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.