Rega Fono MC MK4 The Fono MC MK4 is a precision phono stage designed to unlock the full potential of low-output moving coil cartridges, featuring comprehensive gain and loading adjustments. Its updated chassis complements the Fono MM MK5 and Neo MK2, presenting a cohesive, modern aesthetic. Utilizing the Linear Systems LSK389 FET, the amplifier offers a low-noise, highly linear input stage with elevated input impedance to ensure the cartridge’s performance remains uncompromised. KEY FEATURES Dedicated moving coil phono stage Simple connectivity and operation Fully adjustable via DIP switches via rear panel MUSE operational amplifier used in RIAA equalization amplifier Two selectable gain settings Default factory settings matched for all Rega MC models Latest design custom casework   .