![]() ![]() ![]() The schematic diagram is showing only one channel but the PCB layout was developed for 2 channels. This project uses 2 LME49720 op amps for both channels. In this project you can adjust the bass and treble frequencies simultaneously for both channels with the familiar cut-flat-boost positions of the controls. In my opinion, adding a tone control circuit into any audio system simply improves frequency response and provides more pleasing sound. The LME49720 combines extremely low voltage noise density with vanishing low THD+N (0.00003%) to easily satisfy the most demanding audio applications. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49720 audio operational amplifiers deliver superior audio signal amplification for outstanding audio performance. ![]() Here's a brief description of LME49720 from Texas Instruments: The LME49720 is part of the ultra-low distortion, low noise and high slew rate operational amplifier series optimized and fully specified for high performance, high fidelity applications. 2-Channel Tone Control Circuit based on LME49720 Dual High Performance and High Fidelity Audio Operational Amplifier ![]()
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