{"product_id":"bat-vk-90t-tube-power-amplifier","title":"BAT VK-90t Tube Power Amplifier","description":"\u003ch2\u003eVK-90t Tube Power Amplifier\u003c\/h2\u003e\n\u003ch3\u003eThe Sound of Musical Truth\u003c\/h3\u003e\n\u003cp class=\"\"\u003eThe Balanced Audio Technology VK-90t power amplifier features a fuse-less protection circuit, active current sources for its two gain stages, intelligent auto-bias circuit with LED indicators, and high-current, all-triode, zero-feedback, fully balanced topology. Its 25th anniversary industrial design is complemented by new, silver-gold oil capacitors and ultra-transparent internal wiring in the signal path. With VK-90t, BAT realizes that serious listeners want unique technology, user-friendly experiences, and faithful-to-the-source sonics in high-end equipment. The equivalent of having two single-ended amplifiers per channel, VK-90t meets these demands and more—and sounds mesmerizing minutes after being turned on. VK-90t also means there are no tubes to bias; no fuses to replace; no pentodes imitating triodes; and no direct current at the tube output stage. VK-90t is the sound of the future—and musical truth.\u003c\/p\u003e\n\u003ch3\u003eActive Dual-Stage Current Sources for Improved Linearity and Accuracy\u003c\/h3\u003e\n\u003cp class=\"\"\u003eVK-90t extends the advantages of active current sources by including these in both the first and second gain stages of the circuit design. There are multiple benefits to implementing active current sources (solid-state as well as tube) for the first two stages. Specifically, the linearity of the gain stages improves; the adjustments for the first and second gain stages become independent and more easily optimized; and the active source components operate at lower stress level, improving reliability. The final result is an impressive improvement in the linearity, yielding a more accurate representation of the output signal to the original input signal. And that, in essence, is the measure of any amplifier.\u003c\/p\u003e\n\u003ch3\u003eFully Symmetrical, All-Triode Circuit Banishes Conventional Drawbacks\u003c\/h3\u003e\n\u003cp class=\"\"\u003eIn a world of cookie-cutter pentode\/tetrode designs and frail single-ended counterparts, VK-90t stands apart. Its design is fully symmetrical from beginning to end. You can think of it as having two single-ended amplifiers per channel, with their waveforms summed at the output transformer. Since no direct current flows through the output transformer, the latter is a true wide bandwidth design that also reduces low-frequency distortion. When you combine VK-90t’s fully symmetrical circuit with its high-current, all-triode, zero-feedback, fully balanced topology, all of the drawbacks of push-pull and single-ended amplifiers are banished.\u003c\/p\u003e\n\u003cdiv id=\"block-b538cd14fbfb08bd885a\" class=\"sqs-block html-block sqs-block-html\" data-block-type=\"2\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"block-1f3a1f84983240c4ce99\" class=\"sqs-block spacer-block sqs-block-spacer sized vsize-1\" data-block-type=\"21\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row sqs-row\"\u003e\n\u003cdiv class=\"col sqs-col-4 span-4\"\u003e\n\u003cdiv id=\"block-5f3b86228d4f1e024e3a\" class=\"sqs-block html-block sqs-block-html\" data-block-type=\"2\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eDesign topology\u003cbr\u003e\u003c\/strong\u003eSymmetrical single-ended bridge design\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eSignal Path\u003cbr\u003e\u003c\/strong\u003eAll triode signal path from input to output\u2028Second generation silver gold oil capacitors\u003cbr\u003eSecond generation ultra-transparent internal interconnect\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eEase of Use\u003cbr\u003e\u003c\/strong\u003eIntelligent automatic bias combined with fuseless protection circuit\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eGlobal Feedback\u003cbr\u003e\u003c\/strong\u003eNone\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eChassis Construction\u003cbr\u003e\u003c\/strong\u003eAll aluminum 25th anniversary design\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col sqs-col-8 span-8\"\u003e\n\u003cdiv class=\"row sqs-row\"\u003e\n\u003cdiv class=\"col sqs-col-4 span-4\"\u003e\n\u003cdiv id=\"block-d1c7f1e2d27f3ed129b8\" class=\"sqs-block html-block sqs-block-html\" data-block-type=\"2\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eConfiguration\u003cbr\u003e\u003c\/strong\u003eAvailable as either a stereo or monoblock from the factory\u003cbr\u003eStereo amplifier is easily converted to monoblock\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eOutput per channel at 8Ω\/4Ω (@ less than 3% THD)\u003cbr\u003e\u003c\/strong\u003e75W Stereo \/ 150W Mono\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eFrequency Response\u003cbr\u003e\u003c\/strong\u003e7Hz to 200kHz\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eInput Impedance (each phase)\u003cbr\u003e\u003c\/strong\u003eStereo 200 kΩ \/ Mono 100 kΩ\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eInput Sensitivity\u003cbr\u003e\u003c\/strong\u003e1V\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col sqs-col-4 span-4\"\u003e\n\u003cdiv id=\"block-a2ebbfeee288bda69022\" class=\"sqs-block html-block sqs-block-html\" data-block-type=\"2\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eEnergy Storage\u003cbr\u003e\u003c\/strong\u003e600 joules\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eGain\u003cbr\u003e\u003c\/strong\u003e26 dB\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003ePower Consumption\u003cbr\u003e\u003c\/strong\u003e500VA (idle)\u2028\u003cbr\u003e1000VA (full power)\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eTube Complement\u003cbr\u003e\u003c\/strong\u003e4 x 6C33C-B, 6 x 6SN7, 4 x 6H30\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eDimensions\u003cbr\u003e\u003c\/strong\u003e17\" x 8\" x 24\"\u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eWeight\u003cbr\u003e\u003c\/strong\u003e88lb\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"The Music Room","offers":[{"title":"Black \/ Mono Block Pair","offer_id":51267942023449,"sku":"2524newBAT-0003","price":35990.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Stereo","offer_id":51267942056217,"sku":"2524newBAT-0001","price":17995.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Mono Block Pair","offer_id":51267942088985,"sku":"2524newBAT-0004","price":35990.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Stereo","offer_id":51267942121753,"sku":"2524newBAT-0002","price":17995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/BAT_VK-90t_Tube_Power_Amplifier_1.jpg?v=1768990283","url":"https:\/\/tmraudio.com\/products\/bat-vk-90t-tube-power-amplifier","provider":"The Music Room","version":"1.0","type":"link"}