Grado Green4 Prestige Series · Moving Iron Phono Cartridge Part of the Grado Prestige Series, the Green4 delivers the core performance and musical character that define Grado cartridges. Built on decades of cartridge design, it provides a stable and engaging presentation across a wide range of systems — balanced, warm, and consistently musical. Moving Iron Design Built on Joseph Grado's patented flux-bridger principle — extremely low moving mass, fixed coil, and long-term signal consistency without the fragility of moving coil designs. Bonded Elliptical Diamond Elliptical profile on an aluminum cantilever for effective groove contact, reliable tracking, and a stable, balanced presentation across a wide range of recordings. 5N OCC Copper & Cryo Treatment Ultra-high purity 5N OCC copper internal signal path with cryogenic treatment and internal damping to reduce resonance and preserve signal integrity. Technical Specifications Output 4 mV @ 5 CMV (45°) Frequency Response 10 – 55,000 Hz Channel Separation Avg. 25 dB (10–30,000 Hz) Stylus Diamond – Elliptical Input Load 10k – 47k ohms Inductance 50 mH DC Resistance 660 ohms Cartridge Weight 6 grams Tracking Force 1.6 – 1.9 grams Compliance 20 µm/mN Mounting Compatibility Available in P-Mount and ½" Standard Screw Mount configurations for broad tonearm compatibility.
