When I first experimented with cartridge loads last year I was convinced that 22-25 ohms was best in my setup (901 >> BentAudio Mu >> c-j MM phono). I was wrong.
It turns out I was compensating for other setup errors. My arm was too high. That emphasizes HF's of course, so I was unknowingly loading the cartridge down to compensate.
Since January or February we've been setting VTA (SRA to be precise) for every record we play. There's only one ideal SRA for any given record, so it's essential to dial that in before trying to fine-tune your cartridge loading.
The following protocol seems sensible:
1. Start with a load value used by others with setups similar to yours;
2. Optimize SRA and VTF for several familiar records of complex music, the guidelines on Lloyd Walker's website are excellent;
3. Now fine tune your loading using the same records.
This seems like the logical order for making these mutually dependent adjustments. Comments?