The
earliest audio
amplifiers made use of small, 3 element
valves known as directly heated triodes. For many, the simple circuits
that can be
built around such devices better preserve the
structure, colour and feeling within the music than any other circuit
topology.
One of the best sounding triodes, the 2A3, is
in production again and its characteristic linearity has been employed
in a
novel configuration to create a particularly
charming amplifier. The puresound
2A3 is an 18 Watt per channel line level
integrated design that allows for the selection of up to 3 different
source components
and control of the volume by a high quality
ALPS Blue Velvet potentiometer. There are many amplifiers now making use of directly heated triodes but few which adequately address
the particularly awkward issues involved in driving these devices properly. The puresound
2A3 amplifier
features an unusual choke loaded driver stage
which allows the 6SN7 driver valves to deliver the full measure of
signal to
the push/pull output valves. This rather exotic configuration usually results in a tremendous depth to
the tone of instruments and the puresound 2A3 is no exception in this regard. Very high quality components are used throughout
including selected carbon film resistors and SCR polypropylene
capacitors.
The power supply makes use of twin valve rectifiers and choke smoothing. The
output can be configured for use with 4 or 8 ohm loudspeakers. The puresound 2A3 may also be used as a very high quality
stereo power amplifier if the volume control is turned up fully.


Denumiri similare la Amplificator puresound 2A3: 2 A 3, 2 A3, 2A 3

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