amplifier tda2030-circuit based on lm1875, tda2040, can be used instead of the tda2030 tda2050 pcb design is quite small volume control potentiometer attached to power supply filter capacitor on the pcb can be used with different bass filter amplifier... Electronics Projects, Active Subwoofer Bass Filter Circuit TDA2030 Amplifer Project "audio amplifier circuits, ic amplifier, " Date 2019/08/02