Amplifier circuit below represents a very small amplifier circuit output. Maximum output is no more than 1W, comprehension is low but received a series of sensitive enough, and power amplifier circuit is very suitable for use in radio receiver, especially on FM radio. Technical information. Minimum Voltage = 4 Volt DC Maximum Voltage = 15 Volt DC Power Output = 0,325 W RL = 8 Ohm Ft = 40Hz - 18KHz Icco = 6mA Part List : R1 = 100K R2 = 2,7R R3 = 1K C1 = 100uF C2 = 220uF C3 = 47uF C4 = 0,01uF