Reddit reviews HiLetgo Mini 3W+3W DC 5V Audio Amplifier Handy Digital Power Amp Module Board Dual-Channel PAM8403 Stereo Amplifiers with Potentiometer for DIY Portable
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It is a small digital power amplifier chip, high-definition sound quality highlights the advantages of digital chipsSuper small Size (30×22×16mm, NOT included the handle of the potentiometer ), light weight, handy and easy to installFlexible power supply: the module can easily run off three AA batteries, a USB Cell phone charger, a rechargeable Cell phone charge packTop notch potentiometer, easy and smooth to adjust the volume and control the power switchCrisp and Clear sound output, low noise, give you best hearing enjoyment
I see that guide suggests a 3 W amp... when I did this mod I ended up using this 25 W (!) amp, and wondered why the CHIP would shut down whenever i played sound.