Do it by self with wiring diagram: simple 741 pre ampli circuit 741 pre circuit control tone ic preamp preamplifier using opamp ampli simple audio amplifier diagram schematic circuits single schematics devreler
Low noise pre tone control circuit using 4558 - NE55532
![Low noise pre tone control circuit using 4558 - NE55532](https://i2.wp.com/www.eleccircuit.com/wp-content/uploads/2017/08/circuit-diagram-of-the-low-noise-pre-tone-ne55532.jpg)