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A basic sound power testing circuit that used for measuring of preliminary sound power and
sound level which do not require precision or as a sound power testing game.

- Power supply: 9VDC.
- Consumption : 20mA. (stand by), 50mA. (working)
- Adj. sensitivity : trimmer potentiometer.
- PCB dimensions : 59 x 29mm

▶ fk181.pdf