ES-11       1 Watt General Purpose Miniature Audio Power Amp  (DC 3 ~ 15V) 

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A battery-operated audio power amplifier that uses the popular TBA820M  audio power amp. IC.  Can be easily adapted to many applications.

The actual output power depends on the supply voltage & the impedance of the speaker used.     ( 8 ohm  speaker NOT  included)    

               Click here for  TBA820M datasheet (pdf)