Hagerman Audio Labs Piccolo Zero

Keep it in the groove! Piccolo Zero is a transimpedance headamp designed to operate LOMC cartridges in current mode (zero input impedance). This mode is desirable for its improved tracking ability, resulting in lower distortion and well controlled sonic presentation. There are four levels of gain, selected by internal switches. Use with any MM phonostage (like an SUT). 

To determine if your cartridge is suitable for transimpedance operation, it's inductance (in uH) divided by it's resistance (in Ohms) should be less than five. This ratio determines resulting bandwidth.