Ortofon Spu Mono Cg 25 Di Mkii

The SPU Mono CG 25 Di MkII is for the playback of early 25 µm mono recordings. The Mono CG 25 Di MkII is an SPU-style Moving Coil cartridge with a spherical stylus profile, for the playback of early 25 µm mono recordings. The CG 25 Di MkII provides an authentic method of playing back these early vinyl recordings with a remarkable level of sonic accuracy. This cartridge features a 1.5mV output, which makes it suitable for use with a variety of medium-gain moving coil transformers. Ortofon ST-M25 moving coil transformer is designed exclusively for the SPU Mono CG 25 Di MkII.

Technical data

Output voltage at 1000 Hz, 5cm/sec. - 1.5 mV
Frequency response - 20-15.000 Hz + 3/- 1 dB
Tracking ability at 315Hz at recommended tracking force *)  > 60 µm
Compliance, dynamic, lateral - 7 µm/mN
Stylus type - Spherical
Stylus tip radius - R 25 µm
Tracking force range - 3.0-4.0 g (30-40 mN)
Tracking force, recommended - 3.5 g (35 mN)
Tracking angle - 20°
Internal impedance, DC resistance - 6 ohm
Recommended load impedance  > 100 ohm
*) Typical value

Cartridge body material - Grinded wood and resin composite
Coilwire material - High Purity Copper (OFC)
Cartridge colour - Shiny black
Cartridge weight - 33 g