I recently bought a phono stage with variable impedance-loading options, and found the instructions to be in agreement with my previously experiment-based findings: that is...
"Loading should be set for about 2 to 3 times the rated impedance of the cartridge". I feel that this is basically correct because during my experimenting, I didn't even bother to initially check my cartridge's impedance rating, I just started plugging away with different values & ended up with 110 ohm load on a 30 ohm cartridge (OK that's close) which sounded good to my uneducated ear. Nice to know that at least sometimes, a subjective result can even approximate the objective ideal.
"Loading should be set for about 2 to 3 times the rated impedance of the cartridge". I feel that this is basically correct because during my experimenting, I didn't even bother to initially check my cartridge's impedance rating, I just started plugging away with different values & ended up with 110 ohm load on a 30 ohm cartridge (OK that's close) which sounded good to my uneducated ear. Nice to know that at least sometimes, a subjective result can even approximate the objective ideal.