Ortofon Hi-Fi SPU Classic GM MKII Moving Coil Cartridge
The SPU Classic GM MkII is a Moving Coil cartridge with an 18 µm spherical stylus profile.
The SPU Classic series embodies the essence of the original Moving Coils and are a perfect solution for the playback of both early and modern and contemporary stereo recordings.
The ST-7 transformer is a perfect match for the SPU Classic GM MkII cartridge.
Output voltage at 1000 Hz, 5cm/sec. - 0.2 mV
Channel balance at 1 kHz < 1 dB
Channel separation at 1 kHz > 20 dB
Channel separation at 15 kHz > 10 dB
Frequency response - 20-20.000 Hz + 3/- 3 dB
Tracking ability at 315Hz at recommended tracking force *) > 65 µm
Compliance, dynamic, lateral - 8 µm/mN
Stylus type - Nude Spherical
Stylus tip radius - R 18 µm
Tracking force range - 3.0-5.0 g (30-50 mN)
Tracking force, recommended - 4.0 g (40 mN)
Tracking angle - 20°
*) Typical value
Internal impedance, DC resistance - 2 ohm
Recommended load impedance > 10 ohm
Cartridge body material - Ground wood and resin composite
Coilwire material - High Purity Copper (OFC)
Cartridge colour - Shiny black
Cartridge weight - 30 g