Can only use the case, put 24V5A power supply into it, and add TPA3116 digital power amplifier board to form 2.1 channel high-fidelity digital power amplifier.
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Using the original RCA jack of the machine as a signal input, adding an MP3 decoding board, you can play the music in the TF card and U disk. You need to be able to do that. The speaker is prepared by itself, and the diameter of the speaker is better than 20 cm, so that even if there is no heavy bass speaker, the effect will be very good.