{"product_id":"stk412-530-finished-amplifier-board-audiophile-grade","title":"STK412-530 Finished Amplifier Board, Audiophile-Grade","description":"\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003ePrimary Voltage:\u003c\/strong\u003e 33-0-33V AC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eSecondary Voltages:\u003c\/strong\u003e 17-0-17V AC \u0026amp; 14-0V AC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/image-1-7.webp?v=1775905500\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAbout SANYO Semiconductor (an ON Semiconductor Company)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eSANYO Semiconductor Co., Ltd. (an ON Semiconductor company) is a semiconductor manufacturing company with excellent power device technologies, such as miniaturized packaging, high-efficiency switching, and high-density packaging, as well as world-class analog technology. Its analog-related assets include extensive process technologies, analog design expertise, skilled analog engineers, and specially designed and manufactured energy-saving and environmentally friendly devices, such as hybrid integrated circuits for inverters. SANYO Semiconductor’s core devices include discrete circuits, general-purpose analog LSIs, ASSPs, and hybrid ICs, widely used in various products like personal computers, printers, cable TV systems, mobile phones, audio-visual equipment, gaming devices, car audio systems, and air conditioners.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAbout SANYO STK (Thick-Film Integrated Circuits)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eThe SANYO STK series is commonly known as “SANYO Thick-Film.” Its meticulously tuned sound performance and the high-precision control in its semiconductor production process are levels that ordinary amateur DIY enthusiasts simply cannot achieve. Beyond offering better soundstage and resolution, its bass impact is significantly stronger—it’s like the difference between a professional athlete and an average player! These thick-film circuits were always custom products specifically made for major audio brands. In the past, many famous manufacturers used them to build power amplifiers. Nearly all major Japanese audio brands of the era adopted them—such as K+H, Sony, Panasonic, Kenwood, JVC, Sansui, Sharp, Pioneer, Aiwa, and more—and continued their use for over twenty years. They influenced an entire generation and represent the quintessential sound of that era, etched deeply into the memory of those who grew up with it, a sound that is unforgettable upon every listen. The SANYO division specializing in amplifier modules was later acquired by the American company ON Semiconductor. Post-acquisition, the integration of SANYO’s traditional craftsmanship with ON’s unique design made subsequent products even more outstanding. They continue to be used by major American and European companies today, such as Bose and Genelec.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAbout the SANYO STK412-530-E Module\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eWe were fortunate to encounter a batch of brand-new, old-stock SANYO STK412-530-E amplifier modules from SANYO’s later production period. It is said that the versions with the “globe” logo and grey casing are products from after ON Semiconductor acquired SANYO’s production lines. These modules incorporated ON Semiconductor’s design and craftsmanship. Products from that phase broke from the traditional, aesthetically unappealing black casing of older SANYO modules, becoming more refined and delicate, with significant improvements in internal build quality as well. Objectively, in terms of listening experience, they far surpass the older SANYO modules.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eUnfortunately, very few products from that time can still be found today. That period coincided with the rapid rise of the internet and the widespread adoption of various portable devices (especially large-screen smartphones), which gradually led many to forget about these high-performance desktop components. Many once-prominent audio manufacturers were forced to shift their product directions, leaving these custom-ordered modules forgotten in the warehouse of the original SANYO packaging plant in the Philippines for over a decade.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eIt wasn’t until late last year that a friend from Shantou connected us with this batch of products. At the time, we couldn’t find any reference material for this product online. With the help of our friend A Liang, we managed to find only a single application screenshot on a foreign website, which gave us the confidence to acquire the entire batch.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eAfter testing, we found this module still holds considerable potential. Its actual power output exceeds that of the STK412-430, and it utilizes a high\/low voltage supply. Lacking official documentation, we provisionally rate its power at \u003cstrong\u003e200W x 2\u003c\/strong\u003e, recommend an operating voltage of \u003cstrong\u003e±45V DC\u003c\/strong\u003e, with the maximum operating voltage not exceeding \u003cstrong\u003e±52V DC\u003c\/strong\u003e. (The schematic indicates it requires dual voltage supply; a reference schematic is available via the link in the product description.)\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eProduct \u0026amp; Sales Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eProduct Version:\u003c\/strong\u003e This is a tested prototype version. Each unit is installed and tested before shipping.