{"product_id":"stk4221v-sanyo-audiophile-stereo-amplifier-80w-80w","title":"STK4221V Sanyo AF Power Amplifier","description":"\u003ch3\u003ePremium 80W+80W High-Fidelity Stereo Amplifier Module\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSTK4221V\u003c\/strong\u003e is a high-performance thick-film hybrid integrated circuit from Sanyo's prestigious \"V\" series. Engineered for those who demand clinical accuracy and high-output headroom, this module delivers a continuous 80 Watts per channel. The \"V\" series revision incorporates an advanced internal current mirror circuit that slashes Total Harmonic Distortion (THD) to just \u003cstrong\u003e0.08%\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis 22-pin module is a critical replacement for flagship vintage receivers and integrated stereo amplifiers from the 1990s. It provides a more transparent soundstage and significantly improved detail over the standard Series II variants, making it a favorite for audiophile restorations and high-end audio projects.\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 80W + 80W (at 8Ω, 20Hz to 20kHz, THD = 0.08%).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Fidelity Performance:\u003c\/strong\u003e 0.08% THD for transparent, studio-quality sound.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Muting:\u003c\/strong\u003e Integrated circuitry to suppress power-on\/off \"pop\" noise and protect speakers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e Full-range high-bandwidth from 20Hz to 50kHz.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e Recommended supply of ±45V (Absolute Maximum ±65V).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin Compatibility:\u003c\/strong\u003e Member of the STK4201V series; also pin-compatible with STK4201II and STK4141X series.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Thermal Management:\u003c\/h4\u003e\n\u003cp\u003eAs a 160W total output module, the STK4221V generates significant thermal energy. It \u003cstrong\u003emust\u003c\/strong\u003e be securely mounted to a large, high-mass heatsink using high-quality thermal silicone grease. Operating this module without a heatsink—even for a five-second functional test—will cause immediate and permanent internal substrate failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eTechnician's Note: Before installation, verify that the power supply rails are healthy (ideally ±45V) and discharge all filter capacitors. We recommend checking the 0.22Ω to 0.47Ω output emitter resistors, as these often fail if the original module has shorted out.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sanyo","offers":[{"title":"New","offer_id":48013256622234,"sku":"SC0008","price":34.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/9477\/8778\/files\/16-STK4221V_20Sanyo_20AF_20Power_20Amplifier.jpg?v=1778557050","url":"https:\/\/prellelectronics.com\/products\/stk4221v-sanyo-audiophile-stereo-amplifier-80w-80w","provider":"Prell Electronics","version":"1.0","type":"link"}