In the previous post, I published Improving performance Bass Amplifier, the bass booster using IC Op-Amp using or based on IC JRC4558, LF353, TL072, TL082.
Turbo Bass with IC LM324 Circuit Diagram
PCB Layout Turbo Bass with IC LM324
See also this PCB Design Video:
The Circuit above need 12Volt - 15 Volt DC symmetrical voltage power supply, and also using regulated and stable power supply to more get high-quality audio output power amplifier. It,s simple and more useful for boosting your bass tone. If you have any question, please place your comment below.