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FS: World Designs HD3S Headphone Amplifier (Pre-Built in UK)


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Item Condition: New
Shipping Options: Shipping is available at agreed cost.
Suburb or Town: Heatherton
State: VIC
Payment Method: EFT or Paypal +fee
Reason for selling:

Further information:

 

HD3S is made in the UK by World Designs. Available either as a kit or pre-built. This  HD3S standard for sale is built and tested by the manufacturer in UK. 

 

A beautifully simple, yet sophisticated, stereo headphone amplifier design using ECL83 valves. The unit works directly from any source and includes headphone impedance matching for optimum results from your favourite headphones. With the current interest in high quality headphones driven by the portable audio revolution, this is the right product to get the best from them. Until you try a good quality headphone amplifier in place of the  headphone sockets on most portables and amplifiers (where they are, in most cases, an afterthought  to increase the feature count) you do not realise what you are missing.

The circuit utilises twin high specification E/I transformers output that will drive any headphone load from 16 ohms to over 300 ohms depending on how the secondaries are configured, switched by DIP switches for easy re-configuration. The HD3S is a single-ended design, with the power pentode wired up in triode configuration for that added purity, and is as quiet as a mouse.

 

Reviewed by Hi-Fi World :

http://www.world-designs.co.uk/index_htm_files/WD HD3S HFW_Sep14.pdf

 

Included

Manual 

ECL83 valves

Stock IEC Lead

 

Photos:

 

PLEASE READ

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HD3S-External.jpeg

HD3S-Internal.jpeg

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