{"product_id":"wa24-20th-anniversary-edition-headphone-amplifier","title":"Woo Audio WA24 20th Anniversary Edition Headphone Amplifier","description":"\u003ch2\u003e\u003cspan\u003eDescription\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"\"\u003eTwenty years ago, Woo Audio began its journey with the creation of the WA1, an innovative vacuum tube amplifier. Built in a small apartment in Queens, New York, by a father and his two sons, this amplifier was crafted from readily available components sourced from local electronics stores like RadioShack and surplus outlets. The WA1 demonstrated an impressive ability to enhance the sound of the modest Sennheiser HD650 headphones, inspiring the team to pursue new ways to improve the listening experience for music lovers. Now, in celebration of its founding in 2004, Woo Audio proudly introduces the WA24 20th Anniversary Edition. The next chapter begins now.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eRedefining the Listening Experience\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"\"\u003eBuilt with knowledge from over twenty previous amplifiers, the all-new WA24 is a reference-level amplifier engineered to redefine your headphone listening experience. It brings you closer to the music than ever before, immersing you in the artist’s true intent with stunning clarity and detail. Unveiled in its purest form, every note and every subtle nuance is delivered with breathtaking precision, creating a soundstage so immersive that you’ll feel like the performance is happening live, right in front of you. The anodized gold 20th Anniversary plaque symbolizes Woo Audio’s commitment to producing long-lasting products for a lifetime of musical enjoyment.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA Masterpiece of Design\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"\"\u003eEvery internal component of the WA24 20th Anniversary Edition is carefully selected and thoughtfully laid out for unparalleled sonic performance. At its core are four custom-made 3A\/109E mid-gain, direct-heated triode power tubes, chosen for their exceptionally low noise and long-lasting durability. The amplifier’s Class-A single-ended topology ensures the purest amplification possible, while the oversized output transformer—a hallmark of Woo Audio design—delivers maximum power and dynamic range, even for the most demanding headphones.\u003c\/p\u003e\n\u003cp class=\"\"\u003eThe WA24 introduces a groundbreaking innovation: the in-house developed STEP-UP Driver. This precision step-up transformer, built with a nano-crystalline core and oxygen-free copper wiring, redefines amplification. By replacing traditional active drivers, such as vacuum tubes or transistors, it simplifies the circuit, reduces interference, and dramatically enhances performance. The two-tier chassis, precision-machined from a single block of high-grade aluminum, balances modern elegance with timeless craftsmanship. Each element is methodically designed for both form and function, with an individually shielded enclosure that minimizes internal electrical noise and microphonics. The result is an extraordinarily low noise floor, making the WA24 one of the quietest and most refined vacuum tube amplifiers ever created.\u003c\/p\u003e\n\u003cp class=\"\"\u003eEnjoy stereo channel precision from the 50mm brass-enclosed ALPS Alpine RK50 potentiometer, integrated into a substantial-feel volume knob housed within a precisely fitted, slotted, curved shield, delivering a tactile experience as refined as the amplifier’s sound. The sandblasted, anodized body flows seamlessly with its contours, while the elegant coke-bottle-shaped 3A\/109E vacuum tubes blend classic design with modern sophistication.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eUnlock the Future of Sound\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"\"\u003eThe WA24 20th Anniversary Edition is more than a headphone amplifier—it’s the culmination of 20 years of unwavering dedication to design and sonic excellence. This is Woo Audio’s finest creation yet—the amplifier you’ve been waiting for. Experience music like never before.\u003c\/p\u003e\n\u003cdiv class=\"col sqs-col-6 span-6\"\u003e\n\u003cdiv id=\"block-7ab3ace0f6af9ba10a4f\" data-border-radii='{\"topLeft\":{\"unit\":\"px\",\"value\":0.0},\"topRight\":{\"unit\":\"px\",\"value\":0.0},\"bottomLeft\":{\"unit\":\"px\",\"value\":0.0},\"bottomRight\":{\"unit\":\"px\",\"value\":0.0}}' data-block-type=\"2\" class=\"sqs-block html-block sqs-block-html\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003ch2\u003e\u003cstrong\u003eHighlights\u003c\/strong\u003e\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col sqs-col-6 span-6\"\u003e\n\u003cdiv id=\"block-1492b2911449e2ce22e6\" data-border-radii='{\"topLeft\":{\"unit\":\"px\",\"value\":0.0},\"topRight\":{\"unit\":\"px\",\"value\":0.0},\"bottomLeft\":{\"unit\":\"px\",\"value\":0.0},\"bottomRight\":{\"unit\":\"px\",\"value\":0.0}}' data-block-type=\"2\" class=\"sqs-block html-block sqs-block-html\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003cul data-rte-list=\"default\"\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eIntroduced in September 2024\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eLatest flagship headphone amplifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eDesigned and assembled in New York, USA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eThree-year limited warranty [\u003ca href=\"https:\/\/wooaudio.com\/faq\" target=\"_blank\"\u003elearn more\u003c\/a\u003e]\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eREVOLUTIONARY CIRCUIT AND MECHANICAL DESIGN\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-rte-list=\"default\"\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eSingle-ended, all-tube design (not hybrid), Class A with zero-feedback operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003ePoint-to-Point wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eTwo-tier chassis isolates the tube amplifier (top) from the