40w Audio Amplifier Circuit Diagram. A 0 25 ma fuse f1 should be installed. And suitable for 9v battery.

Circuit diagram and explanation the schematic is 40 watt audio amplifier pretty simple. Because it s easy to build and this ic always popular. Simple circuit with higher power output this amplifier circuit is very easy to build.

This transistor draws its operating current through r8 and r9 and provides voltage gain.

Here is the simple 2 x 30w audio amplifier with stk 465 power ic. 2w 2w stereo using 3 lm386 here is an lm386 stereo audio amplifier circuit 2 watts. The active component required is just the main power amplifier chip stk 465. 12v to 40v can be used for powering the circuit.