Product Description

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Ortofon SPU Mono CG 25 Di MkII Cartridge

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.

A little background of the SPU cartridge.

In the 1950’s and 1960’s phono cartridges were called “pick-ups,” so “SPU” stands for “stereo pick-up” .The original SPU was introduced in response to the demand for cartridges to reproduce the new stereo records. Based on Ortofon’s already 10 year old technology and experience in mono cartridges, the SPU immediately set the standard for professional and audiophile applications.

Back in 1the late 50’s, the Ortofon SPU had a unique sound compared to other cartridges and was way ahead of its competition. Today the SPU still sounds like no other, it has its own ;and it enjoys a remarkable following – in particular among audiophiles whose systems are comprised of vintage valve equipment and horn or reflex speakers.

But with no other cartridge over the course of half a century, have we ever had to take so much care in respecting this original sound while improving technical data, as with the SPU model. As a result  and in order to show considerations for this goal, you will after 60 years still find the basic visuals, the original design, as well as the original elements in the construction of the magnetic circuit kept fully intact.

Obviously the product has changed throughout its evolution. New developments have been made in housing materials, diamonds and magnetic system which have been employed to improve the SPU’s performance but staying faithful to the original concept. Clearly, in the last 60 years certain components have been changed—as the suppliers no longer make them so replacements must be found.

Specifications