Adding to the list of important components is Ortofon’s Wide Range Damping system (WRD). In this system, a small, heavy platinum disc is sandwiched between two rubber absorbers, both with different properties. This not only ensures that an exceptional tracking performance is maintained, but also ensures perfect damping through the entire frequency spectrum. Because of this, the distortion and resonance are virtually eliminated entirely.
The WRD system, which was originally introduced in the MC 30 in 1979 and was also used in the MC Windfeld and many of Ortofon’s other top-tier cartridges, is one significant reason why the MC A90 tracks a fantastic 100 µm at a vertical tracking force of 2.3 grams, while simultaneously achieving the most linear frequency response and the highest upper frequency limit ever.