120 Watt Audio Power Amplifier Circuit

Description: Amplifier with IC number TDA7293 for processing sound systems. This amplifier includes inputs for a radio, TV, stereo, or other line-level devices. It also features a phono input for a record player, guitar, microphone, or other unamplified sources. With the addition of a low-pass filter at the input, it serves as an excellent amplifier for a small subwoofer.

The TDA7293 is a high-performance audio amplifier IC designed for various sound amplification applications. It operates in a class AB configuration, providing a balance between efficiency and audio quality. The amplifier can deliver a substantial output power, typically around 100W into a load of 4 ohms, making it suitable for driving speakers in home audio systems.

The amplifier's design includes multiple input options, allowing versatility in connecting different audio sources. The line-level inputs are designed to handle signals from devices such as radios, televisions, and stereo systems, ensuring compatibility with a wide range of consumer electronics. The dedicated phono input is optimized for low-level signals from turntables and microphones, which require a higher gain to achieve standard output levels.

For applications requiring enhanced bass response, the inclusion of a low-pass filter at the input stage is recommended. This filter effectively allows only the lower frequency signals to pass through, making the amplifier particularly effective for subwoofer applications. The filter can be implemented using passive components such as resistors and capacitors, tailored to the desired cutoff frequency, thereby enhancing the overall performance of the sound system.

In terms of power supply requirements, the TDA7293 typically operates with a dual power supply, providing both positive and negative voltages. This configuration is essential for class AB amplifiers to achieve linear operation across the audio spectrum. Proper heat dissipation must also be considered, as the amplifier can generate significant heat during operation. Adequate heatsinking and thermal management strategies should be employed to maintain optimal performance and prevent thermal shutdown.

Overall, the TDA7293 amplifier is a robust solution for audio amplification needs, offering flexibility in input options and the ability to drive various types of speakers, including subwoofers, ensuring high-quality sound reproduction across different audio formats.Amplifer with IC number TDA7293 for process sound system. This amplifer was have the input for a radio, TV, stereo or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low pass filter at the input, it makes a great amp for a small subwoofer.