{"product_id":"fostex-t50rpmk4cl","title":"Fostex T50RPmk4CL","description":"\u003cdiv lang=\"en\"\u003e\n\u003cstrong\u003eFostex T50RPmk4CL\u003c\/strong\u003e is the first closed-back variant of the T50RPmk4 platform — the fourth-generation RP driver in an enclosure sharing the same internal geometry as the T50RPmk4, with ventilation ports sealed and a separate acoustic calibration applied for the closed-back loading condition. The primary use case is studio tracking — vocal and instrument recording sessions requiring isolation — and dense monitoring environments where the semi-open T50RPmk4 bleeds too much ambient sound. The symmetrical housing with bilateral 4-pole 3.5 mm sockets is carried over unchanged from the T50RPmk4.\n\n\u003ch3\u003eUnified housing geometry — the deliberate engineering decision\u003c\/h3\u003e\nFostex built the T50RPmk4CL by taking the T50RPmk4 housing, sealing the ventilation points, and re-tuning the acoustic balance for the sealed chamber rather than designing a new enclosure from scratch. The practical consequence is significant: an engineer alternating between the T50RPmk4 for mixing and the T50RPmk4CL for tracking does not need to compensate for tonal differences caused by divergent housing geometries — both pairs share the same mechanical platform and the same fourth-generation driver. The redesigned printed coil, increased magnet count, and optimized flux distribution of the fourth-generation driver maintain fast attack and decay regardless of enclosure type, making the T50RPmk4CL a reliable tracking tool for acoustic instruments and vocals where transient accuracy directly affects punch-in decisions.\n\n\u003ch3\u003eConnector system and cable flexibility\u003c\/h3\u003e\nBoth earcups carry 4-pole 3.5 mm sockets supporting balanced connections. The included OFC cable is unbalanced (4-pole to 3-pole), but the headphone itself is balanced-ready without modification. The optional ET-RP4.4BL balanced cable (4.4 mm Pentaconn) connects directly. Symmetrical housing eliminates the internal acoustic asymmetry between left and right earcups that affects many headphones with single-sided cable routing — a meaningful advantage for critical monitoring where channel matching matters. Angled low-rebound ear pads are included as standard; optional Ultrasuede EX-EP-RP-SUEDE pads are available separately.\n\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4th-generation RP planar driver — unified with T50RPmk4, fast transients, smooth monitoring frequency response\u003c\/li\u003e\n\u003cli\u003eClosed-back housing derived from T50RPmk4 — same internal geometry, separate acoustic calibration\u003c\/li\u003e\n\u003cli\u003eFull ambient isolation — vocal and instrument tracking, monitoring in loud studio environments\u003c\/li\u003e\n\u003cli\u003eSymmetrical housing with bilateral 4-pole 3.5 mm sockets — no L\/R acoustic asymmetry\u003c\/li\u003e\n\u003cli\u003eOFC cable 2 m + 6.3 mm adapter included; optional ET-RP4.4BL balanced cable (4.4 mm) available separately\u003c\/li\u003e\n\u003cli\u003eAngled low-rebound circumaural ear pads — comfort over extended sessions\u003c\/li\u003e\n\u003cli\u003eOptional Ultrasuede EX-EP-RP-SUEDE ear pads available separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModel: T50RPmk4CL\u003c\/li\u003e\n\u003cli\u003eDriver type: Planar magnetic RP (Regular Phase), 4th generation\u003c\/li\u003e\n\u003cli\u003eDesign: Closed-back\u003c\/li\u003e\n\u003cli\u003eImpedance: 28 Ω\u003c\/li\u003e\n\u003cli\u003eSensitivity: 97 dB\/mW\u003c\/li\u003e\n\u003cli\u003eFrequency response: 10 Hz – 40,000 Hz\u003c\/li\u003e\n\u003cli\u003eMaximum input power: 3,000 mW\u003c\/li\u003e\n\u003cli\u003eEarcup connectors: 2x 4-pole 3.5 mm (symmetrical bilateral)\u003c\/li\u003e\n\u003cli\u003eWeight: approx. 330 g (without cable)\u003c\/li\u003e\n\u003cli\u003eIncluded accessories: OFC cable 3.5 mm (4-pole to 3-pole, 2 m), 3.5 mm to 6.3 mm adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"FOSTEX","offers":[{"title":"Default Title","offer_id":53693025616209,"sku":"59507","price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/FostexT50RPmk4CL1.jpg?v=1777977004","url":"https:\/\/wrdtunes.com\/fr\/products\/fostex-t50rpmk4cl","provider":"Wired Tunes","version":"1.0","type":"link"}