Shelter 501 mk2 v mk3

If output is different and internal resistance is the same, that implies there might be a difference in magnets used or the core construction Then there’s cantilever material and stylus shape; are those conserved between the two? A few years ago I asked myself the same question, but I wanted a mono cartridge and the model 3 did not seem to be available in mono, so my dilemma was solved for me, and I bought a 2 mono version.

Shelter cartridges are rarely discussed here for some reason.

Is the output different? Specs (sourced online) seem to be same on Mk 2 and Mk 3 - 0.4mV @ 12 ohms. This is a typical ratio for Shelter; their top "ultimate line" cartridges are 0.5mV @ 15 ohms which actually indicates a bit more coil is used (the reverse of most cartridge lines as you go up). Shelter also goes "against the grain" by reverting to aluminum cantilevers in their top line. Plus there’s the fact they stick with a plain elliptical on all but their top Harmony cartridge. No micro-ridges in sight.

Very interesting company that definitely doesn’t get much discussion these days. I fear they might be winding down, as the 7000, 9000 and Accord models suddenly disappeared from their website a few years ago, with no replacements. The Accord was only just introduced in 2014. And I actually prefer it to their top Harmony model - sad it was discontinued. It never got any press.

Shelter has a significant presence in Tokyo audio salons, FWIW. Maybe they lack an importer or the importer lacks enthusiasm.