Rega - AOS Moving Coil Phono Stage

The Rega AOS is a dedicated, no-compromise, fully adjustable moving coil phono stage with a circuit design based heavily on Rega's award-winning Aura reference MC phono stage.

Housed in a custom made Rega half width aluminium case, the AOS will deliver exceptional definition and greater realism to all of your recordings, bringing your favourite vinyl to life. Designed to work with a wide range of moving coil cartridges, it has plenty of gain for low output MCs and excellent load adjustability, making it the perfect partner for whichever moving coil you are using.

The AOS is a two stage "all analogue amplifier" with no digital control circuitry. The fully aluminium case screens the internal circuit from any stray RFI signals, and Rega's designers have avoided including any unnecessary components or circuits that may degrade the signal path. The AOS incorporates many innovative design ideas including a self-adjusting servo control which compensates for any variations in ambient or operating temperature.

The AOS utilises parallel connected, low noise FETs (Field Effect Transistors) configured as a compound pair. 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 MC input has provision for selecting resistive input loading of 70 Ω to 400 Ω and capacitive loading of 1000 pF to 4300 pF. The input sensitivity can be changed by 6 dB via the back panel, and an automatic standby feature puts the unit to sleep after a period of no signal (deactivatable via rear-panel dip switches).

Key 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
• Lifetime warranty against manufacturing defects

Technical Specifications

• Input Load: 70, 100, 150, & 400 Ω
• Capacitive Load: 1000, 4300 pF
• RIAA Accuracy (100 kΩ output load): Better than ±0.2 dB, 65 Hz to 70 kHz
• Frequency Response: 17.5 Hz (-3 dB) to 100 kHz (-0.2 dB)
• THD: 0.03%
• Input Sensitivity: 69.3 dB (Gain Setting I), 63.5 dB (Gain Setting II)
• Gain (0 dB high gain setting, recommended for Rega MC cartridges): 69.3 dB at 1 kHz
• Gain (-6 dB low gain setting): 63.5 dB at 1 kHz
• Power Consumption in Standby: 0.4 W
• Power Consumption: 20 W
• Dimensions (W x H x D): 220 x 80 x 330 mm
• Weight: 2.9 kg