{"title":"Stereo 20W Class D Audio Amplifier - MAX9744","handle":"stereo-20w-class-d-audio-amplifier-max9744","url":"/products/stereo-20w-class-d-audio-amplifier-max9744","description":"A compact Class D stereo amplifier breakout based on the Maxim MAX9744. It drives two channels of 4–8 Ω speakers at up to 20 W each, powered from 4.5–14 V DC. With up to 93% efficiency, it runs cool without heatsinks — ideal for portable and battery-powered audio projects.\n\nVolume can be controlled via an included 1 kΩ trim pot (analogue) or via I²C commands from a microcontroller with 64 steps of digital volume adjustment. The board includes polarity protection, audio jacks, terminal blocks, and I²C level shifting.\n\nKey Features\n\n\n20 W Stereo Output – 4 Ω speakers, 12 V supply, THD+N = 10%\n\nClass D Efficiency – 88–93% typical, no heatsink required\n\nPower Supply – 4.5 V to 14 V DC via onboard barrel jack\n\nAudio Input – 3.5 mm stereo headphone jack, up to 3 Vpp (DC or AC coupled)\n\nDual Volume Control – Analogue (1 kΩ pot included) or I²C digital (64 steps)\n\nMax Gain – 29.5 dB\n\nLow Distortion – 0.04% THD+N\n\nLow Power – 20 mA quiescent, 1 µA in shutdown mode\n\nProtection – Short-circuit, thermal overload, and click-and-pop suppression\n\nSpread-Spectrum Modulation – Reduces radiated RF emissions from speaker cables\n\n\nPackage Contents\n\n1× MAX9744 amplifier breakout (SMD components pre-assembled)\n3× 2-pin terminal blocks\n1× 3-pin terminal block\n1× 470 µF power filter capacitor\n1× 1 kΩ trim pot\n\n\n\nNote: Some soldering is required to attach the terminal blocks and included components. Terminal block colour may vary (blue or black).\n\n\nResources\n\nAssembly & Usage Tutorial\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":8921,"title":"Default Title","sku":"AF-1752","price":42.86,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":86,"option1":"Default Title"}]}