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Deco Audio Shop
Rega AOS MC Phono Stage
Rega AOS MC Phono Stage
Regular price
£1,500.00 GBP
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£1,500.00 GBP
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The AOS is a dedicated fully adjustable moving coil pre-amplifier using a circuit design based heavily on the award-winning AURA reference MC phono stage. Housed in a custom made half width case, Rega state that the AOS will deliver exceptional definition and greater realism to all of your recordings, bringing your favourite vinyl to life. It's designed to work with a wide range of moving coil cartridges it has plenty of gain for low output MC’s 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 the designers have avoided 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 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.
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 the designers have avoided 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 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. 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.
The input has the 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.
An automatic standby feature has also been added which puts the unit to sleep after a period of no signal. This can be deactivated via dip switches located on the rear panel.
SPECIFICATIONS:
Input Load 70, 100, 150, & 400Ω
Gain (0dB high gain setting) 69.3dB at 1kHz
Gain (-6dB low gain setting) 63.5dB at 1kHz
Capacitive Load 1000, 4300pF
RIAA Accuracy (100kΩ output load) Better than ±0.2dB 65Hz to 70kHz
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)
Power consumption in Standby 0.4W
Power Consumption 20W
Dimensions (WxHxD) 220 x 80 x 330 mm
Weight 2.9Kg
Gain (-6dB low gain setting) 63.5dB at 1kHz
Capacitive Load 1000, 4300pF
RIAA Accuracy (100kΩ output load) Better than ±0.2dB 65Hz to 70kHz
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)
Power consumption in Standby 0.4W
Power Consumption 20W
Dimensions (WxHxD) 220 x 80 x 330 mm
Weight 2.9Kg
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