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Grado Black Prestige Series Phono Cartridges - Standard Mount
The difference between Reference and Prestige series, basically speaking, are stylus mass, tip mass, diamond shapes and size, different coils, different wires and compliance. The cost difference between the Reference and Prestige series are the closer tolerances, skilled technicians vs assembly line production, much higher parts cost and different design in the Reference series. The Prestige series of cartridges are designed for high output and excellent stability under severe use. A considerable tip mass reduction results in a frequency response to 55 kHz and beyond and tracking forces from 1-2 grams.
The Black and Green models use a three piece OTL cantilever technology, standard oxygen free wire in the coils and Grado's specially designed elliptical diamond mounted in a brass bushing. The Green model is selected from the Black production run and meet higher test specifications. Approximately 15% of the production run will meet these standards and become Green models.
Black & Green Technical Specification:
Output at 1KHz 5CM/sec. 5mV
Cartridge Type: Moving Iron
Stylus Type: Specially designed elliptical diamond
Wire: Ultra-high purity long crystal copper
Frequency Response: 20~50,000 Hz
Recommended Tracking Force: 1-2g
Recommended Load: 47 Kohm
Channel Separation at 1KHz 30
Inductance 45mH
Resistance 475
Compliance CUs 20
Stylus Replacement U=user U
Mounting S/P
Weight 5.5 Body: ABS plastic
Grado Cartridges Superior Design & Precision Fabrication
All Grado cartridges now use a derivation of the moving iron principle which feature patented OPTIMIZED TRANSMISSION LINE cantilever technology, PIVOTED FIXED AXIAL STYLUS-GENERATOR MODULE, and Grado's FLUX-BRIDGER GENERATOR SYSTEM.
Grado Reference & Prestige Cartridge Literature PDF
Grado Replacement Stylus History
The Legacy Continues... & Product Warranty Coverage
Grado, one of the oldest family owned companies in the Audio Industry, has for almost half a century been the leaders in design engineering for the high-end audio and recording industries.
GRADO, ONE OF THE OLDEST FAMILY OWNED COMPANIES IN THE AUDIO INDUSTRY
In 2003 Grado will celebrate 50 years of manufacturing products that offer top value to the consumer. We look forward to the next 50 years
of keeping the tradition alive.
Forbes Magazine Article UP & COMERS Grado Labs
After working for his uncle since the age of 12, John Grado finally took over the business five years ago.
Gramaphone Review Grado Black
Using a wide selection of favorite and technically demanding LPs, I rated this cartridge highly on all the important subjective sound quality criteria. With the stable tracking already mentioned, there was also a lack of any tendency to emphasize record surface noise. Heavy musical climaxes were handled well and quiet passages remained clear and interference-free. Extreme treble can often be an achilles heel for pick-up cartridges, but was enough smooth extention to provide natural string tone and sharp percussive effects.
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