The MC1-H is a step-up transformer designed specifically for “high output” moving coil cartridges where the output voltage is significantly lower than a typical moving magnet cartridge (which is about 5mV). Cartidges in this category include the:
Benz Micro MC Silver
Any high output mc cartridge with an output voltage in the range 0.8mV to 1.8mV will benefit from an increased signal level and improved signal-to-noise ratio when used with the MC1-H.
Cartridges in the range 1.8mV to 2.5mV may also benefit from the MC1-H.