Rega

Rega AOS Moving Coil Phono Stage

  • front side of rega aos mc moving coil phono preamp
  • back side of rega aos mc moving coil phono preamp

AOS

$2,999.00
$2,999.00

Free Shipping

  • In Stock

(For store pickups, please call for availability.)

Product Overview

Derived from Rega's award-winning Aura reference phono stage, the AOS is a fully adjustable, no-compromise moving coil preamplifier built for serious vinyl listening. Its all-analogue, two-stage circuit contains zero digital control circuitry, and the precision aluminium case shields everything from stray RFI interference — leaving only a pure, uncoloured path between your cartridge and your music.

Designed to partner with a wide range of MC cartridges, the AOS offers ample gain for low-output moving coils alongside extensive load adjustability — resistive loading from 70 Ω to 400 Ω and capacitive loading from 1000 pF to 4300 pF. A self-adjusting servo control compensates for temperature variations, while input sensitivity can be shifted by 6 dB via the rear panel, making the AOS a truly versatile foundation for any high-performance turntable setup.

Features

  • Dedicated moving coil phono stage
  • Fully adjustable for loading
  • Factory pre-set for use with all Rega MC cartridges
  • Circuit design based on the Reference Aura MC
  • Custom aluminium design half width case
  • Automatic standby function

First Stage

The first stage is a symmetrical, complementary class A amplifier, using Linear Systems ultra-low noise FET (Field Effect Transistor) transistors. The use of FET transistors ensures there is no bias current flowing in the cartridge coil so as not to upset the delicate magnetic geometry of the cartridge. The input circuit configuration also alleviates the use of any coupling components between the cartridge output and the input stage FET transistors, which would degrade the sound. The complementary ultra-low noise FET transistors are carefully graded and matched for optimum performance.

 This stage drives the passive high-frequency part of the RIAA equalisation stage. The complementary ultra-low noise FET transistors are carefully graded and matched for optimum performance. This stage drives the passive high-frequency part of the RIAA equalisation stage.

Second Stage

The second stage is a symmetrical, class A, differential amplifier with a common base driver stage; this is also used as the active amplifier in the low-frequency part of the RIAA equalisation stage.

Specifications

Input Load
70 Ω, 100 Ω, 150 Ω, 400 Ω

Capacitive Load
1000 pF, 4300 pF

RIAA Accuracy
Better than ±0.2 dB (65 Hz – 70 kHz)

Frequency Response
17.5 Hz (−3 dB) to 100 kHz (−0.2 dB)

THD
0.03%

Input Sensitivity
69.3 dB (Gain I) / 63.5 dB (Gain II)

Power Consumption
20 W (0.4 W standby)

Dimensions (W × H × D)
220 × 80 × 330 mm

Weight

2.9 kg

Load Settings for Adjustable MC Stages

Gain (0dB high gain setting) Recommended for Rega MC cartridges
69.3dB at 1kHz

Gain (-6dB low gain setting)
63.5dB at 1kHz

Frequently Asked Questions

What is the Rega AOS and what does it do?

The Rega AOS is a dedicated moving coil (MC) phono preamplifier. It amplifies the low-level signal from an MC cartridge to line level so it can be connected to an amplifier or receiver, while applying the RIAA equalization curve required for accurate vinyl playback.

What's the difference between the Rega AOS and the Rega Aura?

The AOS shares its core circuit design with the reference-level Aura MC phono stage but is housed in a more compact half-width aluminium case at a lower price point. Both are fully analogue with no digital control circuitry — the AOS brings Aura-derived performance into a more accessible package.

Will the Rega AOS work with my MC cartridge?

The AOS is compatible with a wide range of moving coil cartridges. It offers four resistive loading options (70, 100, 150, and 400 Ω) and two capacitive loading options (1000 and 4300 pF), making it adaptable to most MC cartridges on the market. It comes factory pre-set for use with all Rega MC cartridges including the Ania, Ania Pro, Apheta 3, and Aphelion 2.

Does the Rega AOS work with low-output MC cartridges?

Yes. The AOS provides up to 69.3 dB of gain (Gain Setting I), making it well suited to low-output moving coil cartridges that typically output between 0.2–0.5 mV.

How do I adjust the loading on the Rega AOS?

Loading is adjusted via dip switches on the rear panel, allowing you to select your preferred resistive and capacitive input load without opening the unit. Input sensitivity can also be reduced by 6 dB using the same panel.

Does the Rega AOS have a built-in phono stage or does it need one?

What is the standby feature on the Rega AOS?

The AOS includes an automatic standby function that puts the unit into a low-power sleep mode (0.4W) after a period of no signal. This can be disabled via rear-panel dip switches if you prefer the unit to remain active at all times.

Is the Rega AOS fully analogue?