum, these headphones have a frequency response of 10 Hz to 40 kHz.

• The RP technology planar magnetic driver, first developed over 50 years ago and refined continuously throughout the years, has now hit its 4th generation.
• A new printed coil pattern shape has been employed to expand and equalize the vibration area of the flat diaphragm. Additionally, the number of magnets that sandwich the diaphragm has been increased substantially.
• Furthermore, the components of the magnetic circuit have been redesigned to optimize their magnetic flux distribution, suppressing unnecessary resonance and achieving an even better transient response.
• This 4th generation driver was developed by fully incorporating various technologies cultivated over the years, simultaneously achieves improved sensitivity, smooth frequency response, and superb transient characteristics.
• By accurately and delicately reproducing elements all across the frequency spectrum, the soundstage and localization have also been improved. The new driver is also more efficient, requiring less power from the headphone amplifier to achieve peak performance.

• Both the left and right housings are equipped with connectors for the supplied cable, so that the cable can be connected to either the left or right depending on the usage environment.
• In addition, by making the left and right housings symmetrical, the difference in sound characteristics, usually caused by differing internal structures between sides, has been eliminated.
• The connector is equipped with a TRRS 3.5mm connector, which supports balanced connections, increasing ease of use and versatility. The cable uses high-quality OFC conductors.

The new thicker ear pads feature a low-resilience around-the-ear design that provides a comfortable fit, making them comfortable to use even when listening for long periods of time.