Woofer La4508 Subwoofer Circuit Diagram. If subwoofer in your music system is not producing enough bass then you can use this simple diy circuit to enhance the bass. For this subwoofer booster enhancer circuit using voltage of 12 v 12v and ground.
Use a 100w 12 inch sub woofer at the output. Here we designed a sallen key low pass filter using opamp lm7332. This subwoofer amplifier circuit consists of a tl072 low noise jfet dual operational amplifier ic1 and two lm1875 ic2 and ic3 power amplifiers.
In front of each.
In front of each. The cut off frequency was assumed to be 200hz and the quality factor is assumed to be 0 707. In stereo mode each half of the tl072 operates as a non inverting input amplifier with a gain of about 2 8 times as determined by feedback resistors r5 and r6. The active subwoofer function to filtering bass tones low and add settings for low tones frequency ranging from 20hz up to 70hz on audio signal input output the settings contained in the pot stereo that you can see in the picture circuit schematic.
