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If you connect the amplifier board with current sound, caused by the cause of ground interference caused by the proposed Bluetooth module output do not use the plug line, you need to solder the line, especially the ground line to be soldered, and the line can not be too long, the shorter the better, as thick as possible.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.