{"product_id":"unison-research-s6-be-stereo-integrated-tube-amplifier","title":"Unison Research S6 BE Stereo Integrated Tube Amplifier","description":"\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan lang=\"EN-GB\"\u003eDual Mono amplification\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan lang=\"EN-GB\"\u003eCathode Capacitor Less technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan lang=\"EN-GB\"\u003eUnfiltered Sub output that maintains the sound timbre of the amplifier\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan lang=\"EN-GB\"\u003eInput selection circuit implemented using micro relays and Return GND technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan lang=\"EN-GB\"\u003eIn addition to the 4 analogue inputs, inside the amplifier there's the new DAC3, which adds 3 more digital inputs; USB (PCM up to 384kHz, DSD native up to 256x e DoP up to 128x), Tos-link e SPDIF up to 192kHz as standard.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cspan lang=\"EN-GB\"\u003eThe Black Edition boasts advanced technical and sonic performance, featuring a new cosmetic design with a piano black wood front panel, black gun metal finish, and updated lettering graphics.\u003c\/span\u003e\u003c\/span\u003e\u003cspan lang=\"EN-GB\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eTo improve the S6 we worked on its strengths and went even further to achieve higher sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eThe circuitry has been revised in the signal path and power management, again surpassing the milestones already achieved in the S6. Power output is now 40W, 15% more than the standard model. The polarization of the power output valves has been completely revised to eliminate the capacitor and cathode resistor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eThe input selection circuit has been implemented using the same technology designed for our most valuable equipment and extreme care has been taken in the design of the ground paths and channel separation. The valuable audio signal, where possible, travels protected in high-quality coaxial cables.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eThe original S6, introduced in 2001, featured auto-bias polarization. In 2011, the S6 New was introduced, featuring dual mono amplification and a mixed polarization, including auto-bias and negative grid, adjustable for each valve. In the latest Black Edition, the auto-bias system has been completely eliminated.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eExclusively employing Gold Lion valves, the amplifier comprises two double ECC83 triodes for the preamp section and six KT77 for power amplification. Carefully matched Gold Lion valves ensure superior technical and acoustic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eThe first signal triode operates without feedback, polarized using the ionic polarization method refined by Unison Research® over decades. This polarization, coupled with the absence of feedback, results in improved micro-detail and a natural dynamic sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003ePower output valves are polarized using a dedicated negative grid voltage power supply, similar to the\u003cspan\u003e \u003c\/span\u003e\u003ci\u003eSimply 845\u003c\/i\u003e. This polarization method allows for the elimination of electrolytic capacitors at the cathodes of the power valves, preventing capacitor phase shifting and coloration at low frequencies. Consequently, the frequency response extends to the lowest harmonics of the audio spectrum.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eAll power valves operate in Class A, in ultralinear configuration with a 20% tap. The output transformer, with 7 winding sections, is designed for maximum power transfer at an impedance of 6\u003c\/span\u003e\u003cspan lang=\"EN-GB\"\u003eΩ\u003c\/span\u003e\u003cspan lang=\"EN-GB\"\u003e, ensuring optimal compatibility with modern loudspeakers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eThe power supply system has been significantly enhanced, decoupling the anodic voltage of each valve to ensure their independence. Additionally, strategically placed polypropylene capacitors have been added to the power supply, improving transient response and signal dynamics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eThe input selection circuit has been meticulously designed to minimize noise and optimize channel separation. Micro relays with gold-plated silver contacts ensure stable contact over time and prevent crosstalk with other non-selected sources connected to the amplifier. Furthermore, the return grounds of the inputs have been implemented using Return GND technology, guaranteeing an individual path of reduced length for each input.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-GB\"\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"575\" style=\"border-collapse: collapse; width: 669px; height: 180px;\" height=\"180\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"146\" style=\"width: 194px;\"\u003e \u003ccol width=\"429\" style=\"width: 475px;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"146\" style=\"height: 21.375px; width: 110pt;\"\u003eOutput Power\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"429\" style=\"width: 322pt; height: 21.375px;\"\u003e40W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003eBandwidth (-1 dB)\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003e15Hz - 30kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003eSignal Valves\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003e2 x ECC83 Gold Lion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003eOutput Power Valves\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003e3 x KT77 Gold Lion in parallel for each channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003ePolarization\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003ePure Class A in ultralinear configuration with tap at 20% (power valves)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003eInputs\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003e4 line RCA, 1 USB, 1 SPDIF, 1 Toslink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003eOutputs\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003e1 subwoofer RCA (stereo)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 21.375px;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" style=\"height: 21.375px;\"\u003eDimensions (W x H x D)\u003c\/td\u003e\n\u003ctd class=\"xl65\" style=\"height: 21.375px;\"\u003e35 x 22 x 50 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Unison Research","offers":[{"title":"Default Title","offer_id":68635171914009,"sku":"7208newUNSN","price":7499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/UnisonResearchS6BE_1.jpg?v=1794509448","url":"https:\/\/tmraudio.com\/products\/unison-research-s6-be-stereo-integrated-tube-amplifier","provider":"The Music Room","version":"1.0","type":"link"}