{"product_id":"unison-research-preludio-class-a-stereo-tube-integrated-valve-amplifier-single-ended-ultralinear","title":"Unison Research PRELUDIO Class A Integrated Stereo Tube Amplifier (14 + 14 W RMS)","description":"\u003cp\u003e\u003cspan\u003ePreludio is an integrated tube amplifier that maintains the distinctive technical elements, sound characteristics and stunning looks that Unison Research is known for. It bears an obvious resemblance to the higher-end Sinfonia and Performance amplifiers, but maintains a very appealing price for a product of such prestige.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eUsing double triode ECC82 valves the Preludio’s pre and power amplification gives an exclusively valve amp performance that delivers a natural and dynamic presentation.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eSpecial attention has been dedicated to the design of the output stage, which is based on two KT88 tubes. Tried and extensively tested, the bias setting of the KT88s ensures the best sound performance even after many years, and also contributes to minimising the time it takes for the tubes to warm up to optimal temperature. \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eEvery part of the Preludio has been thoroughly thought out from the circuit boards to the control knobs to offer a premium design and a premium sound. For example, the top-plate is not just good looking, it's made from amagnetic stainless steel with low heat conduction to stop the heat generated by the KT-88s interfering with the internal circuitry.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKEY FEATURES:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStylish tube integrated amplifier\u003c\/li\u003e\n\u003cli\u003eDedicated pre, power and output stages per channel\u003c\/li\u003e\n\u003cli\u003eTube-based Class A amplification\u003c\/li\u003e\n\u003cli\u003e5 gold platted inputs\u003c\/li\u003e\n\u003cli\u003eHigh quality powered design\u003c\/li\u003e\n\u003cli\u003eKT88 tubes in the output stage\u003c\/li\u003e\n\u003cli\u003eRC2 remote included\u003c\/li\u003e\n\u003cli\u003ePremium Cherry Wood finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Data:\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Stage:\u003c\/td\u003e\n\u003ctd\u003eSingle Ended Ultraliner A Class\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power (per-channel):\u003c\/td\u003e\n\u003ctd\u003e14W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance:\u003c\/td\u003e\n\u003ctd\u003e6Ω \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance:\u003c\/td\u003e\n\u003ctd\u003e47kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeedback Factor:\u003c\/td\u003e\n\u003ctd\u003e10dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValves:\u003cbr\u003e \u003c\/td\u003e\n\u003ctd\u003e2 x 6550\/KT88\u003cbr\u003e2 x ECC82 (12AU7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs: \u003c\/td\u003e\n\u003ctd\u003e4 x Line\u003cbr\u003e1 x Tape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs: \u003c\/td\u003e\n\u003ctd\u003e1 x Tape \u003cbr\u003e1 x Subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response: \u003c\/td\u003e\n\u003ctd\u003e15Hz - 50kHz \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption:\u003c\/td\u003e\n\u003ctd\u003e200W max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x D x H):\u003c\/td\u003e\n\u003ctd\u003e37.5 x 40 x 18cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight:\u003c\/td\u003e\n\u003ctd\u003e18kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Unison Research","offers":[{"title":"Cherry","offer_id":48574885429555,"sku":"","price":4299.0,"currency_code":"USD","in_stock":true},{"title":"Mahogany","offer_id":48574885462323,"sku":"","price":4299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/0293\/0739\/files\/UnisonResearchPRELUDIOClassAIntegratedStereoTubeAmplifier_14_14WRMS.png?v=1773237172","url":"https:\/\/vinylsound.com\/products\/unison-research-preludio-class-a-stereo-tube-integrated-valve-amplifier-single-ended-ultralinear","provider":"Vinyl Sound USA","version":"1.0","type":"link"}