PURE SOUND A 10 €. 1.070,00 Per offerta TELEFONA / E-MAIL
Amplificatore integrato a valvole 10W per canale, Classe "A "
The A10 is a new, small line integrated amplifier from puresound. Operating in Class A and delivering 10 Watts per channel it is intended for users of high sensitivity loudspeakers or for those seeking high performance with small speakers perhaps in 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.The A10 has earned Best Buy awards in the UK and Russia and has just won a 'Golden Ear' award for best amplifier in Germany's 'Audio' magazine
PURE SOUND A 30 €. 2.295,00 Per offerta TELEFONA / E-MAIL
Amplificatore integrato a valvole 30W per canale
The puresound A30 amplifier was developed to meet the demand for an affordable Class A amplifier that would be compatible with all types of loudspeakers. The A30 is a 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. Class A operation was chosen because it gives lower distortion and a more relaxing, natural sound
PURE SOUND 2A3 €. 3.365,00 Per offerta TELEFONA / E-MAIL
Amplificatore Integrato a valvole 18W per canale, Classe "A
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.
PURE SOUND L10 €. 4.130,00 Per offerta TELEFONA / E-MAIL
stereo linea a valvole, 4 ingressi.
PURE SOUND L300 €. 8.025,00 Per offerta TELEFONA / E-MAIL
L300 Preamplificatore stereo linea a valvole, 5 ingressi.
L300 has 5 inputs and twin outputs (2 pairs single ended and 2 pairs balanced via XLR). The circuit uses output transformers and a sophisticated full valve rectified, choke smoothed, regulated power supply including a 300B triode as the series element. A Line Stage pre-amplifier needs to offer the facility to select between different sources, to provide some means of attenuating the chosen source and then deliver it in an uncorrupted form to the power amplifier. Controlling the Volume In recent times, with the prevalence of digital source components, many audio enthusiasts have adopted the use of passive volume controls incorporating resistive potential dividers and even transformer based attenuators. These are volume controls where attenuation is achieved through the use of tapped transformer windings. On the face of it either of these might appear to offer the purest approach. However, it’s not so simple. Resistive attenuators are generally of quite a high impedance so as not to load the source driving them but in turn confer little drive capability themselves. In some circumstances they can sound quite transparent but it’s a commonly experienced subjective impression, that such attenuators leave the music with a lack of purpose and grip. Long connecting cables may also blunt the high frequency response, a situation which may be worsened by using a following amplifier with low input impedance. Transformer volume controls seem to address the issue of drive capability to some extent, but they have their own problems. A wide bandwidth transformer can be made such that, when using both windings in full, i.e. with no attenuation, it transfers a pretty good facsimile of the source signal. However, as attenuation is applied and the transformer has to transform more and more, difficulties start to arise. By the time significant attenuation is applied, the performance of the transformer no longer looks quite as impressive with differing patterns of resonance being visible at each step. The reproduction of timbre suffers and the sound quality realized alters slightly with each change in level. Auto-formers which attenuate by tapping off a single sided winding have actually proved to be the most transparent passive controls we have tested and yet even they seem to lack a certain something.
PURE SOUND T10 €. 535,00 Per offerta TELEFONA / E-MAIL
Trasformatore per testine MC a bassa uscita. Ratio 1:18 e 1:36
PURE SOUND P10 €. 535,00 Per offerta TELEFONA / E-MAIL
Amplificatore Phono a valvole per testine MM o MC ad alta uscita. Per testine MC a bassa uscita aggiungere trasformatore T10
PURE SOUND M845 €.10.700,00 Per offerta TELEFONA / E-MAIL
M845 Finali mono da 27W in classe A a Triodo valvole , la coppia
The M845 mono power amplifier is a single ended
design based around the 845 power triode. Operating in Class A and giving 27
Watts of output power, it will complement a wide range of medium to high
efficiency loudspeakers. The 845 triode was originally developed by RCA in
1931 as a radio transmitting and audio amplification valve. The anode is
machined from solid graphite to allow high power dissipation. It has an
extremely linear transfer characteristic. In recent years, a renewed interest in
this kind of valve has resulted in them being manufactured again by various
factories in China. Implementing the 845 in a sympathetic circuit which
takes full advantage of its capabilities is not straightforward. The filament
draws a significant amount of power and also forms a part of the signal path so
energising it correctly is a critical part of the design. The valve also
operates with very high voltages across it so again, a careful choice of
filtering components for that high voltage supply is essential such that
adequate current is available to the valve at all audio frequencies
instantaneously. In the M845 this supply includes a hybrid Graetz bridge for the
initial rectification and a substantial smoothing choke as part of its CLC type
filter. Although all of the elements; power supply, circuit topology &
component choice have a profound effect on the overall performance of a valve
amplifier, one of the most important aspects is the design & construction of the
output transformer. A high primary impedance, the resultant large step down
ratio and the need to maintain a high level of insulation between the windings
all conspire against the transformer designer and the quest for extended
bandwidth with efficient power transmission. The M845 utilises an in house
designed output transformer that underwent extensive trials using a variety of
core materials and winding techniques before the final configuration was
chosen.The other difficulty in using the 845 is in the design of a stage capable
of cleanly delivering the voltage swing necessary at its grid to take it to full
output. The M845 incorporates a driver stage based on the 6SN7 triode coupled
via a custom wound, wideband, interstage transformer. The amplifier’s input
stage is directly coupled to this driver meaning that there are no coupling
capacitors used in the circuit at all.
PURE SOUND A 8500 €. 1.835,00 Per offerta TELEFONA / E-MAIL
CD Player A8500 Lettore CD a valvole (2x6N3). Convertitre D/A con sistema Cirrus CS4398A 24 bit 192KHz. Peso 8,5 Kgs.
PURE SOUND MAT €. 445,00 Per offerta TELEFONA / E-MAIL
Mat per giradischi in rame
Weighing 1.4 Kg, the tenuto will require that most suspended subchassis turntable designs are readjusted to provide a level platform. The additional mass does increase the kinetic energy stored by the platter while affording very effective damping of the unwanted resonance that many alloy platters can contribute to the sound of vinyl replay. The Gunmetal also provides a more appropriate impedance match allowing energy imparted into the vinyl by the stylus to be dissipated harmlessly.
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