What step up transformer do I need for a 0.25mV cartridge?

At 0.25 mV output, your moving coil cartridge produces a low signal that requires a high-gain step-up transformer to reach MM phono stage level. Ratios in the 1:16 to 1:20 range are typically best, depending on cartridge impedance and phono stage headroom. The MC1 moving coil SUT is designed for precisely this challenge, with Lundahl transformer options like the LL9226XL and LL1678XL available in high ratios to bring out the cartridge’s full potential. With extra-large core options to handle dynamics and our SUT Load Calculator to fine-tune the match, the MC1 is the perfect solution for 0.25 mV cartridges.