Ujjdwiurgh Stereo Preamplifier Tone Board Bluetooth Speaker MP3 Audio Modification Control Panel Board DC9-29V Power Supply

It features wide voltage regulation and can operate within DC9-29V. This circuit uses three TI NE5532 operational amplifiers, with one stage for gain, one stage for buffering, and one stage for equalization processing. Reverse connection protection for positive and negative power supply poles is provided. It is equipped with a mute circuit for power on/off, which basically eliminates impact noise during power up and down. A built-in boost module can convert a single power supply into a ±14.5V dual power supply to power the circuit, offering a large sound dynamic range and strong driving force, capable of driving high-power rear stages. The output is designed with two impedance interfaces for easy connection to different power amplifiers.