Various needs of the amplifiers are all different. Different places and use also requires a different power amplifier as well. For this time i gave a circuit schematic power amplifier based on LM377 ic that has similarities with the LM378 and LM1877. Power is smoothly small ouput is 2 X 2.5 Watt and the impedance 4 ohms. Use of this amplifier suitable for portable radio tuner that can be taken every where.
Resistor
R1___________________2K
R2___________________2K
R3___________________1M
R4___________________1M
Capacitor
C1___________________4.7uF 50V
C2___________________4.7uF 50V
C3___________________100n
C4___________________100n
C5___________________470uF 50V
C6___________________470uF 50V
IC
IC1__________________LM377 , LM378 , LM1877
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