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The finest diamond ever created

Another precursor for linear sound reproduction, expansive frequency range and remarkable tracking performance is the diamond which graces the A90’s boron cantilever – the unique Ortofon Replicant 100.

This ultra-fine and now extra polished diamond was first introduced in the famous MC-3000 MkII and MC-5000 cartridges, and has also been used on the revered MC Windfeld. The Replicant 100 is incredibly thin and light, yet has an extraordinarily large contact surface despite a minimal radius of rounding. When correctly aligned, the Replicant 100 will track even the most demanding groove modulations and will read musical information from the groove with a level of accuracy that is unparalleled by any other needle in existence.

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Extremely high end materials benefit new coil technology

When using expensive Aucurum coils of gold-plated, the 6NX oxygen-free copper allows for zero-loss transmission of the diamonds movements via its boron cantilever. This combination, which has also been used in the by now legendary MC Windfeld, combines a low moving mass with an extremely high degree of rigidity.
Of course, an especially designed armature had to be created to achieve extreme precision in each coil turn in many layers. This enables the A90 to achieve a higher degree of channel separation, while simultaneously offering a lower distortion and a better channel balance.
A low output impedance of 4 ohm and a medium output voltage of 0.3 mV makes the Ortofon MC A90 a perfect partner for most step-up transformers, e.g. Ortofon ST-80 SE, as well as active MC pre-amps.
With optimal weight and compliance to suit the vast majority of modern medium-mass tonearms, the A90 is easily compatible with a seemingly endless array of modern contemporary high end turntable equipment.