Kronos AV
About
Puresound
Puresound is a UK based company producing an exceptional range of valved products. Designed by Guy Sergeant who has vast experience in the industry having worked for Audio Innovations. Puresound’s range includes integrated amplifiers, phono stages, step up transformer, pre amplifiers and power amplifiers.
Many of their designs include valve rectification despite their modest pricing and their products offer not just exquisite sound quality, but also exceptional value for money.

Puresound A30R Tube Integrated Amplifier (Ex Demo)
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  • Sale
  • £1,424.25
  • Regular price £1,899.00


Availability: In Stock (Same Day Despatch) 

Original Boxes: Yes

Condition: Immaculate

 

New Features (From the original A30) 

  • Remote Control (with motorised volume pot) 
  • A new arrangement of Twin Power Transformers 
  • Gloss Black Finish (Same as the M845) 
  • Updated Styling

 

The puresound A30R amplifier was developed to meet the demand for an affordable Class A amplifier that would be compatible with all types of loudspeakers.  The A30R 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.

The amplifier uses the very robust Electro Harmonix 6550 output valves in an Ultra Linear Push Pull configuration.  This arrangement gives a combination of power and clarity that is difficult to beat.  The amplifier uses an Auto Bias system, which means that replacement output valves should be fitted as matched pairs.  There will be no need to reset or monitor bias conditions. 

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 output stage can also be switched to triode-coupled configuration.  This further linearises the operation of the valves at the expense of some output power.  It may be preferable with higher sensitivity loudspeakers. 

The A30R may also be used as a very high quality stereo power amplifier if the volume control is turned up fully. When partnered with appropriate ancillary equipment the A30 is capable of very satisfying performance. 

Why this amplifier?  Why now? 

With the recent interest in lower powered Single Ended triode amplifiers has come the realization that to get the best from these, the speakers used have to be both sensitive and quite large to give truly satisfying results. There are also not that many good, high sensitivity (>97 dB/W) designs available at any price never mind at price levels the majority of music lovers can afford. However, there are some very good loudspeakers currently being made with sensitivities between 88 and 94 dB/W. These are sufficiently revealing to make the virtues of simple, high quality amplification readily apparent, although in most cases the output of a typical single ended amplifier is insufficient to give the scale and drama many types of music demand. A good amplifier with 25 -30 watts of output power is more than enough to drive this type of loudspeaker to sensible levels even in quite a large room. For simplicity a valve amplifier is preferable. 

Recently, there has been an increase in the number of  relatively affordable valve amplifiers made in China. Many of these are compromised by the quality of their transformers, components, layout and because they operate in Class AB or B to give a higher power specification. They often also use a lot of negative feedback in an attempt to compensate for these shortcomings with a consequential impact on clarity and low frequency control.  For some 10 years there has been a lack of affordable Class A valve amplifiers. 

The puresound A30R operates fully in Class A up to its rated output so it does not change character at any signal level. There is none of the distortion caused by output devices switching on and off and therefore no requirement for excessive feedback to correct for it. The 6550 valves supplied are the extremely robust Russian Electro-Harmonix variety and are quite content with dissipating the power required to maintain Class A operation up to 30 Watts. The valve rectifiers used keep the high voltage power supply clear of the noise that can be introduced by silicon rectifiers. A substantial choke is also incorporated to keep the power supply impedance low. The output transformers also give extremely wide bandwidth allowing very solid low frequency performance as well as exceptional reproduction of timbre. 


These design features combined with the use of high quality passive components, octal based input and driver triodes and an elegant but simple internal layout results in an amplifier which sets a new benchmark for performance, build quality and value.

  • Class A operation
  • Gloss Black Finish
  • Twin power transformers
  • Remote Control
  • Motorised Volume Pot
  • 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) 6550 output tubes
  • Very substantial construction including cast metal transformer shrouds. 
We have several deomonstation areas in both of our branches. Please give us a call on 03435236169 or email support@kronosav.com to enquire about hearing products at your local branch. 

Please always contact us before to make sure the product(s) are available

Here at Kronos AV, we have vast experience with e-commerce sales. Making sure that your parcel arrives undamaged is a huge priority for us. That’s why at Kronos AV, we only use premium couriers for all our orders. All our parcels are shipped with DPD or Royal Mail and are always sent Signed For to make sure it gets to the right person. 

DPD gives you an hourly window for delivery so you can make sure you are home, and you can of course track your parcel all the way from despatch to your front door, offering you peace of mind. 

If for any reason your parcel does arrived damaged, please get in touch, and we will be happy to get everything resolved for you. We are always on hand to help!

Details

Delivery is FREE on all orders over £50. In order to offer FREE delivery to UK customers, we use several premium couriers to ensure your delivery arrives safe.

Most large orders (over 2kg) ship using DPD or DHL courier and smaller orders (under 2kg) by Royal Mail signed for services.

The most appropriate courier will be chosen for the items ordered to ensure the quickest possible delivery.

We can offer very generous trade in offers across the majority of our product range. 

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If you have any question, please feel free to call us on 03435236169 or email support@kronosav.com