Fostex Corp. T40RPmk3 (EA) Headphone Closed Type Monitor

Closed-back headphones built for studio-grade accuracy
The Fostex T40RPmk3 headphones are designed for audio professionals who need detailed monitoring with superior isolation. Featuring a closed-back construction and Fostex's proprietary RP diaphragm technology, these headphones are ideal for critical listening in environments where bleed and background noise must be controlled—such as tracking sessions, editing suites, or mobile production work.

Proprietary RP drivers deliver accurate sound reproduction
At the core of the T40RPmk3 is a copper-foil-etched polyimide film driver powered by a neodymium magnet. This Regular Phase (RP) driver provides clear, balanced audio with minimal distortion, maintaining consistent performance across a wide frequency range. Designed for reference listening, it captures low-end details and high-frequency textures with precision, making it suitable for studio monitoring, mixing, and live sound engineering.

Closed-back design for noise isolation and focused low-end
The closed earcups not only block out external noise but also emphasize a tighter and more pronounced low-frequency response. This helps engineers hear the subtle punch of kick drums, basslines, and lower harmonics without ambient interference. The isolation also benefits performers who need to monitor tracks clearly while recording vocals or instruments.

Comfortable fit for extended use in professional settings
Fostex reengineered the headband and ear cushions on the RPmk3 series for enhanced comfort and durability. The ear pads are made from low-repulsion materials that minimize pressure on the head and ears, allowing for longer sessions without fatigue. Whether you’re in the studio for an hour or an entire day, the T40RPmk3 stays comfortable and secure.

Detachable cable system for convenience and longevity
To improve serviceability and adaptability, the T40RPmk3 comes with a detachable cable design. Included are two cables—a 3-meter cable with a 1/4-inch plug for studio gear, and a shorter 1.2-meter cable with a mini-plug for portable setups. This flexibility ensures seamless transitions between professional and personal environments.

Extended frequency response for high-resolution audio
With a frequency response of 20 Hz to 35 kHz, these headphones capture sonic detail across the spectrum, allowing for full-range monitoring of music, post-production mixes, and broadcast material. The enhanced range supports high-definition audio playback, revealing nuances often missed with conventional headphones.

Purpose-built for studio monitoring and tracking
From home studios to commercial production houses, the Fostex T40RPmk3 is a dependable solution for engineers, producers, and musicians looking for a closed-back monitoring option that doesn’t compromise on clarity or comfort. Its blend of isolation, accuracy, and durable design makes it a reliable addition to any professional audio setup.