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Green rectangular circuit board with silver heatsinks, gold connectors, black knobs and blue Bluetooth module

2.1 Channel Audio Amplifier Board 220W×2+350W Bluetooth Treble Bass Control AS21

SKU CH-ASKY-9BZ8G

A 2.1-channel Bluetooth amplifier module delivering 220W per stereo channel plus 350W subwoofer output with treble and bass controls for DIY speaker builds

  • 1 channel layout with dedicated subwoofer output for immersive sound
  • 220 W per stereo channel plus 350 W subwoofer power from TPA3255 chip
  • DC 16 V to 38 V supply range with built-in undervoltage protection
  • Works with 30 W to 220 W speakers rated 3 Ω to 8 Ω
  • Bluetooth, AUX and USB inputs selectable via rotary dial

2.1 Channel Amplifier Board

This 2.1 channel audio amplifier board integrates Bluetooth, AUX and USB inputs on a single module. A rotary dial lets you switch sources and change tracks without extra controls. The board uses a TPA3255 power amplifier chip and is designed for DIY speaker builds or upgrades.

Sustained Output Power

Left and right channels each deliver 220 W while the subwoofer channel reaches 350 W. The module accepts a DC supply from 16 V to 38 V and includes undervoltage protection below 16 V. It is rated for speaker loads between 30 W and 220 W with 3 to 8 ohm impedance.

DIY Speaker Upgrade Path

The board replaces separate amplifier modules and source selectors in a custom enclosure. It suits builders who want integrated Bluetooth streaming and tone controls without wiring multiple boards. It does not meet the needs of installations requiring more than three channels or rack-mount form factors.

How it compares

Measured against everything we stock in Hi-Fi Components & Accessories, at today’s prices. Recalculated every night.

Price $54.99
Typical for this category: the median of 410 items is $60.99.

Specifications

No published specifications for this item yet.

Questions about this item

How much heat does the 3255 chip produce when the board runs at 220W per channel all day?

The TPA3255 is a Class D amplifier chip, so it runs cooler than older designs. With a DC16–38V supply and adequate heatsinking on the board, it handles continuous 220W stereo plus 350W subwoofer output without thermal shutdown.

What power supply must I already have to run this amplifier board?

You need a DC power source between 16V and 38V that can deliver enough current for 220W×2 plus 350W peaks. The board includes undervoltage protection below 16V.

Will my existing 4-ohm bookshelf speakers work with the 220W channels on this board?

Yes. The board is rated for 3–8 ohm speakers in the 30–220W range, so 4-ohm bookshelf models within that power band will pair correctly with the left and right channels.

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