4
Key
Sigsum
Features:
•
1,100 VA Toroidal transformer—132,000uF Capacitance Reservoir
The ‘heart’ of any amplifier, the power supply must provide for any energy demands made by the amplifier. Working
together these two key components maintain a massive energy reservoir that allows the amplifier to react to the complex
dynamic power demands created by the music. The size of both these devices ensure that the rest of the amplifier will
never place demands that cannot be met by the supply
•
50mm, High Quality Volume Potentiometer
Illustrating that not all volume controls are born equal! This massive brass
-
cased device offers a level of transparency
unequalled. It’s reassuringly weighty but smooth action indicative of the highest levels of build quality and ensures
long
-
term reliability.
•
Fully discrete, high current, output stage
Many lesser amplifiers make do with their output devices integrated into a single, large chip—this is very convenient for
the manufacturer, but places some serious limitations on the performance capability of the unit. With a fully discrete
design, we are able to ensure that the very best devices are used, as well as ensuring that parameters such as peak
current, output impedance and thermal performance are never compromised.
•
4 Line level Inputs—2 Balanced, 2 unbalanced
Up to four line
-
level devices can be connected to the amplifier, the higher quality balanced inputs (with the use of a
suitable adapter) can be converted to unbalanced mode if required. All inputs offer the same high performance levels with
regard to sensitivity and bandwidth, with the balanced inputs inherently offering the best performance with regards to
noise rejection. The input sockets themselves have been chosen to offer the best in terms of audio performance and
long
-
term reliability
•
High performance Phono stage with adjustable gain, input resistance and capacitance
Derived from our hugely successful Pulsus phono stage, the Sigsum's phono stage offers unrivalled performance and
flexibility when compared to other designs. Designed to offer the best performance in terms of distortion, noise and
compliance with the RIAA specification—but most importantly, it sounds superb.
•
Superior headphone amplifier, capable of driving almost any conventional, dynamic headphone
Most headphone amplifiers take the form of an afterthought, but nothing could be further from the truth with the Sigsum.
As with the main output stage, this amplifier is designed to use discrete components selected to offer the best
performance, and the widest compatibility with the diverse selection of headphones available today. Working in pure Class
‘A’ at low to medium volume levels this is a ’proper’ headphone amplifier complete with its own dedicated power feed.
•
Unbalanced Pre
-
amp output for future systems upgrades
Whilst the performance of the amplifier is exemplary when compared with the very best integrated designs, we know that
with time, people often look for ways of improving performance further still. By using the Pre
-
out sockets built
-
in to the
Sigsum, it is possible to upgrade to even greater performance levels with the addition of the
Celsus
power amplifier (or any
other power amplifier in the
AVID
range).
