Terrapin Audio MC Moving Coil Phono Cartridge Transformer 1:15 1:30 step up Cobalt Amorphous Core Price is for a Pair Can be wired as 1:7.5 1:15 or 1:30 – which is perfect for low output cartridges like Ortofon SPU series and others with output below 0.3mV, MC Moving coil Phono Cartridge transformer replacement or for DIY build, For matching a wide range of cartridge impedances: ~1-50ohm MuMetal Shield encapsulation + mounting clamp Feel free to contact me regarding compatibility with your application or with any tech questions, Toroid Cobalt Amorphous Core Extra low Hysteresis loss, excellent inductance per turn over wide frequency range and low DCR makes it best core material for low level signals with exceptional transient response, Frequency response: 10Hz-50kHz +0-0.5db with Minimal Phase Shift and THD Cartridge impedance: ~1-50ohm Dimensions: ~35mm diameter with 25mm height Other ratios and transformer types are available (including microphone preamp input output and Ribbon mic output, moving coil MC transformer, Power amp SE PP outputs etc.) Free airmail shipping with tracking Worldwide!