What Cart. for a Infinity Black widow

By far the best cartridges were the Pritchard designed
Induced magnet and moving cartridges from the late 60s and
70s. Try the original (if you can find it) ADC XLM with
a high compliance or even better, the ADC 25 3-stylus
cartridge - the very highest compliance ever made (120X 10-16 cm/sec) and you can play your records at .5 grams on
the Ol' Widow. If you cannot find these two, the next best
was either the Sonus Blue or Sonus Gold Blue.

I know this is an old thread but would like to say that after breaking in the Shure cartridge I have come to like it very much.

Try an ADC or Sonus cartridge... Both of those are A+ with the Black Widow.