Ujjdwiurgh NE5532 Tone Board for HIFI Outdoor Speaker-3-Band Balanced(, Mid, Treble) Preamp with DC9-29V Single Power Supply

Reverse polarity protection for power supply; Wide voltage regulation, capable of operating between DC9-29V; Built in boost module It can convert a single power supply into a ± 14.5V dual power supply to power the circuit, with a large dynamic range of sound and strong thrust, which can drive high-power rear stages. Two impedance interfaces have been designed for the output, making it convenient to connect different power amplifiers This circuit uses TINE5532 three chips, with one level gain, one level buffer, and one level tone processing; Equipped with a power on/off silent circuit, there is basically no impact sound when turning on/off; The low impedance interface can be connected to a pure post amplifier, while the high impedance interface can be directly connected in parallel to the input end of a combined amplifier or other audio equipment line with a pre amplifier