{"title":"Adafruit STEMMA Audio Amp - Mono 2.5W Class D - PAM8302","handle":"adafruit-stemma-audio-amp-mono-2-5w-class-d-pam8302","url":"/products/adafruit-stemma-audio-amp-mono-2-5w-class-d-pam8302","description":"The Adafruit STEMMA Audio Amp is a compact mono Class D amplifier based on the PAM8302 chip, delivering up to 2.5W into 4 Ω speakers from a 2.0–5.5V DC supply. With over 90% efficiency at half a watt into 8 Ω, it's ideal for portable and battery-powered audio projects.\n\nThis plug-and-play STEMMA version requires no soldering — audio input connects via a JST-PH 3-pin connector. The output is bridge-tied and drives speakers directly through a filterless design with ferrite bead and capacitor filtering. A built-in trim pot lets you adjust volume down from the default 24 dB gain.\n\nKey Features\n\n\nPAM8302 Class D Amplifier – 2.5W at 4 Ω or 1.5W at 8 Ω (10% THD, 5.5V supply)\n\nWide Voltage Range – 2.0–5.5V DC operation\n\nHigh Efficiency – Over 90% at 0.5W into 8 Ω\n\nVolume Trim Pot – Adjustable from default 24 dB gain\n\nThermal + Overcurrent Protection – Built-in safety features\n\nLow Quiescent Current – 4 mA active, 0.5 mA shutdown\n\n50 dB PSRR – At 1 kHz for clean audio\n\nJST-PH Audio Input – No-solder STEMMA connection (ground-referenced, not differential)\n\nFilterless Design – Ferrite bead + capacitors on output\n\n\nIdeal For\n\nBattery-powered audio projects\nPortable speakers and sound effects\nInteractive exhibits and installations\nWearable audio devices\n\n\nPackage Contents\n\n1× STEMMA Audio Amp breakout board (PAM8302)\n1× Header strip\n1× 3.5 mm screw terminal block for speaker connection\n\n\n\nNote: Speaker not included — use any 4 Ω or greater impedance speaker. The output is bridge-tied and must connect directly to a speaker, not to another amplifier. Terminal block colour may vary (blue or black).\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1557,"title":"Default Title","sku":"AF-5647","price":10.11,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}