This is the circuit design of 1000W stereo audio amplifier. It is a very good design to assemble, easy to build from your board to the acquisition of components, the output transistors are the COMPLEMENTAR 2SC5200 and 2SA1943 relatively cheap and with very good result. In the power supply module we have 6 capacitors 4700uF/80v or more and one 50A bridge rectifier diode, this design can be in versions mono (500 Watts) or stereo (1000 Watts), if it is to mount it in the stereo version it is good to use a transformer of at least 8 Amperes and the voltage in both versions has to be 50v + 50v with central bypass, this transformer can be toroidal or ordinary.

Stereo Audio Amplifier Part Lists

Transistors

10 Transistors 2SC5200
10 Transistors 2SA1943
4 Transistors C2073
4 Transistors A940

Resistors

20 Resistors of 2.2 ohms 1/2W
20 Resistors of 0.33 ohms 5W
4 Resistors of 10 ohms 1W
4 Resistors of 100 ohms 1W
4 Resistors of 5.6K 1W
10 Resistors of 100 ohms 1/4W
4 Resistors of 330 ohms 1/4W
4 Resistors of 1K 1/4W
4 Resistors of 18K 1/4W
2 Resistors of 33K 1/4W
2 Resistors of 56K 1/4W

Capacitors

6 Capacitors of 4700uF/80V or more
6 Capacitors of 100uF/50V
2 Capacitors of 1uF/50V
2 Capacitors of 100pF ceramic
2 Capacitors of 15pF ceramic
4 Capacitors of 330pF ceramic
4 Capacitors of 680pF ceramic
4 Capacitors of 220 pF to ceramic
2 Capacitors of 0.1uF (104) / 250V polyester
5 Capacitors of 0.1uF (104) / 100V polyester

Miscellaneous

2 Integrated Circuits TL071 or UA741
4 15-volt to 1W zener diodes
4 Diodes 1N4007
1 Diode bridge of 35 amps or more. Best if it is 50 Amp
2 Small 2-pin GP connectors
2 large 3-pin Molex connectors
2 large 6-pin Molex connectors
1 50vx50v transformer, or up to 55x55V AC with current 15 amps minimum (stereo version)
2 Sockets for 8-pin integrated
4 sinks of 22 x 10 x 2.5 centimeters
24 mica insulation

1000W Stereo Audio Amplifier PCB Design

Power Supply for 1000W Stereo Audio Amplifier

1000W Stereo Audio Amplifier Stereo Channel Connection

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Circuit Diagram:

The power supply needed for this circuit should be 10A minimum single channel and 20A for stereo channel. It uses symmetrical power supply (dual polarity) with recommended voltage is 63V.

Component List:

The power transistors 2SA1216 and 2SC2922 must be mounted on heatsink to prevent overheating which will affect to the sound performance and make the transistors damaged faster than normal condition.

Loudspeaker Combination:

To get the speakers with great power combining techniques can be used in parallel series, combining each group of speakers should sepaker they will have the same impedance, the same type (Woofer, Mid Range or tweeter) and the same power. Make sure the volume level adjusted in lowest position when make a trial of this 1000w power audio amplifier.

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