A Briefing on Ortofon's SPU Cartridges
Ortofon’s SPU cartridges continue the tradition of the first ever Moving Coil cartridges as originally engineered by Mr. Robert Gudmandsen and produced by Ortofon in the late 1950s. Praised for their refined linearity and full body, these cartridges have remained a favorite throughout the years, both for modern and vintage high-end applications. The latest incarnation of SPU cartridges feature a wood-based integrated headshell to further reduce resonance and provide an authentic and attractive aesthetic.

Details on the Ortofon SPU Classic GM E MKII
The SPU Classic GM MKII, known for its dynamic and powerful sound reproduction, is a Moving Coil (MC) cartridge with an elliptical 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 SPU Classic GM E MKII’s elliptical stylus profile provides more detailed sound reproduction and expansive imaging.

Ortofon SPU Classic GM E MKII Technical Data

Output voltage at 1000 Hz, 5cm/sec. 200 µV

Channel balance at 1 kHz < 1 dB

Channel separation at 1 kHz > 20 dB

Channel separation at 15 kHz > 10 dB

Frequency range at - 3dB 20-25.000 Hz

Frequency response FIM distortion at recommended 20-20.000 Hz + 3 / - 2 dB

Tracking ability at 315Hz at recommended tracking force *) 65 µm

Compliance, dynamic, lateral 8 µm/mN

Stylus type Nude elliptical

Stylus tip radius r/R 8/18 µm

Tracking force range 3,0-5,0 g (30-50 mN)

Tracking force, recommended 4,0 g (40 mN)

Tracking angle 20°

Internal impedance, DC resistance 6 Ohm

Recommended load impedance > 10 Ohm

Cartridge body material Grinded wood

Coilwire material High Purity Copper (OFC)

Cartridge colour Black

Cartridge weight 30 g


Ortofon SPU Brochure PDF