The 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) i2Audio’s 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 47kΩ/100pF and a fixed gain of 40dB, it suits a wide variety of MM systems. Highly linear SMD foil capacitors and high performance integrated operational amplifiers guarantee low noise and distortion. Only a 12V DC power supply with minimum 100mA current capability is required. The onboard power management generates a symmetrical, low noise supply with ±8.5V for the amplifier stages which is key for a well-sounding preamplifier. Specifications * Input impedance 47kΩ, 100pF * THD < 0,005% @ 1kHz * S/N > 78dB (a-weighted) * Gain 40dB @ 1kHz * Output voltage 500mV @ 5mV input, 1kHz * RIAA deviation <0.5dB, 20Hz…20kHz * Size 92 x 45mm2, height 14mm * Input and output connections via gold-plated RCA connectors * Additional solder pads for input, output and supply * Single 12V supply, 5mm barrel jack * Typical supply current ~50mA https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2023-03-07 https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2023-12-27 https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2024-09-19 https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2024-11-29 https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2024-11-30 https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2025-11-28 https://elecena.pl/product/22720618/i2audio-phono-one-mm-pre-amplifier 2025-11-29