Ergonomic Design
85mm Planar Magnet Driver
Professional Tuning
High-Fidelity Sound
Advanced 5-Axis CNC Machining of Aluminum Alloy
3.5mm Replaceable Cable

First Over-Ear Headphones
Tangzu's first open-back planar magnetic headphone, developed over many months of dedicated research. Leveraging our deep expertise in planar diaphragm technology and open-back acoustics, every detail of the headphones has been precisely tuned, achieving natural airflow, stable acoustic control, and a wide soundstage. Advanced processing technology and precision manufacturing give the headphones outstanding structural stability, while the ergonomically balanced design provides a comfortable listening experience for extended wear.

Planar Magnet Driver
Our planar diaphragm driver unit is crafted using a precisely matched magnetic array, an ultra-thin, high-stability diaphragm, and meticulously designed circuitry, achieving rapid transient response, low distortion, and effortless, natural detail resolution. Each component is optimized to achieve uniform force distribution and precise control, ultimately delivering exceptional dynamic performance, high resolution, and a naturally wide soundstage. Five-Axis Aluminum Alloy CNC Machining Every structural component is machined from aerospace-grade aluminum. This includes custom-designed hinge assemblies, specifically designed for precise rotation, even load distribution, and exceptional long-term durability. This high-precision machining process ensures superior structural stability and mechanical consistency, while providing a refined tactile experience comparable to reference-grade headphones.

Robust Balance Design Concept This piece is forged from the core spirit of the Bull Demon King, a perfect fusion of ultimate power and exquisite craftsmanship. Every surface, every angle, every seam exudes an understated sense of power—solid metal colliding with precise geometry, showcasing the true texture of the raw materials. Symmetry is not merely a design technique, but a tangible expression of authority. Every hinge, every contour, is crafted with uncompromising precision, achieving a delicate balance between industrial rigor and handcrafted artistry. The final product exudes an understated presence, enduring resilience, and a captivating blend of strength and elegance.

Comfortable and Durable Leather Earpads

Both the earpads and headband are wrapped in soft, high-grade leather, providing unparalleled wearing comfort, durable quality, and convenient replacement. Designed for extended wear and seamless, personalized customization, every stitch and contour is meticulously crafted to precisely fit the head's contours. The high-tenacity material ensures stable performance even under high-frequency use. Its user-friendly design allows for tool-free quick replacement, enabling users to fully customize the fit and tactile experience. Here, luxurious touch and top-notch craftsmanship are perfectly integrated, creating a product that combines a luxurious experience with practical functionality, achieving a harmonious unity of comfort, durability, and elegance.

Replaceable Cables

These headphones feature replaceable cables, offering exceptional flexibility and future compatibility. Users can easily switch between various high-quality cables, whether 4.4mm balanced, 2.5mm balanced, or standard 6.35mm, unlocking rich sound potential and creating a listening experience perfectly tailored to personal preferences.

Sound Design Philosophy

This planar magnetic headphone adheres to Tangzu Acoustics' product philosophy of "Original Sound as the Foundation," condensing the spirit of the Bull Demon King, and presenting a powerful yet precise, balanced yet stable sound quality. Every note is imbued with surging original power, possessing both delicate resolution and a stable sense of presence.

Standard Replaceable 3.5mm Headphone Cable

The "Bull Demon King" headphones come standard with a 2-meter-long high-purity oxygen-free copper cable, exquisitely crafted, and also equipped with a 6.3mm adapter. In addition, we also offer a custom-designed 4.4mm balanced upgrade cable specifically tailored for this headphone, for users to choose from. See below for more details.

Custom Upgrade Cable

The Iron Cudgel is the weapon used by the Mighty Bull Demon King in the Ming Dynasty novel *Journey to the West*. The Bull Demon King used this weapon, along with his seventy-two transformations and the Water-Splitting Golden-Eyed Beast, to engage in a fierce battle with Sun Wukong in the Flaming Mountain Battle. Therefore, Tangzu's first balanced upgrade cable designed for over-ear headphones is named "Mixed Iron Rod," primarily enhancing overall resolution and vocal performance. It also utilizes a 4.4 balanced configuration to improve the lateral soundstage.

Packaging List:
3.5mm Custom Replaceable Cable
One pair of headphones
6.3mm Adapter
Specifications: Bull Demon King — Single Planar Magnet Driver
Driver Configuration: 85mm Planar Magnet Driver
Sensitivity: 92dB/mW ± 3dB @ 1000Hz
Impedance: 25Ω ± 15% @ 1000Hz
Frequency Response Range: 10Hz-40,000Hz
Total Harmonic Distortion: ≤3% @ 1000Hz
Rated Input Power: 100mW
Maximum Input Power: 300mW
Cable Length: 2m