{"product_id":"stk4042ii-sanyo-mono-power-amplifier-hybrid-ic-80w","title":"STK4042II Sanyo AF Power Amplifier","description":"\u003ch3\u003eHigh-Output 80W Mono Audio Power Amplifier Module\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSTK4042II\u003c\/strong\u003e is a heavy-duty thick-film hybrid integrated circuit from Sanyo's trusted \"Series II\" line. Capable of delivering a continuous \u003cstrong\u003e80 Watts\u003c\/strong\u003e of output, this module is a staple replacement part for high-performance vintage receivers, dedicated subwoofer amplifiers, and professional-grade active monitoring systems.\u003c\/p\u003e\n\n\u003cp\u003eThe STK4042II is specifically engineered for split-power supply systems and includes an internal constant-current circuit to significantly reduce supply switch-on and switch-off shock noise (\"thump\"), ensuring the safety of your high-excursion drivers.\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 Minimum (at 8Ω, 20Hz to 20kHz, THD = 0.4%).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e 0.4% at full power; 0.3% typical at 1.0W (1kHz).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Mono (Single Channel) in a standard 15-pin hybrid package.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e Full-range audio capability 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 a versatile pin-compatible series (20W to 200W), allowing for modular repair and design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Thermal Management:\u003c\/h4\u003e\n\u003cp\u003eDue to its 80W output, the STK4042II generates significant thermal energy during operation. It \u003cstrong\u003emust\u003c\/strong\u003e be securely mounted to a high-mass heatsink using premium thermal silicone grease. Running this module without a heatsink—even for a few seconds of testing—will cause immediate and permanent internal substrate failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eTechnician's Note: Before installation, check your power supply rails for symmetry and ensure filter capacitors are fully discharged. We highly recommend verifying the health of the output emitter resistors, as a previous failure in the speaker lines often damages these components along with the original IC.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sanyo","offers":[{"title":"New","offer_id":48006075613338,"sku":"SC0007","price":27.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/9477\/8778\/files\/41-STK4042II_20Sanyo_20AF_20Power_20Amplifier.jpg?v=1778389490","url":"https:\/\/prellelectronics.com\/products\/stk4042ii-sanyo-mono-power-amplifier-hybrid-ic-80w","provider":"Prell Electronics","version":"1.0","type":"link"}