{"product_id":"su50-hi-fi-pure-class-a-power-amplifier-board-kit-dual-boards-with-balanced-input","title":"SU50 Pure Class‑A High‑Power Amplifier Board Kit, 2 Boards, Balanced Input","description":"\u003ch1\u003eDescription\u003c\/h1\u003e\u003ch2\u003eSU50 Pure Class‑A High‑Power Amplifier Board Kit (1 Set‑2 Boards) | Balanced Input\u003c\/h2\u003e\u003cp style=\"line-height: 2em;\"\u003eBuild your premium‑grade Hi‑Fi stereo amplifier with our SU50 Class‑A power amplifier board kit. This high‑performance combined amplifier features double‑sided thickened gold‑plated FR4 PCB, 2‑mm‑thick substrate and 70‑μm copper foil, delivering ultra‑stable circuit performance and excellent signal transmission.\u003c\/p\u003e\u003cp style=\"line-height: 2em;\"\u003eBuilt‑in multi‑protection speaker circuit covers delayed startup, mid‑point voltage protection and over‑current protection to safeguard your speakers effectively. Adopting heavy‑current wiring and tree‑shaped grounding design, the board achieves an ultra‑high signal‑to‑noise ratio for clean, low‑noise audio output.\u003c\/p\u003e\u003ch3\u003eCore Components\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eOutput Transistor: 3 pairs of brand‑new genuine 2SC3264 \/ 2SA1295 audio‑specific power tubes per channel, idle current: 100mA per tube\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eDrive Tube: 2SA1837 \/ 2SC4793\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eOp‑amp (Optional): LME49720NA or JRC4580DD\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eCoupling Capacitor: Non‑polarized polypropylene MKP capacitor\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eResistor: 718 factory metal‑film resistor\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eElectrolytic Capacitor: High‑temperature resistant electrolytic capacitor\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eRelay: Original Ω‑dragon 16A contact relay\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eAudio Input: Supports balanced input for improved sound quality\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAmplifier Board Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eBoard Dimension: 240mm × 100mm\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eWorking Voltage: DC ±50V\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eOutput Power\n • Class‑A: 30W+30W\n • Class‑AB: 150W+150W @ 8Ω, 300W+300W @ 4Ω\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSU50 Rectifier \u0026amp; Filter Power Supply Board\u003c\/h3\u003e\u003cp\u003eComes matched for your stereo build. Double‑sided gold‑plated FR4 PCB (2mm substrate, 70U copper foil). Equipped with Xiantong 30A fast‑recovery rectifier diodes, it can hold up to 4 capacitors with a maximum diameter of 35 mm.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003eIncluded Parts: 4pcs brand‑new genuine 63V 10000UF electrolytic capacitors\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp style=\"line-height: 2em;\"\u003ePower Board Size: 103mm × 72mm\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cblockquote\u003e\u003cp\u003eNote: One set contains 2 amplifier boards, enough for a complete stereo amplifier system.\u003c\/p\u003e\u003c\/blockquote\u003e\u003ch3\u003eImportant Notice\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eThis is a loose‑component DIY kit. Soldering assembly is required.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eCircuit schematic diagrams are \u003cstrong\u003eNOT provided\u003c\/strong\u003e for this amplifier board. Please do not contact us to request schematics. Do not purchase if you cannot accept this condition.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003ePerfect for Hi‑Fi audiophile DIY projects, home stereo audio builds and custom high‑fidelity amplifier construction.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Lilly Electronics","offers":[{"title":"4580DD kit Without Power Tube","offer_id":40873942286465,"sku":"YS-SU50-4580DD-Kit","price":117.0,"currency_code":"CAD","in_stock":true},{"title":"4580DD Finished Board Without Power Tube","offer_id":40873942319233,"sku":"YS-SU50-4580DD-FIN‑BD","price":185.0,"currency_code":"CAD","in_stock":true},{"title":"Finished Board 4580DD Kit","offer_id":40873942352001,"sku":"YS-SU50-4580DD-Full-Kit","price":264.0,"currency_code":"CAD","in_stock":true},{"title":"Finished Board+4580DD OP Amp","offer_id":40873942384769,"sku":"YS-SU50-4580DD-FIN‑BD","price":345.0,"currency_code":"CAD","in_stock":true},{"title":"LME49720NA Kit Without Power Tube","offer_id":40873942417537,"sku":"YS-SU50-49720NA-Kit","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"LME49720NA Finished Board Without Power Tube","offer_id":40873942450305,"sku":"YS-SU50-49720NA-FIN‑BD","price":199.0,"currency_code":"CAD","in_stock":true},{"title":"Finished Board LME49720NA Kit","offer_id":40873942483073,"sku":"YS-SU50-49720NA-Full-Kit","price":292.0,"currency_code":"CAD","in_stock":true},{"title":"Finished Board LME49720NA OP Amp","offer_id":40873942515841,"sku":"YS-SU50-49720NA-FIN‑BD","price":379.0,"currency_code":"CAD","in_stock":true},{"title":"Without 4 Electrolytic Capacitor Kits","offer_id":40873942548609,"sku":"YS-SU50-NO-Cap-Kit","price":21.0,"currency_code":"CAD","in_stock":true},{"title":"Complete Power Board Kit (kits parts)","offer_id":40873942581377,"sku":"YS-SU50-63V10000UF-Kit","price":45.0,"currency_code":"CAD","in_stock":true},{"title":"Finished Board (Welded)","offer_id":40873942614145,"sku":"YS-SU50-63V10000UF-FIN‑BD","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/8647\/4369\/files\/9bca68405ac72cc75a1d8fb604ae2ad4.jpg?v=1787815204","url":"https:\/\/www.lilly-electronics.com\/products\/su50-hi-fi-pure-class-a-power-amplifier-board-kit-dual-boards-with-balanced-input","provider":"Lilly Electronics","version":"1.0","type":"link"}