Ortofon SPU Mono CG 25 Di MkII Cartridge

£645.00

Ortofon’s true mono SPU Mono CG 25 Di MkII cartridge – for anyone wishing to hear what mono recordings really sound like, this is the next best thing to the Miyajima Zero Mono cartridges, at somewhat lower cost.    UK sales only, with free shipping.

Only 2 left in stock (can be backordered)

SKU: ORT-SPU-MONOCG25 Categories: ,

Description

Ortofon SPU Mono CG 25 Di MkII True Mono Cartridge

Ortofon’s SPU cartridges have long been cherished for their musical prowess, remaining resolutely old-fashioned in terms of weight, low compliance and heavy tracking force.  Have a read about the 60 year history of the SPU on Ortofon’s website here.   While there are SPU variants that can be used in tonearms having fixed headshells, most SPU models come with integrated headshells, now fashioned from ‘ground wood and resin’.  So, to use an SPU, you pretty much have to use a tonearm with a removable ‘SME’ type headshell connector, but fortunately most of the tonearms that we like and sell fall into that category.  Furthermore, the new Jelco tonearms have revised geometry which means an SPU will be aligned correctly to Ortofon’s recommended geometry (Löfgren B, we think).

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 most moving coil preamps and 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
Cartridge body material – Ground wood and resin composite
Coilwire material – High Purity Copper (OFC)
Cartridge colour – Shiny black
Cartridge weight – 37 g

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