Rega AOS MC Phono Stage

The Rega AOS is a two-stage, fully analogue moving-coil phono preamplifier whose circuit is derived from the reference Aura MC. Parallel low-noise FETs form the input stage, with symmetrical Class A circuitry, passive high-frequency RIAA equalization and an active low-frequency equalization stage.

Rear-panel settings select 70–400 Ω resistive loading, 1000 or 4300 pF capacitance and two gain levels. The aluminium half-width case provides RFI screening, while automatic standby can be disabled when continuous operation is preferred.