Other cheap amplifier.

It gives you about 70W in a 4Ohm load.

The Leds are Red, and the power transistors must have a good heatsink.

I also provide a delay for the speaker, that gives 3-4 sec. to activate. When you turn off the power, it will disconect the speaker when the voltage at the filter caps are about 21V.

The schematics of the amplifier is in fig.1, and the power suplly in fig.2.

Figure 1 - The 70W Amplifier Schematic

Figure 2 - The 70W Power Suplly Schematic

And here is the PCB and the component Layout (fig.3 ).

NOT READY YET

Figure 3 - The PCB and Component Layout

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