Rega Aria Mk1 Phonostage

Hidden to use in a demo on 07/08 BR

Here we have an award winning Aria Mk1 MM/MC phono stage from British specialist Rega Research. In good fully working condition, noting a couple of tiny blemishes on the fascia, our example comes in original factory packaging. We (HiFi Sound Limited) are Rega dealers, and are supplying this unit with, mains cable, manual and our standard 3 month warranty.
Rega Say….
The function of a phono pre amplifier is to match the output from a pick up cartridge to the input of a line level amplifier. It is required to amplify the very low signals produced by the cartridge and also to equalise the frequency curve in accordance with RIAA record cutting standard.
Moving coil (MC) and moving magnet (MM) cartridges require different types of phono pre amplifiers to achieve optimum performance. The Aria uses two separate circuits dedicated to both moving coil and moving magnet cartridges and avoids compromises.
The Aria is an “all analogue amplifier” with no digital control circuitry. The fully aluminium case screens the internal circuit from any stray RFI signals.
We have avoided including any superfluous gadgets as they obstruct the signal path and degrade the sound quality. The Aria incorporates remarkable and innovative design ideas.
The Aria has two entirely separate high performance phono stages. One fully adjustable dedicated moving coil and a moving magnet stage. Each stage has its own separate input sockets and input preamplifier circuitry. This enables Rega to design bespoke input circuitry for each cartridge without compromise. The MM/MC signal switching is performed at a high level and a low impedance using relays thus not causing any degradation of the signal.
The MC input uses parallel connected low noise FET’s (Field Effect Transistor) configured as a compound pair configuration. 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 the provision for selecting resistive input loading of 70 to 400Ω and capacitive loading of 1000 to 4200pF. The input sensitivity can be changed by 6dB, via the back panel. The MM input uses low noise bipolar input transistors also configured as a compound pair. There are two separate power supplies for each channel and further sub power supplies for each of the low noise input circuits. Nichicon FG electrolytic capacitors have been used in critical positions in the power supplies. ICEL and Wima polypropylene capacitors have been used in the signal path and equalization networks. Discrete circuitry is used throughout the signal path ensuring full control of the circuit design.
Specifications:
Maximum output level: 11 V RMS
Rated output level: 200 mV
Output resistance: 100 Ω
Minimum output resistance for a -3 dB point at 15 Hz: 1 K
AC Supply: 230 V & 115 V Nominal +/- 10%
Power Consumption: 10 Watts
MC Input:
Generator Source Resistance: 15 Ω
Loading Set to 100 Ω and 4200 pF
Input Sensitivity (0 dB high gain setting): 70 μV for 200 mV output
Input Sensitivity (-6 dB low gain setting) = 133 μV for 200 mV output
Resistive Input Loading: 70, 100, 150 & 400 Ω
Capacitive Input Loading: 1000, 2000, 3200 & 4200 pF
Maximum input level (0 dB high gain setting): 5.1 mV at 1 kHz
Maximum input level (-6 dB high gain setting): 10 mV at 1 kHz
Gain (0 dB high gain setting): 69.3 dB at 1 kHz
Gain (-6 dB low gain setting): 63.5 dB at 1 kHz
Frequency response (100 kΩ output load): 13 Hz (-3 dB) to 70 kHz (-0.2 dB)
RIAA accuracy (100 kΩ output load): better than +/-0.2 dB 70 Hz to 70 kHz
THD + Noise (-6 dB low gain setting): typically 0.035% at 1 V Bandwidth 100 Hz to 22 kHz
Noise (15 Ω terminator and -6 dB low gain setting): typically –71 dB V un-weighted 100 Hz to 22 kHz
Signal To Noise Ratio (un-weighted 100 Hz – 22 kHz bandwidth and 0 dB high gain setting): -67 dB
MM Input:
Generator Source Resistance: 40 Ω
Input Sensitivity: 1.7 mV for 200 mV output
Input Loading: 47 K in parallel with 100 pF
Maximum Input Level: 93 mV at 1 kHz
Gain: 41.4 dB at 1 kHz
Frequency Response (100 kΩ output load): 15 Hz (-3 dB) to 100 kHz (-0.2 dB)
RIAA accuracy (100 kΩ output load): better than +/-0.2 dB 100 Hz to 100 kHz
THD + Noise: typically 0.005% at 1 V Bandwidth 100 Hz to 22 kHz
Noise (150 Ω terminator on input): typically -86 dB V un-weighted 100 Hz to 22 kHz

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