
NAGAOKA · JT
JT80BK
Precision-engineered moving magnet performance featuring a high-rigidity boron cantilever.
Developed to celebrate Nagaoka’s eightieth anniversary, the JT-80BK stands as a statement of intent for the modern moving magnet era. While the brand remains synonymous with its classic moving permalloy designs, this cartridge represents a refined departure, utilising a meticulously engineered MM generator to achieve new levels of transparency and dynamic response.
Positioned at the apex of the JT line, the Black model is distinguished by its use of an ultra-lightweight and exceptionally rigid boron cantilever. This choice of material allows the stylus to track complex groove modulations with minimal inertia, effectively reducing distortion and preserving the integrity of the original recording.
Sonically, the JT-80BK offers an open and expansive presentation that belies its compact dimensions. It is celebrated for a sound that is both natural and authoritative, featuring a firm, well-defined bass, a full-bodied midrange, and a high-frequency response that remains delicate and free from artificial emphasis. It is a highly capable choice for the discerning listener seeking a sophisticated, high-fidelity experience.
Key Features
01
Boron Cantilever
Features an extremely rigid, low-mass boron cantilever that ensures precise stylus motion and exceptional high-frequency tracking.
02
Nude Elliptical Stylus
The high-precision nude elliptical diamond tip is ground for superior groove contact, extracting nuanced detail with minimal wear.
03
Integrated Mounting System
The cartridge body features internal threaded inserts, eliminating the need for nuts and reducing unwanted mechanical resonance.
Chapter 01
The Engineering Approach
Nagaoka’s design brief for the JT-80BK focused on structural simplicity to mitigate vibration. The block-like upper housing is crafted from carbon-fibre reinforced resin, providing a rigid platform that matches tonearm aesthetics while protecting the internal samarium-cobalt magnetic generator from electromagnetic interference.
Chapter 02
Listening Notes
In practice, the JT-80BK is noted for its ability to produce a stable and etched soundstage. By reducing the moving mass, the cartridge achieves an agility usually reserved for more expensive moving coil designs, rendering transients with speed and maintaining poise during complex musical passages.
Specifications
TypeMoving Magnet (MM)
Frequency response20 Hz – 20,000 Hz
Sensitivity3.0 mV (5 cm/sec)
Impedance47 kΩ
Power handling100 pF
Weight6.7 g
Channel separation 25dB(1kHz)
Channel balance1.0dB or less
Cantileverboron
Needle tip0.4x0.7mil ellipse / diamond
Stylus pressure1.3g-1.8g
Dynamic Compliance7.3×10⁻⁶cm/dyne
