{"product_id":"world-designs-hd3sa-headphone-tube-amplifier","title":"World Designs HD3SA Headphone Tube Amplifier (Fully Assembled) Ex-Demo","description":"\u003cp\u003e\u003cstrong\u003eHD3SA\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003eUntil 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.Read the full review of this headphone amplifier in Hi-Fi World, where it was awarded top marks or see the summary on our Reviews \u0026amp; Gallery page.\u003c\/p\u003e\n\u003cp\u003eExternal dimensions: W220 x D314 x H82mm.\u003c\/p\u003e\n\u003cp\u003eWeight 3.6kg\u003c\/p\u003e\n\u003cp\u003eMore info read \u003ca href=\"http:\/\/www.world-designs.co.uk\/v11%20update%20final_htm_files\/WD%20HD3S%20HFW_Sep14.pdf\"\u003ehere \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003ePreferred pick up from Oakleigh VIC. Demo is available by appoinment\u003c\/p\u003e","brand":"Groove Audio","offers":[{"title":"Default Title","offer_id":46700851691710,"sku":null,"price":1500.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/1853\/2030\/files\/6328_resize.webp?v=1777523471","url":"https:\/\/grooveaudio.com\/products\/world-designs-hd3sa-headphone-tube-amplifier","provider":"Groove Audio","version":"1.0","type":"link"}