Sir microlith . . . . . .
In the time progression of electronically amplified phonographs / turntables.
There were the first vacuum tube models which rapidly had their cartridges evolve to crystal cartridges which were designed to have a very hi voltage output, specifically so that they could make a cheaper amplifier, only involving 2 tubes and a rectifier, and the use of a very high 3.5 vac output cartridge to feed it.
Eventually they even came up with a single tube, that had a rectifier section and a power amplifier tetrode within the same octal based tube . . . . the real kicker . . . then being its having a 117vac filament on the tube.
Unfortunately those crystal cartridges had a very short life in warm environs, with output plummeting with time / high humidity presence .
Ergo . . . . declining volume from the units.
The transition to heat tolerable ceramic elements led to long life but with a 1vac output then being the norm.
The hi fi purists had their magnetic / variable reluctance cartridges that had good frequency response and lower tracking weight possible.
BUT those units put out down in the sub 5
mV AC output levels. Thereby a preamp(s) were needed to bring the channel(s) output(s) (we be STEEEEE-ROWWWW . . . now ) on up to the ceramic type units output levels.
Now gaze upon the spec for the SONY unit which you now have, and you will be seeing . . . about the 5th line down . . .the 2.5
mV phono input level of a mag cartridge without use of an outboard preamp.
https://www.hifiengine.com/manual_library/sony/ta-ax3.shtml
Thassssssit . . . . .
73's de Edd
.....