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eIncluded Heatsink:\u003c\/strong\u003e The finished board includes a heatsink as shown in the pictures. For high-power operation, this may be insufficient. Users should add additional cooling based on their actual usage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eMain Filter Capacitors:\u003c\/strong\u003e These are second-hand, salvaged Rubycon capacitors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAvailability:\u003c\/strong\u003e Only available as a finished board. No kit version is offered, and components are not sold separately.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Warranted to be functional upon arrival. Damage due to overvoltage is not covered. The finished board carries a \u003cstrong\u003e3-month warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eKey Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003ePower Supply Voltage:\u003c\/strong\u003e AC dual 24-36V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eRecommended Transformer Power:\u003c\/strong\u003e 300W or above\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eOutput Power:\u003c\/strong\u003e 200W x 2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eImpedance:\u003c\/strong\u003e 4-8 Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eDimensions (W x H x D):\u003c\/strong\u003e 120 x 55 x 140 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.45 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/7_O1CN010XAyAK1OQBVtbkyHZ_88221699.webp?v=1775905471\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/8_O1CN01k1YqkJ1OQBVnyx0MQ_88221699.webp?v=1775905866\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/9_O1CN017qZy9d1OQBVtbiQJi_88221699.webp?v=1775905880\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/5_O1CN015mflxm1OQBVrvwS85_88221699_dd55c37b-1a20-475a-9b51-4878956e5908.webp?v=1775905893\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/image-24_1.webp?v=1775905305\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eGuaranteed functional upon arrival. Damage caused by overvoltage is not covered.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eThe finished board comes with a \u003cstrong\u003e3-month warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e AC dual 24-36V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eRecommended Transformer:\u003c\/strong\u003e 300W or above\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eFilter Capacitors (Default Rating):\u003c\/strong\u003e 63V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eOutput Power:\u003c\/strong\u003e 100W x 2 @ 4Ω | 80W x 2 @ 8Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eImpedance:\u003c\/strong\u003e 4-8 Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eDimensions (W x H x D):\u003c\/strong\u003e 125 x 49 x 68 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/10_O1CN01gcG0tz1OQC1JVSFA4_88221699.webp?v=1775905946\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/11_O1CN011iy2KA1OQC1PFmXGr_88221699.webp?v=1775905962\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/12_O1CN01JcA9WP1OQC1P1PQzR_88221699.webp?v=1775905981\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eGuaranteed functional upon arrival. Damage caused by overvoltage is not covered.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eThe finished board carries a \u003cstrong\u003e3-month warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e AC dual 24-35V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eRecommended Transformer Power:\u003c\/strong\u003e 300W or above\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eFilter Capacitors (Default):\u003c\/strong\u003e Rated at 50V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eOutput Power:\u003c\/strong\u003e 200W x 2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eImpedance:\u003c\/strong\u003e 4-8 Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eDimensions (W x H x D):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e125 x 49 x 68 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/image-2-6.webp?v=1775906001\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/14_O1CN01Sf7X7V1OQBoegDgSL_88221699.webp?v=1775906016\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/15_O1CN01pliB901OQBoXgaFOe_88221699.webp?v=1775906033\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/18_O1CN01hc8Uxl1OQBVrMdja9_88221699.webp?v=1775906043\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/19_O1CN01ld4lM11OQBVqQhIqe_88221699.webp?v=1775906067\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/3_O1CN01cIQCmr1OQBVprcoHg_88221699_538f45f8-00ce-4971-a3bd-5d934ee0b835.webp?v=1775906079\" alt=\"\"\u003e\u003c\/p\u003e","brand":"GoMakerHive: Ignite Your Spark into a Blaze.","offers":[{"title":"STK412-490 Amplifier Board-100W x 2","offer_id":66511815606576,"sku":null,"price":59.99,"currency_code":"USD","in_stock":true},{"title":"STK412-530 Version 2-200W x 2","offer_id":66511815639344,"sku":null,"price":69.99,"currency_code":"USD","in_stock":true},{"title":"300w Toroidal Transformer - Dual 33V + Dual 17V + Single 14V","offer_id":66511815672112,"sku":null,"price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/2367\/2112\/files\/image-24_1.webp?v=1775906131","url":"https:\/\/gomakerhive.com\/products\/stk412-530-finished-amplifier-board-audiophile-grade","provider":"GoMakerHive: Ignite Your Spark into a Blaze.","version":"1.0","type":"link"}