1000W power audio amplifier circuit built by transistors

This is a 1000W power audio amplifier circuit built by transistors, from the preamplifier to the final transistor stage. This amplifier circuit is designed for single channel. But if you want a stereo audio system, you can build two identical circuits.

This 1000W power audio amplifier circuit is an amplifier designed with OCL (No Output Capacitor) system, so the output does not use a decoupling capacitor. The advantage of this system is that the output will produce a better frequency response, especially for low frequency response.

1000W power audio amplifier circuit diagram

In order for this audio amplifier circuit to work properly, at least one power supply is required with a current of 10A for one channel and 20A for two channels (stereo). The source voltage of the required power supply is symmetrical to the supply voltage 63VDC.

1000W power audio amplifier circuit components list:

Transistors 2SA1216 and 2SC2922 final level must use heat sinks so that the heat can be directed properly for optimum operation. Using heat sinks also prevents the circuit from overheating which can lead to damage in the amplifier circuit.

1000W Power Audio Amplifier Circuit Speaker Combination

To get the best power output from the speakers, you can combine multiple speakers in series-parallel arrangement. But remember that all speakers, whether it is a woofer, midrange or tweeter, should have the same impedance.

When trying this audio amplifier circuit, make sure the input signal is grounded ahead of time or the preamplifier section volume is at its lowest setting.