Premium open-back headphones featuring a proprietary bio-dynamic diaphragm, with acoustic tuning that unlocks its full potential.
A lacquered Bordeaux finish housing that delivers premium sound quality and the joy of ownership
The surface finish of the wooden parts is achieved using a lacquer craft technique uniquely developed by Sakamoto Otosho Shoten Co., Ltd., a company founded in 1900 (Meiji 33) that applies traditional Japanese craftsmanship to modern industrial products. The lacquer used consists of a base black lacquer and an adhesive lacquer for applying the foil. To express a sophisticated sense of depth, several types of silver foil, smoked with sulfur, are applied in a torn-paper-like manner.
Wood Type: Mizume Cherry
A premium wood species native to Japan, derived from a variety of the birch tree (Betula). Known for its fine, dense grain and hardness, Mizume Cherry yields a beautiful surface finish, making it ideal for furniture manufacturing. For the TH909, skilled artisans meticulously hand-finish each piece.
Features a BioDyna diaphragm utilizing ultra-fine bio-cellulose fiber material
Leveraging expertise accumulated over many years, we blend bio-cellulose fiber with other fibers under optimal conditions. This achieves low specific gravity, high Young’s modulus, and high internal loss. Alongside delicate, high-resolution reproduction of beautiful mid-to-high frequencies, the adoption of a free edge with excellent linearity faithfully reproduces even large-amplitude low-to-mid frequencies.
Bio-cellulose fibers are produced using advanced biotechnology. Each fiber has a thickness of 20 to 50 nm (nanometers), making it an ultra-fine fiber approximately 1/1000th the thickness of natural plant fibers (such as cotton). This fiber is highly pure alpha-cellulose, containing almost no harmful impurities and exhibiting the highest level of crystallinity.These ultra-fine bio-cellulose fibers possess exceptional capabilities for reproducing mid-to-high frequencies. Combining them with various other fibers in appropriate blends allows for the creation of sound quality that integrates the characteristics of each fiber, enabling the production of sound at a significantly higher level. Leveraging our expertise accumulated over many years, we have established technology for mass-producing high-performance diaphragms by blending bio-cellulose fibers with other fibers under optimal conditions.
The magnetic circuit employing a repulsive magnetic field incorporates an ultra-powerful driver unit with a magnetic flux density of 1.5 tesla.
Featuring a neodymium magnet with a magnetic flux density of 1.5 tesla, it delivers an expansive dynamic range through a low-distortion, ultra-powerful high-performance magnetic circuit.
The housing opening incorporates a double-layered aluminum etched part.
The openings feature a unique design with double-layered aluminum etched parts that change their impression depending on light intensity and angle. Furthermore, through the opening ratio and repeated fine-tuning of each internal component, it reproduces a natural sound field that is comfortable and fatigue-free.
Includes high-purity OFC unbalanced cable
It comes with a 7N (99.99999%) grade high-purity OFC (Oxygen-Free Copper) unbalanced cable, which maximizes transmission capability by eliminating impurities to the utmost degree.
Ear pads featuring low-rebound cushioning to reduce sound leakage
We have specially designed ear pads that fit snugly around the back of the ear to minimize sound leakage. Featuring low-rebound cushions and premium synthetic leather, they provide a comfortable feel against the skin and a pleasant wearing experience even during extended use.
