The Ortofon SPU Mono GM MkII is specifically designed for the playback of early 25µm mono recordings. A high output, moving coil model, the Mono GM MkII employs a spherical stylus profile,and its relatively high output removed the need for the use of a high-gain step-up transformer.
The SPU Mono GM MKII continues the Ortofon tradition and provides an authentic method of playing back early vinyl recordings with a remarkable level of sonic accuracy.
Output Voltage (at 1kHz, 5cm/sec): 3 mV
Frequency Range (at -3dB): 20Hz-20kHz
Frequency Response 20Hz-20kHz: +2/-1dB
Tracking Ability at 315Hz: Typically >70µm
Compliance, Dynamic, Lateral: 12 µm / mN
Stylus Type: Spherical
Stylus Tip Radius R: 25µm
Tracking Force Range: 3.0-5.0g (30-50mN)
Recommended Tracking Force: 3.5g (35mN)
Tracking Angle: 20º
Internal Impedance / DC Resistance: 100 ohms
Recommended Load Resistance: 47k
Cartridge Weight: 30g