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Where small PAM8403-based boards suit embedded alerts and tiny speakers, this board is built for actual speaker system output - two TPA3123 Class D chips deliver 25W to each of the left and right channels plus a dedicated 50W subwoofer output, a genuine 2.1-channel configuration matching how real budget speaker systems are architected. Running from a 12-24V DC supply (15-20V recommended) rather than USB power reflects that step up in scale.
Above 90% efficiency keeps heat generation manageable even at these higher power levels, avoiding the large heatsinks a comparable linear amplifier design would need to dissipate the difference. Separate potentiometer inputs (28.5mm pitch) suggest onboard volume/tone controls rather than needing external pots wired in, and the compact 82x65mm footprint is notably small for the power level delivered.
Common uses are DIY 2.1 speaker system builds (stereo satellites plus a subwoofer), automotive and motorcycle audio upgrade projects running from a 12V vehicle supply, and small powered speaker or soundbar projects needing genuine wattage rather than embedded-alert-level output.
| Brand | Generic |
|---|---|
| Selling unit | PCS |
