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@robob I can't let this stand- sorry.
The RIAA curve is based on the 'constant velocity' characteristic of magnetic cartridges and also magnetic cutter heads. Magnetic cartridges are constant-velocity devices: the signal is proportional to the velocity of the stylus. High frequencies cause the stylus to move faster, so there's more signal level as frequency rises. The cutting head used to make the master is also a constant-velocity device, so a magnetic cartridge "matches" the characteristics of the cutting head. The RIAA pre-emphasis is applied when mastering to restrict excessive groove excursion (bass cut) and to reduce surface noise (treble boosted in record, rolled off during playback).
The EQ is not to overcome a shortcoming IOW. FWIW, the mastering process can produce undistorted grooves that no pickup has a prayer of playing; its designed to be impossible to overload. The limit and distortion sources are mostly due to playback, not record. I learned this the hard way by owning an LP mastering setup for about 30 years."
I mentioned that the curve is used to compensate for deficiencies in the playback of LPs. Thanks for the additional clarity. Problems exist both on the cartridge side and the characteristics of a vinyl record. My point is the cartridge does not involve it self in applying the inverse of the cutting curve. The phone stage does that.
Y'all be cool,
Robert