Saturday, November 05, 2016

Complete Subwoofer Filter Circuit TL072

Here is my experience in designing and building a subwoofer. And I share my other project subwoofer filter but using IC 4558, Subwoofer Module 4558.
in this subwoofer filter, first at important parts is the active circuit filter 40 Hz, 12dB / Octave slope with a dual-ic opamp TL072 and several other passive components. The circuit details are as follows:

Complete Subwoofer Filter Circuit TL072

 The subwoofer filter frequency response is as follows:

subwoofer filter frequency

The PCB design and its layout:

pcb design and its layout

Electronic Circuit is a good site for hobbyist also who would like to try DIY because it shared good circuits. If you have a personalized circuit requirement you may feel free to request it through the comment box or contact me.


Hi. Nice job here Wahyu with all your posts. Do you have an active High Pass and Low Pass filter for a 2.1 system?


Hello andrian.

Do you search for 2.1 speaker system? You can find here about low and high pass filter. You can combine it into your 1 amplifier for subwoofer and 2 amplifier circuit for mid and high tone.

Hi, I'd like to use this circuit, but with a 60Hz cut-off frequency. Could you tell me which components I'd need to change to do so? The 33K resistors and the 100microF cap?

100 microF its so bigger. Change with 50uF it can. The resistor for gaining the bass.

Hi, I cannot receive output signal, but if I remove the 33k input resistor or remove the 1uf output capacitor,I can receive broken signal. What is your suggestions?