Ortofon SPU Mono GM MkII for playback of early mono recordsThe SPU Mono GM MkII is a high output Moving Coil cartridge a with a spherical stylus profile, for the playback of early 25µm mono recordings. The SPU Mono GM MkII provides an authentic method of playing back these early vinyl recordings with remarkable level of sonic accuracy, and its high output negates the need for a moving coil transformer.We offer Special Repair Service for SPU Mono GM MkII»Technical data Output voltage at 1000 Hz, 5cm/sec.3 mVFrequency range at – 3dB20-20.000 HzFrequency response20-15.000 Hz + 2 / – 1 dBTracking ability at 315Hz at recommended tracking force *)>70 µmCompliance, dynamic, lateral12 µm/mNStylus typeSphericalStylus tip radiusR 25 µmTracking force range3.0-5.0 g (30-50 mN)Tracking force, recommended3.5 g (35 mN)Tracking angle20°Internal impedance, DC resistance100 OhmRecommended load impedance47 kOhmCartridge body materialGrinded woodCoilwire materialHigh Purity Copper (OFC)Cartridge colourBlackCartridge weight30 g