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Ortofon SPU Mono GM MKII

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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 Mono GM MkII

The SPU Mono GM MKII is a high output Moving Coil (MC) cartridge with 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.
  • Output voltage at 1000 Hz, 5cm/sec. 3 mV
  • Frequency range at - 3dB 20-20.000 Hz
  • Frequency response FIM distortion at recommended 20-15.000 Hz + 2 / - 1 dB
  • Tracking ability at 315Hz at recommended tracking force *) > 70 µm
  • Compliance, dynamic, lateral 12 µm/mN
  • Stylus type Spherical
  • Stylus tip radius R 25 µm
  • Tracking force range 3,0-5,0 g (30-50 mN)
  • Tracking force, recommended 3,5 g (35 mN)
  • Tracking angle 20°
  • Internal impedance, DC resistance 100 Ohm
  • Recommended load impedance 47 kOhm
  • Cartridge body material Grinded wood
  • Coilwire material High Purity Copper (OFC)
  • Cartridge colour Black
  • Cartridge weight 30 g
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