Ortofon 2M 78 Moving Magnet Cartridge - 2M 78

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Literature

2M 78 Technical data

  • Output voltage at 1000 Hz, 5cm/sec. - 4 mV
  • Frequency range at - 3dB  -  20-20.000 Hz
  • Frequency response  -  20-20.000 Hz + 3 / - 1 dB
  • Tracking ability at 315Hz at recommended tracking force - 70 µm
  • Compliance, dynamic, lateral -  18 µm/mN
  • Stylus type  - Spherical
  • Stylus tip radius  -  R 65 µm
  • Tracking force range  -  1.6-2.0g (16-20 mN)
  • Tracking force, recommended  - 1.8 g (18 mN)
  • Internal impedance, DC resistance -  700 Ohm
  • Internal inductance  -  350 mH
  • Recommended load resistance  -  47 kOhm
  • Recommended load capacitance  -  150-300 pF
  • Tracking angle  -  20°
  • Cartridge colour, body/stylus  -  Black/Grey
  • Cartridge weight without screws  -  7.2 g
  • 2M PnP MkII cartridge with integrated headshell weight  -  20 g
  • 2M PnP MkII cartridge with integrated headshell length - 52 mm
  • Replacement stylus unit  -  2M 78 (interchangeable with 2M Mono)

Stylus lifetime: with proper care we find that up to 1000 hours is possible without degradation of performance. 

Features:

  • An improved engine, which provides a high level of sonic accuracy
  • Spherical diamond that is perfect for playback of 78 rpm shellac records, which require a larger stylus profile
  • 2M 78 uses a strapped output to deliver the same output signal from both sets of pole pins. This effectively eliminates the need for mono-specific equipment, making it possible to enjoy true mono reproduction on any stereo playback system.

The 2M Series provides excellent compatibility when used in an assortment of playback systems and with a wide variety of phono preamps.
 

Specifications
Output voltage at 1 kHz, 5 cm/sec. 4 mV
Frequency range at -3 dB 20–20,000 Hz
Tracking ability at 315 Hz at recommended tracking force 70 µm
Compliance, dynamic, lateral18 µm/mN
Stylus typeSpherical
Tracking force recommended* 1.8 g (18 mN)
Load resistance* 47 kOhm
Load capacitance* 150–300 pF