Most stereo Moving Magnet (MM) and Moving Iron (MI) cartridges—modern as well as classic—work great with the M3 preamplifier. All modern stereo Audio Technica VM, Ortofon OM and 2M, Shure, Goldring G, E, 2X00 and 10XX series, Nagaoka MP and Sumiko Pearl/Oyster cartridges are fully compatible.
All stereo Moving Magnet (MM), Moving Iron (MI) and similar cartridges that have an inductance from 0.1 Henry to 2 Henry and a DC (direct current) resistance between 100 Ohm and 2 kOhm (2000 Ohm) are fully compatible with the M3 preamplifier. The absolute majority of MM and MI cartridges, modern as well as classic, fall within this spectrum.
The following cartridges are not compatible with M3 preamplifier:
Ceramic, strain gauge, capacitance cartridges, including all classic Micro Acoustics cartridges
Moving coil (MC) cartridges, including "high output"
Grado and cartridges that Grado made for other companies (for example, some Pro-Ject cartridges were manufactured by Grado)
Decca and London cartridges, both modern and classic
Soundsmith "low output" series of cartridges (but Soundsmith "high output" cartridges are fully compatible)
Classic Stanton LZS and Pickering XLZ series "low output" cartridges. All other stereo Stanton and Pickering cartridges are compatible.
Most mono cartridges