linear power supply (bottom)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eCNC-machined aluminum chassis milled out of a solid block of aluminum\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eInsolated active and passive components achieve the lowest noise-floor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eReduced wiring length through a shortest-path wiring schematic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eSelf-biasing amplifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eNEXT-GENERATION TECHNOLOGY\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-rte-list=\"default\"\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eStreamlined and refined circuit topology:  \u003cbr\u003eAudio input -\u0026gt; STEP-UP Driver -\u0026gt; Single-ended Triode power tubes -\u0026gt; Output Transformer -\u0026gt; Audio output\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eDirect-heated single triode vacuum tubes in parallel to ensure the purest amplification\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eOversized in-house developed output transformers deliver maximum output for the most demanding headphones.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003ein-house developed STEP-UP Driver delivers unmatched accuracy and the lowest noise floor for the most efficient full-sized headphones and In-ear headphones (IEMs).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eThe lowest noise floor among our desktop tube amps results in pitched dark background noise with most full-sized headphones, suitable for many in-ear monitors (IEMs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePRECISELY CHOSEN\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-rte-list=\"default\"\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003ePower tube: custom-made 3A\/109E vacuum tube in a closely matching quad (4 tubes)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eALPS Alpine RK50 volume potentiometer in a brass enclosure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eWBT RCA connectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003ePolytetrafluoroethylene (PTFE) tube sockets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003ePTFE-insulated silver-coated OFC hook-up wires\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eAudio-grade thin film filtering capacitors in HV power supply\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTube Upgrade\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"\"\u003e\u003cspan\u003eDesigned in collaboration with StradiTube. The new production PP3\/250 is engineered to original Mazda U.K. specs, its directly heated, single triode unlocks greater output power, deeper soundstage with a holographic presentation. Every note in your music comes alive with unparalleled instrument separation revealing inner details with stunning transparency.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-rte-list=\"default\"\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eInputs: XLR x 1, RCA x 2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eHeadphone outputs:\u003c\/p\u003e\n\u003cp class=\"\"\u003eBalanced: 4-pin XLR and 4.4mm Pentaconn®\u003c\/p\u003e\n\u003cp class=\"\"\u003eUnbalanced: 6.3mm (1\/4”) and 3.5mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eFrequency response: 10Hz–40kHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eCompatible headphones: 8–600 Ohms impedance and 74dB–120dB sensitivity rating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eFinish: black and gold anodized aluminum, sandblasted finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eCompatible AC voltage built for regional use: 100v – 240v\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003ePower consumption: 40W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eUnit Dimensions with tubes installed: 15-1\/2” L x 10-5\/8” W x 7-3\/4” H (390mm x 270mm x 197mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eWeight: 38 lbs (17 kg)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"col sqs-col-6 span-6\"\u003e\n\u003cdiv id=\"block-62ce0daf781aa42de5b9\" data-border-radii='{\"topLeft\":{\"unit\":\"px\",\"value\":0.0},\"topRight\":{\"unit\":\"px\",\"value\":0.0},\"bottomLeft\":{\"unit\":\"px\",\"value\":0.0},\"bottomRight\":{\"unit\":\"px\",\"value\":0.0}}' data-block-type=\"2\" class=\"sqs-block html-block sqs-block-html\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003ch2\u003e\u003cstrong\u003eIn the Box\u003c\/strong\u003e\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col sqs-col-6 span-6\"\u003e\n\u003cdiv id=\"block-24c7fcaed33b103f1a43\" data-border-radii='{\"topLeft\":{\"unit\":\"px\",\"value\":0.0},\"topRight\":{\"unit\":\"px\",\"value\":0.0},\"bottomLeft\":{\"unit\":\"px\",\"value\":0.0},\"bottomRight\":{\"unit\":\"px\",\"value\":0.0}}' data-block-type=\"2\" class=\"sqs-block html-block sqs-block-html\"\u003e\n\u003cdiv class=\"sqs-block-content\"\u003e\n\u003cdiv class=\"sqs-html-content\"\u003e\n\u003cul data-rte-list=\"default\"\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eWA24 20th Anniversary amplifier x 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003e3A\/109E vacuum tube x 4\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003eQuick start guide\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"\"\u003e*AC power cord and audio cables are not included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\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\n\u003c\/div\u003e","brand":"ABYSS Headphones","offers":[{"title":"Stock Tubes (+0$)","offer_id":45267922583748,"sku":"WOOAUD-WA24-1","price":19336.0,"currency_code":"AUD","in_stock":true},{"title":"StradiTube PP3\/250 (+$1899)","offer_id":45267922616516,"sku":"WOOAUD-WA24-2","price":22161.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2685\/4510\/files\/DSC04103.jpg?v=1741887430","url":"https:\/\/abyss-headphones.com\/en-au\/products\/wa24-20th-anniversary-edition-headphone-amplifier","provider":"ABYSS Headphones","version":"1.0","type":"link"}