Ortofon SPU Mono CG 65 Di MkII The Mono CG 65 Di MkII is an SPU-style Moving Coil cartridge with a spherical stylus profile, for the playback of early 65 µm mono and 78 rpm recordings.  The CG 65 Di MkII provides an authentic method of playing back these early recordings with a remarkable level of sonic accuracy, regardless of the materials used to manufacture these discs. This cartridge features a 1.5mV output, which makes it suitable for use with a variety of medium-gain moving coil transformers.  Technical data   Output voltage at 1000 Hz, 5cm/sec. 1.5 mV Frequency range at - 3dB 20-18.000 Hz Frequency response 20-15.000 Hz + 3 / - 1 dB Tracking ability at 315Hz at recommended tracking force *) >60 µm Compliance, dynamic, lateral   Stylus type Spherical Stylus tip radius R 65 µm Tracking force range 4.0-5.0 g (40-50 mN) Tracking force, recommended 4.5 g (45 mN) Tracking angle 20° Internal impedance, DC resistance 6 Ohm Recommended load impedance >100 Ohm Cartridge body material Grinded wood Coilwire material High Purity Copper (OFC) Cartridge colour Black Cartridge weight 33 g