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Two small green amplifier boards with volume knobs and switches, 30 by 21 mm, 16 mm tall

VKLSVAN 209-1129 PAM8403 2-channel 3W+3W 5V live sound amplifier board (2 pcs)

SKU CH-ZRC6-K0JVS MPN 209-1129

Two compact 5 V amplifier boards deliver 3 W per channel with built-in volume control and power switch

  • Product type209-1129
  • Two-channel 3 W per channel output drives stereo speakers
  • PAM8403 chip with upgraded 470 µF filter for clear sound
  • Runs from 5 V USB power, stays below 5.5 V limit
  • Compact 30 × 21 mm board fits tight enclosures
  • On-board potentiometer and switch give instant volume control

Compact stereo amplifier board

This VKLSVAN 209-1129 module uses the PAM8403 chip to deliver two channels of 3 W output from a 5 V DC supply. It arrives as a pair of boards measuring 30 mm by 21 mm with a 15 mm profile, rising to about 16 mm once the onboard potentiometer and switch are fitted. The power filter is upgraded to 470 uF for cleaner audio performance. Each board is designed for surface-mount installation in tight enclosures.

Replaces bare amplifier chips

Builders who previously wired a raw PAM8403 or similar Class-D IC can drop in this ready-made module and skip the surrounding passive components. The integrated volume potentiometer and power switch remove the need for external controls, while the 470 uF filter capacitor is already in place. The jump is worth it when a project needs instant stereo output with minimal board space and no separate control circuitry.

Fits USB-powered audio projects

The boards run directly from a standard USB 5 V source such as a PC port or power bank, provided the supply stays below 5.5 V. Polarity protection is absent, so the installer must verify correct + and – connections before applying power. Speakers should be attached before the supply is energised to avoid damaging the chip. The compact footprint frees internal volume for batteries or additional electronics in portable speaker builds.

How it compares

Measured against everything we stock in Stage & PA Amplifiers, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 60% of the 236 comparable items (median $30.49).

Specifications

Product
Brand nameVKLSVAN
Product type209-1129

Questions about this item

Will the 30 mm by 21 mm board fit inside my enclosure?

The board measures 30 mm long, 21 mm wide and 15 mm tall; after the switch and potentiometer are fitted the overall height is about 16 mm.

What is the correct order for wiring the 5 V supply, speakers and USB power?

Connect the speakers first, then apply 5 V DC — never exceed 5.5 V and observe polarity because the module has no reverse-connection protection.

Which component should I check if the audio becomes distorted after extended use?

The on-board 470 µF power-filter capacitor is the part most likely to degrade over time and affect sound quality.

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