{"product_id":"unison-research-triode-25-push-pull-ultra-linear-class-ab-integrated-amplifier","title":"Unison Research TRIODE 25 Stereo Integrated Amplifier","description":"\u003ch3\u003eUnison Research 25 Integrated Amplifier with DAC\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe Triode 25 was born out of the huge success of the long-standing Triode 20 amplifier, and released as part of the 25th anniversary celebrations of Unison Research's formation. It's been developed over an extended period to ensure it is a worthy successor to the Triode 20's name.\u003cbr\u003e\u003cbr\u003eLike its predecessor, the Triode 25 is a push-pull amplifier that utilizes EL34 tubes in the output stage. The push-pull circuit includes a final stage with two power tubes intended for the amplification of the audio signal, and is then followed by a symmetrical output transformer stage that reconstructs the signal into a high-quality linear wave. \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUsing a push-pull structure in this amplifier design allows for numerous benefits, including higher-output power compared to single-ended designs, improved efficiency and no static polarization of the output transformer for greater performance in the output section. However, for this to work well it is essential that all the individual amplification stages are carefully designed and constructed to prevent the formation of dangerous and compromising odd-order harmonic distortion. This is true for the two semi-output amplifiers, and even more important in the output transformer.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe Triode 25 can operate in two modes: triode and pentode. The latter is capable of delivering a maximum power output of over 45 watts per channel (6Ω load) with minimal harmonic distortion across the entire audio band.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe addition of a USB input modernises the Triode 25 and increases its appeal to the growing world of computer audiophiles, who use their laptop or computer as a high-quality audio source for their hi-fi. The USB input is 32-bit\/384kHz and DSD 128 compliant to support the latest standards in studio quality audio.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eKEY FEATURES:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePush-pull integrated valve amplifier\u003c\/li\u003e\n\u003cli\u003e32-bit, DSD-compatible USB input for streaming from a computer\u003c\/li\u003e\n\u003cli\u003eSwitchable Triode and Pentode modes\u003c\/li\u003e\n\u003cli\u003ePremium design throughout\u003c\/li\u003e\n\u003cli\u003eLocally sourced materials\u003c\/li\u003e\n\u003cli\u003eBased on the long-standing Triode 20 design\u003c\/li\u003e\n\u003cli\u003eEL34 tubes in the output stage\u003c\/li\u003e\n\u003cli\u003eRC2 remote with black wood finish included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOutput Stage: Push-pull, ultralinear, Class-AB\u003c\/li\u003e\n\u003cli\u003eOutput Power: Approx. 45 watt per channel (Pentode configuration)  Approx. 25 watt per channel (Triode configuration)\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 6 Ohm\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 47 kOhm \/ 50 pF\u003c\/li\u003e\n\u003cli\u003eNegative feedback: 5 dB or 1.8 dB\u003c\/li\u003e\n\u003cli\u003eValve complement: 2 x ECC83 (12AX7) 1 x ECC82 (12AU7) 4 x EL34 (6CA7)\u003c\/li\u003e\n\u003cli\u003ePower Consumption: 300 watt max\u003c\/li\u003e\n\u003cli\u003eFuses: T6.3A from 100V to 130V T3.15A from 220V to 250V\u003c\/li\u003e\n\u003cli\u003eDimensions: 30 cm x 45 cm x H. 20cm\u003c\/li\u003e\n\u003cli\u003eNet weight : 20 Kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Unison Research","offers":[{"title":"Black-Cherry","offer_id":48574890836275,"sku":null,"price":4999.0,"currency_code":"USD","in_stock":true},{"title":"Cherry-Black","offer_id":48574890869043,"sku":null,"price":4999.0,"currency_code":"USD","in_stock":true},{"title":"Triode 25 BLACK EDITION","offer_id":53123498606899,"sku":null,"price":5999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/0293\/0739\/files\/UnisonResearchTRIODE25StereoIntegratedAmplifier_a234b90b-b878-4c9a-94cc-98e6d0761c58.png?v=1773237503","url":"https:\/\/vinylsound.com\/products\/unison-research-triode-25-push-pull-ultra-linear-class-ab-integrated-amplifier","provider":"Vinyl Sound USA","version":"1.0","type":"link"}