
FOSTEX T50RPmk4CL (Recording Monitor Headphones) (Fostex) (Closed)
Product Condition
Brand New | Unused, as sold. |
---|---|
Mint | Like new, no flaws. |
Excellent | Barely used, very minor wear. |
Very Good | Light wear, fully functional. |
Good | Visible wear, plays fine. |
Fair | Heavy wear, still playable. |
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Description
Description
This product is the latest model of closed-type RP technology headphones, which have continued to evolve for over 50 years since their creation and are used in professional music studios around the world.
The fourth generation of full-surface drive planar diaphragm, independently developed and manufactured by Fostex
The T50RPmk4, equipped with an RP driver, has been redesigned as a long-awaited closed-type model.
These headphones allow you to monitor vocals and instruments in a studio recording or mix with dense sound that suppresses the intrusion of environmental noise, and can be used as closed-back headphones with the accurate reproduction of the original sound that only RP drivers can provide.
* RP and RP technology are proprietary Fostex technologies that move the entire surface of the flat diaphragm in a regular phase (Regular Phase).
● Sealed housing with a unified shape for the T50RPmk4 series The sealed housing is based on the semi-open T50RPmk4 housing, and carefully insulates each ventilation area while meticulously tuning the sound balance.
By ensuring sound insulation, monitoring can be focused on the original sound more precisely.
Furthermore, because the internal shape of the housing is the same for both the T50RPmk4CL and T50RPmk4, you can choose the model that best suits your task or environment, from recording to mixing, without having to worry about the difference in sound between closed and semi-open types.
● RP driver evolved to the 4th generation
RP Technology's full-face drive planar diaphragm driver, which has been continuously improved using its own technology for 50 years, is the fourth generation, and in order to expand and uniform the vibration area of the planar diaphragm, the number of magnets sandwiching the diaphragm has been increased and the pattern shape of the printed coil has been newly designed.
Furthermore, the components of the magnetic circuit have been completely redesigned to optimize the magnetic flux distribution, suppressing unnecessary resonance in the diaphragm and achieving a sharp response at the rise and fall of the sound that is faithful to the original sound.
The fourth-generation driver was developed by fully incorporating the various technologies we have cultivated over the years, achieving improved sensitivity, smooth frequency characteristics that are easy to monitor, and excellent transient characteristics.
By enabling accurate and delicate reproduction of sounds from the deep bass to the high frequencies, the system has achieved even greater accuracy in positioning and sound field reproduction than before.
As always, we provide reliable quality through our in-house manufacturing process.
● Cables can be connected to either the left or right side & housing reduces the difference in sound quality between the left and right sides.Both the left and right housings are equipped with connectors so that the cable can be connected to either the left or right side depending on the usage environment.
In addition, by making the left and right housings the same shape, the difference in sound quality caused by differences in internal structure and volume between the left and right sides due to the presence or absence of a connector is reduced.
The connector is a 4-pole 3.5 mm connector, which supports balanced connections, enhancing usability and versatility. The cable uses high-quality OFC conductors. *A separately sold balanced cable (φ4.4: ET-RP4.4BL) is available.
● Comfortable ear padsThe ear pads are made of low-resilience, around-ear design for a comfortable fit, allowing you to listen comfortably for long periods of time.
Optional ear pads made with Toray Ultrasuede® (EX-EP-RP-SUEDE) are also available.
It is less likely to get sweaty, has a soft feel, and provides smooth, high-quality sound from deep bass to high frequencies.
Type: Closed dynamic type Driver: RP type Planar diaphragm Impedance: 28 Ω
Sensitivity: 97 dB/mW
Maximum input: 3,000 mW
Frequency response: 10 to 40,000 Hz
Weight: Approx. 330 g (excluding cable)
Accessories: φ3.5 mm (4-pole) ⇔ φ3.5 mm (3-pole) stereo phone cable (2 m) × 1, φ3.5 mm → φ6.3 mm stereo phone conversion connector × 1, Safety Precautions
Payment & Security
Payment methods
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Regarding detailed information and contact information to us, please check FAQ.
Please Note
The following information applies to international orders.
■ Condition
Items with “USED” in the product name are pre-owned and will be delivered as shown in the photos. Signs of wear may be present. All items are function-tested by our staff and rechecked before dispatch.
■ Stock
Many products are stocked across Ikebe stores in Japan. As a result, shipment may take several days. In-store sales may also cause items to sell out. If an item is unavailable, we will contact you promptly; in that case, the order will be canceled and any payment will be refunded.
■ Shipping
We ship via FedEx. Shipments are fully insured against damage or loss during transit.
- Asia: 10–20 days (estimated)
- North America & Oceania: 20–30 days (estimated)
Shipping costs are calculated based on the delivery address and confirmed at the time of dispatch.
■ Taxes & Duties
Import duties, taxes, and fees are the buyer’s responsibility and are not included in the item price or shipping cost. These fees are typically collected by the carrier upon delivery or at pickup. Please check with your country’s customs office for details before purchasing.
■ Other
We cannot declare a reduced item value or mark purchases as gifts.
* Warranty
Our product warranty is valid only within Japan.
* Voltage
All electrical products are intended for the Japanese market and are designed for 100 V operation.

About us
Founded in 1975, Ikebe Music is one of Japan's largest general music stores.Thanks to its long history and proven track record, it has earned the trust of musicians and music fans not only in Japan but around the world.
Ikebe Music ships not only within Japan, but also overseas.As a well-known retailer of used musical instruments in Japan, we have a wide selection of used and vintage instruments.
We have a wide variety of unusual and rare instruments, so please take a look.Please note that we do not list new products, as our contracts with our suppliers prohibit international shipping.
About our stores
In Japan, we have about 30 stores in Tokyo (Ikebukuro, Shibuya, Akihabara) and Osaka.
We have just opened our flagship store, IKESHIBU (IKEBE SHIBUYA), in Shibuya, Tokyo, which brings together numerous musical instrument specialty stores and serves as a hub for entertainment culture.
Please be sure to stop by if you are visiting Japan.


About Shipping





We carefully pack every item with protective materials to ensure it arrives safely.
The photos above show an example of how we securely pack a bass guitar for shipping.