Koetsu Urushi Black
Stereo MC Phono Cartridge
Urushi is the sap of the Urushi or lacquer tree that is native to Japan, China, and Korea. The sap of this tree contains a resin that polymerizes and becomes a very hard, durable, plastic-like substance when it is exposed to moisture and air. The Japanese art of Urushi is a tradition dating back thousands of years. This natural lacquer is applied to the cartridge body and once the lacquer cures, it hardens around the natural rosewood body, changing its resonant frequency.
The Urushi Black is an 9g stereo moving coil cartridge with a natural Rosewood body, silver plated copper coil wiring, a Samarium Cobalt magnet and Boron cantilever. All Koetsu Urushi models use silver cladded ultra-high purity copper coils. This process involves a silver sheath being slowly drawn over the copper. Many owners say that the Urushi body Koetsus have an even more exciting sonic signature compared to the standard Rosewood models – greater dynamic contrasts and a greater sense of energy.
|Body||Natural Rosewood with Urushi clear lacquer|
|Coil Wiring||Silver plated high purity copper|
|Output Voltage||0.4 mV|
|Frequency Range||20Hz to 100kHz|
|Channel Separation||25db / 1kHz|
|Inner Impedance||5 Ohm|
|Channel Balance||0.5db / 1kHz|
|Recommended Impedance||30 Ohm|
|Recommended Tracking Force||1.8 – 2.0g|
|Compliance||5 X 10-6cm / dyne at 100Hz|
|Recommended Load||80-1,000 ohms|