When they first cut disks, amplitude of signal = amplitude on disk. A
crystal or ceramic cartridge reproduced that with no equalisation. Whgen
moving coal and moving magnet came a long, voltage was proportional to
speed, so they need lots of bass boost - at 6dB per octave.For some
reason they then decided to put a bit less on the disk and a bit more in
the amp, and the infamous RIAA curve was borne.

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Renewable energy: Expensive solutions that don't work to a problem that
doesn't exist instituted by self legalising protection rackets that
don't protect, masquerading as public servants who don't serve the public.