{"product_id":"stk4803-sanyo-2-channel-stereo-amplifier-20w-20w","title":"STK4803 Sanyo AF Power Amplifier","description":"\u003ch3\u003eClassic 20W+20W Stereo Audio Power Amplifier Module\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSTK4803\u003c\/strong\u003e is a reliable thick-film hybrid integrated circuit manufactured by Sanyo. Delivering a minimum continuous output of \u003cstrong\u003e20 Watts per channel\u003c\/strong\u003e, this 16-pin module was a centerpiece in mid-range stereo receivers and integrated audio systems during the peak of the analog era. It is renowned for its durability and its smooth, high-fidelity sound reproduction.\u003c\/p\u003e\n\n\u003cp\u003eBuilt using Sanyo's proprietary Insulated Metal Substrate Technology (IMST), the STK4803 provides excellent thermal stability and high-output headroom. It features integrated protection circuitry to safeguard your speakers and internal components, making it the definitive choice for restoring vintage Japanese audio hardware to its original factory performance.\u003c\/p\u003e\n\n\u003ch4\u003eKey Technical Features:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContinuous Power Output:\u003c\/strong\u003e 20W + 20W (at 8Ω, 20Hz to 20kHz, THD = 0.2% typical).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 2-Channel Stereo in a standard 16-Pin SIP (Single In-line Package).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Fidelity Response:\u003c\/strong\u003e Wide frequency range from 20Hz to 50kHz (+0, -3dB).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Protection:\u003c\/strong\u003e Built-in safeguards against over-temperature and short circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e Designed for efficient heat transfer with a max substrate temperature of 125°C.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e Recommended supply of ±25V to ±35V DC (Dual Supply).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Safety Guide:\u003c\/h4\u003e\n\u003cp\u003eThe STK4803 generates thermal energy during operation that must be properly managed. It \u003cstrong\u003emust\u003c\/strong\u003e be securely mounted to a clean, flat heatsink using a fresh layer of high-quality thermal silicone grease. Operating this module without a proper heatsink—even for a five-second diagnostic check—will result in immediate and permanent internal substrate failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eTechnician's Note: Before installing, verify that your dual-polarity power supply rails are symmetrical and discharge all filter capacitors. We recommend checking the output coupling capacitors and emitter resistors (typically 0.22Ω to 0.47Ω), as these are common failure points in older equipment that can stress the new module.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sanyo","offers":[{"title":"New","offer_id":48013257343130,"sku":"SC0008","price":23.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/9477\/8778\/files\/25-STK4803_20Sanyo_20AF_20Power_20Amplifier.jpg?v=1778557082","url":"https:\/\/prellelectronics.com\/products\/stk4803-sanyo-2-channel-stereo-amplifier-20w-20w","provider":"Prell Electronics","version":"1.0","type":"link"}