{"product_id":"stk4191v-sanyo-audiophile-stereo-amplifier-ic-50w-50w","title":"STK4191V Sanyo AF Power Amplifier 18 Pin Version","description":"\u003ch3\u003ePremium 50W+50W High-Fidelity Stereo Amplifier Module\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSTK4191V\u003c\/strong\u003e is a high-performance thick-film hybrid integrated circuit from Sanyo's prestigious \"V\" series. Engineered for superior sonic transparency, this module delivers a continuous 50 Watts per channel into 8 ohms. The \"V\" series revision incorporates an advanced internal current mirror circuit that achieves a remarkably low Total Harmonic Distortion (THD) of just 0.08%.\u003c\/p\u003e\n\n\u003cp\u003eA favorite among audiophile restorers, the STK4191V is the definitive replacement part for high-end vintage receivers and integrated stereo amplifiers that demand high output without sacrificing clarity or detail.\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 50W + 50W (at 8Ω, 20Hz to 20kHz, THD = 0.08%).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDistortion Performance:\u003c\/strong\u003e Ultra-low 0.08% THD for professional-level audio fidelity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Muting:\u003c\/strong\u003e Integrated muting circuit to eliminate power-on\/off \"pop\" noise.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e Full-range reproduction from 20Hz to 50kHz.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e Recommended supply of ±35.5V (Absolute Maximum ±53V).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal Advantage:\u003c\/strong\u003e Guaranteed operation up to 125°C substrate temperature for enhanced reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Technician's Notes:\u003c\/h4\u003e\n\u003cp\u003eThe STK4191V generates significant thermal energy during high-volume playback. It \u003cstrong\u003emust\u003c\/strong\u003e be securely mounted to a large, flat heatsink using high-quality thermal silicone grease. Because the internal transistors are bonded directly to the substrate, operating the module without a heatsink—even for a brief test—will result in immediate and permanent internal failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eTechnician's Note: Before installing, verify that your power supply rails are symmetrical and ideally near ±35.5V. Check the output emitter resistors and protection circuitry for damage, as a short in the speaker lines is the most common cause of the original module's failure.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sanyo","offers":[{"title":"New","offer_id":48013255803034,"sku":"SC0008","price":28.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/9477\/8778\/files\/2-STK4191V_20Sanyo_20AF_20Power_20Amplifier.jpg?v=1778557011","url":"https:\/\/prellelectronics.com\/products\/stk4191v-sanyo-audiophile-stereo-amplifier-ic-50w-50w","provider":"Prell Electronics","version":"1.0","type":"link"}