Grado Gold 4 Moving Iron Phono Cartridge with 4-Piece OTL Cantilever and Replaceable Elliptical Stylus
The Grado Gold 4 represents the absolute pinnacle of performance within the legendary Brooklyn-built Prestige Series phono cartridges. Engineered for vinyl enthusiasts who demand an exceptionally warm, musical, and low-distortion presentation, the Gold 4 features the tightest component grading and tolerances in its class. Utilizing Grado’s patented moving iron flux-bridger generator design, this cartridge offers the explosive transient speed and micro-detail typically reserved for delicate moving coil cartridges, while safely outputting a robust 4.0mV signal that works flawlessly with standard moving magnet phono stages.
Hand-assembled by master builders, the Gold 4 introduces flagship trickle-down technology via an ultra-high purity 5N OCC copper wire coil structure and a precision machine-turned generator array. This ensures near-perfect channel balance, massive soundstage depth, and remarkable vocal realism. At the tracking end, a specially configured four-piece OTL (Optimized Transmission Line) cantilever is paired with a specific elliptical diamond stylus mounted on a resonance-absorbing brass bushing. This unique architectural stack dramatically reduces surface noise, rejects unwanted vinyl resonance, and extracts pure musical energy from the record groove.
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Features:
- Top-Tier Prestige Grading: Receives the strictest assembly tolerances and tightest testing parameters in the series to deliver the lowest distortion and widest stereo separation.
- Patented Flux-Bridger Generator: Moving iron architecture delivers an incredibly low effective moving mass for moving-coil level speed and tracking agility without needing specialized preamps.
- Four-Piece OTL Cantilever: Employs telescoped alloys bonded with resonance-absorbing materials to reject unwanted vibrations and keep internal motor noise out of the audio circuit.
- Ultra-Purity 5N OCC Coils: Wound with high-grade oxygen-free continuous cast copper to ensure flawless internal signal transmission, exceptional tonal balance, and zero phase smear.
- Brass Bushing Mount: Mounts a high-performance elliptical diamond stylus onto a solid brass bushing at the tip to guarantee consistent geometry and reliable tracking depth.
- Standard 4.0mV High Output: Connects directly into any integrated amplifier, vintage receiver, or standard moving magnet (MM) phono input without a step-up transformer.
- User-Replaceable Stylus Design: Offers simple, tool-free snap-in maintenance so you can replace a worn stylus or easily upgrade within the Prestige line at home.
- Precision Molded Housing: Housed inside a die-injection molded polymer body that dampens structural acoustic feedback and handles tracking stress with perfect physical stability.
Specifications:
- Generator & Stylus Architecture:
- Cartridge Type: Moving Iron (MI) / Flux-Bridger Principle
- Stylus Profile: Dual-Radius Bonded Elliptical Diamond
- Cantilever Assembly: 4-Piece Optimized Transmission Line (OTL) on Brass Bushing
- Coil Composition: Ultra-High Purity 5N OCC Copper Wire
- Body Engineering: Precision Die-Injection Molded Anti-Resonant Polymer
- Electrical & Audio Performance:
- Output Voltage: 4.0 mV @ 5 CMV (45 Degrees)
- Frequency Response Range: 10 Hz – 55,000 Hz
- Channel Separation: Average 25 dB (10 Hz – 30,000 Hz)
- DC Resistance: 660 Ohms
- Internal Inductance: 50 mH
- Installation & Setup Parameters:
- Recommended Tracking Force: 1.6 g – 1.9 g
- Dynamic Compliance: 20 µm/mN (High/Medium Match)
- Recommended Input Load: 10k Ohms – 47k Ohms (Standard MM Phono Input)
- Cartridge Weight: 6.0 grams
- Mounting Style: Standard 1/2" Screw Mount (Universal Headshells)
- Manufacturing Origin: Hand-Built in Brooklyn, NY, USA
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