21-watt Class AB amplifier

21W Class AB amplifier

This is an instrument amplifier for monitoring music on stage. This small design provides 21W of output power. I previously had a decent 10W amplifier (RED Free Circuits), but somehow we burned it out. Now I'm putting this in the old box. I haven't built it yet, but simulations show it works as I designed it. In this design, wiring is important because there's no differential amplifier. I might need to add a Zener diode for ripple suppression, similar to the design above.