i2Audio Phono One MM Pre-AmplifierThe Phono One from i2Audio is a high quality phono pre amplifier for MM systems. It requires an external 12V power supply (we have a universal 12V 2A power supply here we use for the Arduino) i2Audios PhonoOne is a small, yet excellent sounding phono preamplifier for MM pick ups. The design achieves a very low group delay distortion which results in a very natural replay of any kind of music. With its input impedance of 47k 100pF and a fixed gain of