Ortofon SPU Synergy GM The SPU Synergy GM modernizes the classic SPU design with a number of optimizations designed for optimum compatibility and sonic purity. The SPU Synergy features a wood-based housing and has a revised generator system which allows for a maximum output of 0.5 mV, relaxing the requirement for high gain transformer or active preamplification systems. While still making use of a highly polished Nude Elliptical stylus, the stylus tip mass has been reduced significantly, resulting in reduced VTF and higher tracking ability. Technical data   Output voltage at 1000 Hz, 5cm/sec. 0.5 mV Channel balance at 1 kHz < 1.5 dB Channel separation at 1 kHz >23 dB Channel separation at 15 kHz >15 dB Frequency range at - 3dB 20-30.000 Hz Frequency response 20-20.000 Hz ± 2 dB Tracking ability at 315Hz at recommended tracking force *)  70 µm Compliance, dynamic, lateral 8 µm/mN Stylus type Nude elliptical Stylus tip radius r/R 8/18 µm Tracking force range 2.5-3.5 g (25-35 mN) Tracking force, recommended 3.0 g (30 mN) Tracking angle 20° Internal impedance, DC resistance 2 Ohm Recommended load impedance 10 - 50 Ohm Cartridge body material Grinded wood Coilwire material High Purity Copper (OFC) Cartridge colour Shiny Black Cartridge weight 30 g