Ortofon OMP-30
Little is documented about the Ortofon OMP-30. Higher-numbered models, like the OM-40, used individually calibrated Van den Hul styli and cost more. The OMP-30 presumably sat in the middle of the range, likely with a finer elliptical or Fine Line stylus rather than the conical tips on the entry-level versions.
A 1986 HiFI-Stereo buyer’s guide (February 1986, p.116) listed the OM-40 alongside other Optimum Mass cartridges and noted the series’ “variable magnet shunt” design. A 1992 HiFI-Stereo buyer's guide (1992, p.86) also listed the OM-40, with an output of 5 mV at 5 cm/sec and a frequency response of 10-60,000 Hz. Nobody has pinned down what the “P” suffix means. It could be a professional variant, a different stylus profile, or a regional model.
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