Audio Amplifier Diagram

The circuit is based on four integrated circuits: TL072, TL074, MN3101, and MN3004, which produce four output channels for surround audio, specifically targeting center, rear, front right, and front left audio. It is a compact amplifier capable of delivering 7W at 4 Ohms. Despite its modest output power, this circuit is designed to achieve low total harmonic distortion and cross-talk. The design consists of two identical mono amplifiers, each with its own power supply. This Class A audio amplifier operates at 50V and can produce high sound levels. Additionally, the circuit includes a small and straightforward audio amplifier utilizing the TDA7294 chip. Two TDA7294 chips are employed for stereo operation (providing 2G—80 watts) and in bridge mode for increased output (up to 180 watts).

The described circuit configuration utilizes four key integrated circuits, TL072, TL074, MN3101, and MN3004, which are essential for generating a multi-channel audio output. The TL072 and TL074 are low-noise operational amplifiers, ideal for audio applications due to their high slew rate and low distortion characteristics. The MN3101 and MN3004 are more specialized chips used in audio processing, allowing for effects such as echo and reverb, enhancing the overall listening experience in a surround sound setup.

The amplifier section is designed to deliver 7W at a load of 4 Ohms, which is suitable for driving small speakers in a compact audio system. The low total harmonic distortion (THD) and minimal cross-talk between channels ensure that the audio signal remains clear and faithful to the original source material. This characteristic is particularly important in surround sound setups, where clarity in each channel contributes significantly to the immersive experience.

The circuit is structured around two identical mono amplifiers, each powered by its dedicated power supply. This design choice not only provides isolation between channels, reducing interference, but also allows for more consistent performance under varying load conditions. Operating at 50V, this Class A amplifier is capable of producing high sound levels, making it suitable for applications where loud audio output is required without compromising sound quality.

In addition to the four-channel output configuration, the circuit also integrates a TDA7294-based amplifier. The TDA7294 is a versatile audio amplifier IC known for its efficiency and power output capabilities. When configured in stereo mode, two TDA7294 chips can deliver up to 80 watts, while utilizing bridge mode can increase the output power to 180 watts, making it suitable for driving larger speakers or for use in more demanding audio applications.

Overall, this circuit design combines advanced audio processing capabilities with robust amplification, making it an ideal solution for compact surround sound systems and high-fidelity audio applications. The careful selection of components and thoughtful circuit design ensure that the final output is both powerful and high-quality, meeting the needs of audio enthusiasts and professionals alike.Based on four chips, TL072, TL074, MN3101, and MN3004 which produce four channels of output, the center, rear, front right, and front left surround audio accomm. [read more] Very small amplifier witch can provide 7W/4Ohm output. This circuit, although have small output, but capable to produce output with low total harmonic and cross.

[read more] C omposed of two similar mono amplifier. Each channels has its own power supply. This class A audio amplifier take 50V as the fuel, and will produce very loud so. [read more] This is a small and simple audio amplifier with TDA7294. Using 2 TDA7294 for stereo (2G—80 watt) mode and bridge mode (180 watt). The TDA7294 for use as cla. [read more] 🔗 External reference