Cartridges from the Prestige series - model Gold1 have had their coil design reconfigured, and the effective moving mass of their generating system has been reduced by 17%. The Gold1 models use a four piece OTL cantilever technology, ultra-high purity long crystal (UHPLC) oxygen free copper wire in the coils and specially designed elliptical diamond mounted in a brass bushing. The Prestige Series by Grado is designed for high output and excellent stability under severe use. Prestige models available in both 1/2" mount and P-mount. All styli in the Prestige series are user replaceable. The Gold1 model is selected from the Silver1 production run and meets higher test specifications. Approximately 5% of the production run meet these standards and become Gold1 models. Specifications: Frequency Response: 10 - 60 000 Hz, Principal: MI, Channel Separation at 1KHz: 35 dB, Input Load: 47 kΩ, Output at 1KHz 5CM/sec.: 5mV, Recommended Tracking Force: 1.5 g, Stylus Type: E, Inductance: 45mH, Resistance: 475 Ω, Compliance CUs: 20 cm/dyne, Stylus Replacement: U, Mounting: S/P, Weight: 5.5 g.