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The board is a finished board that has been soldered and tested. Connect the speaker box, then connect the appropriate power and connect to the BT to play, or connect the sound source input correctly. Features: It is a portable power amplifier board for 2.1CH speakers.

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Rated power: 18W ×6 Working voltage: dual group AC 12V Signal to noise ratio: 86dB Distortion: less than 0.01% Frequency response: 20Hz--20KHz

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Tpa 3116 d2, 5.1 class d amplifier with surround sound system, 400 watt rms💣