Jhardy, the term "compliance" relates to the flexibility of the suspension of the particular cartridge. Generally, a number of 12cu or under is considered low compliance. Low compliance means a stiff suspension, and often accompanies a heavier cartridge. Over 12 and under about 25 is medium. And over 25 is high compliance. Actual numerical values of these definitions may vary by some opinions, but these are approximately the values.
Many observe the proper guidelines for arm/cart resonance matching, which would give a combined mass/resonance in the 10Hz-12Hz area. For example, you don't put a lightweight super-high compliance cart on a high mass tonearm. You don't put a heavy super-low compliance cart on a low mass tonearm.
The Shelter cartridges, both the 501 and 901 have a compliance rating of 9cu. This is low compliance. The Benz Glider has a rating of 15cu. That's medium. The ZYX R-100 Fuji also has a rating of 15cu. (Cu is compliance units). The Grado Sonata has a rating of 20cu. Most cartridge compliance ratings are listed on their spec charts.
The Shelters like an arm around 12g effective mass.
Many observe the proper guidelines for arm/cart resonance matching, which would give a combined mass/resonance in the 10Hz-12Hz area. For example, you don't put a lightweight super-high compliance cart on a high mass tonearm. You don't put a heavy super-low compliance cart on a low mass tonearm.
The Shelter cartridges, both the 501 and 901 have a compliance rating of 9cu. This is low compliance. The Benz Glider has a rating of 15cu. That's medium. The ZYX R-100 Fuji also has a rating of 15cu. (Cu is compliance units). The Grado Sonata has a rating of 20cu. Most cartridge compliance ratings are listed on their spec charts.
The Shelters like an arm around 12g effective mass.