This is the circuit diagram of power amplifier 45W using power uPC 1230 as the main component. The pre amp head has been added in the circuit using uPC 1032. This is an popular old circuit for hobbysts and the 45 Watt amplifier circuit should be working fine since the PCB already on the market few decades ago :). I don’t know weather the power IC is available or already discontinued.
Power Amplifier 45W Circuit Notes:
- The Cx part is 25pF, you can add this component to the circuit, but you can also not use it in the circuit.
- Use stabilized and regulated power supply to minimize the sound noise/buzz.
- The uPC 1230 power IC need proper heatsink to prevent overheat on the IC and keep good performance of the amplifier.
Circuit source: elektro-hoby.blogspot.com
A power audio amplifier is a specific type of power amplifier designed to amplify audio signals, such as those produced by musical instruments, audio sources like CD players or smartphones, or other audio devices. The primary purpose of a power audio amplifier is to increase the power of the low-level audio signal to a level that can drive speakers and produce sound at the desired volume.
Power audio amplifiers are commonly used in audio systems, including home stereo systems, professional audio setups, public address systems, and sound reinforcement systems. The amplifier’s role is to take the weak audio signal from the source and provide enough power to drive the speakers, allowing them to reproduce sound with sufficient volume and clarity.
Power audio amplifiers come in various classes, such as Class A, Class AB, and Class D, each with its own characteristics in terms of efficiency, heat dissipation, and distortion. The choice of amplifier class depends on the specific requirements and preferences of the audio system. Additionally, power audio amplifiers are rated in terms of their power output, measured in watts, and this rating helps determine the amplifier’s capability to drive speakers of different sizes and efficiency.