preamplificatore stereo m20Fully differential dual mono preamplifier built on the analog design of the M12 controller to develop a rich sound experience with smooth, fast and balanced audio . The M20 features completely separate signal paths for better sound isolation and purity . The circuit is powered by three linear power supplies , equipped with three separately buffered analog outputs , Stillpoints pins , ideal in combination with the M28 amplifier and the M21 dac.