This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet. Enhancer materials must be common and accessible to everyone. Construction and adjustment must be simple. The amplifier must be economical and efficient. The whole circuit is based on two Darlington output transistors that with the help of the input circuits give almost perfect results. Technical specifications Output power: 100W (RL = 4Ω, K = 0.1%) or 70W (RL = 8Ω, K = 0.1%) (continuous sinusoidal signal) Power in relation to frequency: <10Hz-100KHz at 100W Distortion: 0.1% at 20Hz-20KHz at 100W Intrinsulation: 0.28% measured at 40Hz and 10KHz at a 4: 1 ratio and Pa = 100W Signal/Noise (SIN): 70 dB Input sensitivity: 0.775V Input resistance: 1...