The sonos five 4 inch speaker was broken, I restored it and rebuilt it into a new speaker, combined with the DSP audio circuit I produced, for extremely impressive sound.
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https://shopee.vn/kentthoi123
amply: https://shope.ee/89yNsvxKTd
tweeter: https://shope.ee/1VY8VxuZgv
battery indicator circuit: https://shope.ee/89xAxIzR7B
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