Fostex T50RPmk4 Planar Magnetic Headphones

T50RPmk4 Planar Magnetic Headphones — The Fourth Generation of a Studio Original

The T50RPmk4 advances Fostex’s long-running RP monitor platform with a substantially redesigned full-field-driven planar magnetic driver. Its semi-open architecture balances honest monitoring with an open, spacious presentation for mixing, production and serious home listening.

A revised printed-coil pattern expands and equalizes the diaphragm’s active area, while a more extensive magnet array and optimized magnetic circuit suppress unwanted resonance. The result is faster attack and decay, smoother frequency response and more precise spatial placement than earlier generations.

Every Detail Matters

• Fourth-generation, Fostex-manufactured RP planar magnetic driver
• Semi-open symmetrical housings for consistent left/right acoustics
• Cable can connect to either ear cup for easier desktop or studio routing
• Thick low-rebound circumaural pads designed for long sessions

Key Specifications

• Type: Semi-open
• Driver: RP planar magnetic
• Impedance: 28 Ω
• Sensitivity: 97 dB/mW
• Maximum input: 3,000 mW
• Frequency response: 10 Hz–40 kHz
• Weight: Approximately 330 g, excluding cable

System Pairing

These are revealing full-size headphones. A capable headphone amplifier will provide the current reserve, control and low noise needed to hear their full dynamic range. Contact PPA if you would like help matching them to your source or amplifier.

What’s in the Box

• T50RPmk4 headphones
• 2 m OFC unbalanced cable
• 3.5 mm to 6.3 mm adapter
• Manufacturer documentation

Authorized Canadian Fostex Dealer
Princess Pasta Audio supplies genuine Canadian-market Fostex products with authorized dealer support. Available on order; ships within 10 business days.