Fostex / TH818

Variations

＜＜April 2026 New Product！＞＞The TH818 is a premium standard model headphone developed to deliver the overwhelming resolution and superb sound quality of the flagship headphones TH910/TH919 to a wider audience.

■Acacia Solid Wood Housing Inheriting the Core of the Flagship's Sound
・To achieve the same exquisite tone as the hard maple solid wood housing finished with traditional lacquerware used in the TH910/TH919, but without the application of lacquerware, we selected acacia solid wood from among various woods. Acacia, known for its attractive resonance and used in guitars and ukuleles, allows you to enjoy the solid, deep bass and clear, expansive treble inherited from the TH910/TH919. The open-type TH818 features a matte anodized aluminum material with a geometric pattern inspired by kumiko (traditional Japanese woodworking) at the housing opening. A precise two-layer structure with laser-cut mesh processing and meticulous adjustment of the opening ratio and internal parts reproduces a natural sound field with high resolution and reduced listening fatigue, befitting an open-type design.

■ Newly Developed 50mm BioDyna Driver
- The BioDyna driver, which has received high praise for its high resolution and extremely smooth sound quality, has been significantly improved. By improving amplitude stability with a newly developed edge, it enables a tight and controlled expression without excessive bass bloat. Furthermore, by suppressing unwanted resonance, it eliminates muddiness caused by extraneous sounds and achieves a natural and smooth midrange. You can enjoy a high-density, clear, and smooth sound quality that captures all the musical information, from tight bass with volume and depth, to transparent and clear midrange and lustrous treble.

■ Lightweight Magnesium Alloy Mechanical Components
- Magnesium alloy is used for mechanical components such as the housing's base plate and hanger, reducing weight by 20% compared to aluminum alloy. In addition, rubber gaskets are used in the rotating mechanism to minimize unwanted vibrations. Improvements have been made to the user experience through a design philosophy that pays attention to the details of each component.

■ Newly Shaped Ear Pads with New Materials
- The newly shaped ear pads have a slanted shape on the surface that touches the face to optimize the fit. The internal low-rebound urethane has a two-layer structure, with a softer layer on the outside and a highly elastic layer on the inside to conform to the shape of your face. In addition, the use of silk protein synthetic leather, which boasts three times the durability of conventional materials, ensures comfortable wear even during extended listening sessions.

■ Supple and Comfortable Headpad and Headband
- The headpad and headband are made of natural sheepskin. This provides a supple and comfortable fit, and you can enjoy the changing texture as you use them.

■ Includes a Unique High-Purity OFC Unbalanced 2-Pole 3.5mm Y-Cable
- The internal wiring and the included unbalanced cable utilize 7N (99.99999%) grade high-purity OFC (Oxygen Free Copper) cable, which eliminates impurities to the greatest extent possible to enhance transmission capability. Furthermore, optional 4.4mm balanced cable ET-TH4.4BL2Y and XLR balanced cable ET-TH-XLR2Y are also available.

■Model: TH818 = Open Dynamic Type
■Driver: Φ50 mm Neodymium Magnet / Biodynamic Diaphragm
■Impedance: 25 Ω
■Sensitivity: TH818 = 100 dB/mW (Provisional)
■Maximum Input: 1,800 mW
■Frequency Response: 12.5-45,000 Hz
■Weight: Approx. 385 g (excluding cable)
■Cable: Cable: Φ3.5 mm (2-pole) mini plug x2 (L,R) ⇔ Φ6.3 mm gold-plated stereo plug / High-purity OFC 2 m x1
■Accessories: Leather-like pouch, safety precautions, quick manual