Speaker pasif.

Membuat usb/micro sd player untuk audio ruangan.
Bahan
1.box amplifier compo 18w
2.ac cord
3.travo 3 ampere
4.tone control
5.power amp 38w
6.master 4558
7.kit mp3/fm player usb
8.regulator
9.2 Speaker tower..
..start perakitan