The amplifier unit is from Lingfeng Acoustics

When replacing the battery's positive and negative terminals, don't cut the wires of the positive and negative terminals together!!!!!

1. It is recommended to stick soundproof cotton inside. I don't have soundproof cotton, so I used express delivery foam instead

2. It is necessary to seal the gaps and openings to keep the inside of the box sealed.

3. It's not easy to disassemble without proper support!! You need to be patient!!!

The configuration is as follows

Screws: M3 countersunk *16

Nut: M3 self-locking nut

Battery: 3.7V 9000mAH 18650 battery

Socket: PH2.0

There are also two screws used to fix the amplifier board. I don't know the size of them. They are screws from a laptop, so they are probably M2. You can measure the length of the base and buy them accordingly

You can check the configuration of the electronic components by looking at the diagram yourself

I'll update it later with an installation video tutorial.