{"product_id":"stk4181v-sanyo-audiophile-stereo-amplifier-ic-45w-45w","title":"STK4181V Sanyo AF Power Amplifier","description":"\u003ch3\u003ePremium 45W+45W High-Fidelity Stereo Amplifier Module\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSTK4181V\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 45 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 \u003cstrong\u003e0.08%\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eA favorite among audiophile restorers, the STK4181V is the definitive replacement part for high-end vintage receivers and integrated stereo amplifiers that demand high output without sacrificing clarity or detail. It provides a more precise and detailed soundstage compared to the standard Series II variants.\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 45W + 45W (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 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 ±34V (Absolute Maximum ±51V).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin Compatibility:\u003c\/strong\u003e Member of the STK4101V series (15W to 50W) and pin-compatible with the STK4102II series.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Technician's Notes:\u003c\/h4\u003e\n\u003cp\u003eThe STK4181V generates significant thermal energy during operation. 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 diagnostic test—will result in immediate and permanent internal failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003ePro Tip: Before installation, verify that your power supply rails are symmetrical and discharge all filter capacitors. We highly recommend checking the 0.22Ω to 0.47Ω output emitter resistors, as these often fail when the original module shorts out.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sanyo","offers":[{"title":"New","offer_id":48013256163482,"sku":"SC0008","price":26.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/9477\/8778\/files\/10-STK4181V_20Sanyo_20AF_20Power_20Amplifier.jpg?v=1778557032","url":"https:\/\/prellelectronics.com\/products\/stk4181v-sanyo-audiophile-stereo-amplifier-ic-45w-45w","provider":"Prell Electronics","version":"1.0","type":"link"}