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ARIA
TECHNOLOGY
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 pre-amplifier 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 400 Ω and
capacitive loading of 1000 to 4200 pF. The input
sensitivity can be changed by 6 dB, 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 equalisation networks. Discrete
circuitry is used throughout the signal path
ensuring full control of the circuit design.
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INSTALLATION
The Aria will work well on most surfaces,
provided there is sufficient air around it to
prevent overheating. To avoid any possible
magnetic interference and increased hum levels,
position the Aria as far away from the turntable
as the tonearm lead will allow; this ensures all
delicate electronics are kept away from other
transformers and motors etc. Try not to stack
other hi-fi components directly on top of each
other. Given the nature of sensitive high gain
phono amplifiers, the Aria may need placing
away from high power amplifiers that use large
transformers. If in the rare event that low level
noise should become overly intrusive, try using
the lower gain setting, and move the unit away
from possible noise sources as described.
The minimal heat produced by the Aria is
dissipated by the case, particularly the left
hand side. Try to ensure that the case has an
uninterrupted air passage around it. The Aria
circuit has been carefully designed to work
with a minimal "warm up" period of just a few
minutes as the sensitive input circuits stabilise
and reach their optimal operating conditions.
The MC input circuit uses a self-adjusting
servo control to keep the MC input circuit at its
optimum operating point, compensating for any
variations in ambient and operating temperature.
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