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All Grado cartridges use a derivation of the moving iron principle which features patented optimized transmission line cantilever technology, pivoted fixed axial stylus-generator module, and Grado's flux-bridger generator system.
Grado Labs announces the release of their new DJ series of professional phono cartridge. Built and designed to meet the demanding needs of the professional DJ musician, these cartridges deliver performance never known before in the pro DJ market. The Grado specially engineered transmission line cantilever allows for the ideal transfer of music signal and for safe and effective stylus back-cueing. The DJ series can track from 2 to 5 grams, and delivers the warm musical Grado sound the audio industry has embraced and enjoyed for 50 years. The DJ series incorporates our newest Flux-Bridger generator systems for lower effective tip mass and lower electrical inductance. Each DJ series cartridge is hand assembled to Grado's high standards, which contributes to the unchallenged consistency of performance, and the Grado guarantee of reliability. The DJ series of cartridges are the most advanced phono pickups ever offered to the professional DJ market, without exception.
The Prestige model DJ100 uses a three-piece OTL cantilever technology, oxygen free wire in the coils and a specially designed, high polished, diamond mounted in a brass bushing.
Grado's Prestige Series of Phono Cartridges
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 50 kHz and beyond and tracking forces from 1-2 grams. Acclaimed by experts as virtually the finest pickups in the world at their price. Prestige models available in both 0.5" mount and P-mount. All styli in the Prestige series are user replaceable.
Hand-Built in USA with 100% Quality Control
Each individual cartridge manufactured by Grado is hand assembled and tested for frequency response, channel output, channel balance, phase linearity, inductance and resistance. This meticulous care in design and construction lavished on each Grado cartridge contributes to an unchallenged consistency of performance and guarantee of reliability.
Optimized Transmission Line (OTL) Stylus/Cantilever
Grado's OTL provides an ideal transfer of the signal from point to point, e.g., stylus to cantilever to magnet to coils, etc. This has been achieved by eliminating resonance at each of these key junctions. The transmission line cantilever consists of separate sections that are telescoped into each other. All sections are made of different alloys, some sections hollow, other sections solid. These sections are bonded together with materials that act as dampers, and are coated with a black proprietary material which controls and absorbs resonances that travel on the surface of the cantilever (known as skin effects). The OTL stylus/cantilever design will make your records sound quieter, improve the height, width, and depth of the soundstage, and offer more detail than previously obtainable. Cartridge Holography does exist...and that is what GradoÕs OTL technology is all about, more performance.
Pivoted Fixed Axial Cantilever Stylus-Generator
This design feature is basically quite simple. The "OTL" cantilever shaft is brought to a fixed axial pivot that supports the entire cantilever assembly. A miniature element attached to the end of the cantilever can move freely within the lines of flux of a stationary magnet and coil structure.
This system of support is mechanically more accurate (more linear) than conventional "teeter-totter" designs that utilize an iron armature to balance the mass of the cantilever. The teeter-totter design is supported in the center with a rubber donut mounting. The fixed axial design has a very low tip mass, which results in lower distortion, improved transient response, and longer record life. This proprietary design allows the implementation of the Flux-Bridger Generator System!
Flux-Bridger Generator System
The Flux-Bridger design uses four separate magnetic gaps that the miniature element of the cantilever bridges. The miniature element moves between opposing flux gaps creating an increase in flux in one gap while reducing it in the other. The four separate magnetic gaps create a highly efficient and perfectly balanced system. This design requires fewer coil turns than conventional designs.
Fewer coil turns allow Grado cartridges to have lower mass and lower electrical inductance, making them insensitive to tone arm cable capacitance. The four-gap design is perfectly balanced and eliminates magnetic residue which contributes to increasing distortion over longer time periods. Grado cartridges reduce distortions that cause listeners fatigue.