The PCB board widens the pads for resistors, capacitors and chips
8.3
The Bluetooth module I chose is M18, which is connected to the PCB board with a DuPont cable. The speaker I chose is a 3W one. It gets hot after a while. I plan to try another one with a higher power~
8.4
It does sound better after replacing the 10W speaker, but there will be noise when connected to Bluetooth. If you connect it directly to the computer through the conversion interface, there will be no noise, and you can barely listen to music.
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