Listening #171: Bob's Devices Sky 40 transformer
But when the phono cartridge of choice is a moving-coil (MC) type, which generates even less voltage than its moving-magnet (MM) and moving-iron (MI) friends, even more gain is required. This presents the user with an additional choice: he or she can select from among the many standalone phono preamps that offer sufficient gain, or augment an existing phono or full-function preamp or integrated amplifier with a phono step-up transformer, which boosts gain passively, without using tubes or transistors.