Pure Sound
Due
to the current fluctuations in exchange rates and the
impact of the recession on manufacturers, please regard the
prices on this page as ‘guide’ only. If you are interested
in the equipment you must contact me for a current
price.
Pure
Sound 2A3 Integrated Class A Valve Amplifier
£1495
The Pure Sound 2A3 is an integrated Class A valve
amplifier, based on 2A3 valves which create a very warm and
charming amplifier. The 2A3 is one of the best sounding
valves and is in production again. The Pure Sound 2A3 is an
18 watt per channel line level integrated design that
accepts upto 3 different source components. Don't let the
18 watts put you off though, as the 2A3 has plenty of power
on tap to drive even reasonably sized floorstanding
speakers.
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 Pure Sound 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 Pure
Sound 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. There are speaker terminals
for both 4 ohm or 8 ohm loudspeakers. The Pure Sound 2A3
may also be used as a very high quality stereo power
amplifier if the volume control is turned up fully
Pure
Sound A10 Integrated Class A Amplifier
£595
The
Pure Sound A10 is a new integrated amplifier, operating in
Class A and delivering a warm, rich valve sound, an ideal
choice for valve lovers with limited space. It features 10
Watts per channel and is intended for users of high
sensitivity loudspeakers or for those seeking high
performance with small speakers in a smaller environment
such as a bedroom or study. The A10 accepts two line level
inputs and may be switched to drive 4 or 8 ohm
loudspeakers. The circuit is based around the sweet
sounding 6P14 a modern equivalent to the EL84/6BQ5
family.
- Class A operation
- 3 Line level inputs
- 10 Watts per Channel Output
- 4 and 8 ohm output taps
Pure
Sound A30 Integrated Class A Valve Amplifier
£1195
The Pure Sound A30 is a Class A integrated valve amplifier
capable of delivering pure Class A operation at 30W per
channel and features a spec previously unheard of at this
price. It was developed to provide an affordable Class A
amplifier compatible with all types of loudspeakers with
excellent sound quality. Class A operation was selected
because of lower distortion and a smoother, relaxing and
more natural sound.
The
A30 includes 3 line level inputs and comes complete with
very robust Electro Harmonix 6550 output valves in an Ultra
Linear Push Pull configuration, a combination of power and
clarity that's hard to beat. The A30 also uses an
Auto Bias system, meaning that replacement vavles should be
fitted as pairs but there isn't any requirement to set or
adjust bias - a task which has traditionally required on
valve amps.
For
flexibility, the A30 features outputs for both 4 ohm and 8
ohm speakers and is able to drive even very large speakers
with ease due to its design. We have this on demonstration
with a pair of floorstanding Focal 918 Profile speakers in
a large room and the resulting sound is simply sublime. The
A30 is the first affordable Class A valve amplifier in many
years and opens up the wonderfully warm and involving sound
of valves for a modest price.
- Class A operation
- 3 Line level inputs
- 30 Watts per Channel Output
- 4 and 8 ohm output taps
- Twin valve rectifiers
- Choke smoothing
- ALPS potentiometer
- SCR coupling capacitors
- Carbon film resistors (for better sound quality)
- ElectroHarmonix ( Russia n) 6550 output tubes
Pure Sound L300 Line Level Pre Amplifier £4495
The Pure Sound L300 line level pre amplifiers features 5 inputs and twin outputs (2 sets RCA and 2 sets balanced XLR), a circuit with output transformers and a sophisticated full valve rectified, choke smoothed, regulated power supply including a 300B triode as the series element. The L300 follows some significant research and development at Pure Sound, resulting in several advancements in purity of circuit design and signal transfer. By properly addressing the simple yet important aspects of design below, the L300 offers a truly high end bridge between source and power amps.
In
the L300, source selection is via a high quality switch
located near to the input sockets. The chosen source is
routed to a high quality film potentiometer and from there
on to the audio circuit. This consists of 2 directly
coupled triode stages, the second loaded by an output
transformer which steps down the amplified signal allowing
it to be coupled to the power amplifier at a manageable
level and via a low impedance output. The output stage of
the L300 is impervious to long interconnecting cables or
lower impedance power amplifier input stages. The use of
output transformers also allows the option of a true
balanced output configuration if desired.
A
low gain, low output impedance stage is in itself nothing
new. Many transistor pre-amplifiers are similarly
specified. However, they usually achieve it by means of
excessive negative feedback which is highly detrimental to
the subjective reproduction of music.
The
L300 also incorporates an extremely sophisticated regulated
power supply to maintain constant operating conditions for
the audio circuitry. It includes a valve rectifier, a choke
filtered stage and then a series regulator featuring the
300B power triode as the passing tube. A very elaborate
error amplifier referenced to a gas voltage reference valve
allows the circuit to precisely maintain the high tension
supply regardless of fluctuations in the mains supply and
the varying current drawn by the audio circuit. Filament
supplies are also fully regulated to further reduce the
potential for noise.
The
L300 preserves the verve and energy in recordings that
almost all pre-amplifiers and passive volume controls
otherwise lose. It does this without sacrificing
transparency or introducing euphonic colouration to the
sound.
Pure
Sound P10 MM Phono Stage
£585
The
Pure Sound P10 phono stage is a valve phono stage for
moving magnet (MM) cartridges built with strict performance
criteria to produce a wonderfully warm and involving sound.
The P10 features an elaborate HT power supply which is
extremely stable regardless of the demands made by the
audio signal, thus giving the P10 a stability and poise
which allows it effortless reproduction of even the most
demanding records. Valve filaments are also fed by a DC
supply thereby ensuring constant operating conditions for
the amplifier. Gain is set to the MM benchmark of x100 gain
with standard 47k Ohms impedance. A stunning phono stage
and a bargain at this price - pure and simple.
Pure
Sound T10 MC Step Up Transformer
£265
The
Pure Sound T10 moving coil transformer can be added to any
standard moving magnet phono stage to allow the use of a
moving coil cartridge, with adjustable load to match your
cartridge. The T10 must be added to a moving magnet phono
stage to be used (it can not be used as a stand alone
moving coil phono stage), though it will sound particularly
good with Pure Sound's P10 phono stage.
The
transformers have a step up ratio of 1:15 and load is
adjustable between 30, 50, 75, 100 and 200 ohms.
