Amplifier Circuits A+ A- Print Email 20W Bridge Audio Amplifier Tone Booster 2*5 W Stereo Power Amplifier Circuit 6 Watt Hi Fi Audio Amplifier 60 Watt Amplifier Circuit Stereo Pre-Amplifier using LA3161 Stereo Headphone Amplifier using LM4910 100W MOSFET Power Amplifier 100W Audio Amplifier using TDA7294