low pass filter circuit for subwoofer - Low Pass Filter Circuit for Subwoofer

Low Pass Filter Circuit for Subwoofer

The post explains a simple low pass filter circuit which can be used in conjunction with subwoofer amplifiers for acquiring extreme cuts or bass in the frequency range 30 and 200Hz, which is adjustable.


How the Circuit Works

Several low pass filter circuits for subwoofer application are presented all over the net however this one is an upgraded example.

The circuit provided here utilizes the high efficiency opamp TL062 from ST Micro electronics. TL062 is a twin high input impedance J-FET opamp exhibiting minimal power consumption and large slew rate.

The opamp possesses outstanding digital attributes as well as being exceptionally compatible with this circuit.

Between the two opamps inside TLC062, one is connected in form of the mixer with pre amplifier stage. The left/right channels are linked to the inverting input of IC1a for mixing.

The gain of first stage may be tweaked utilizing POT R3.The output of the 1st stage is hooked up to the input of next stage via the filter circuit containing parts R5,R6,R7,R8,C4 and C5.

The second opamp (IC1b) functions as a buffer as well as the filtered output can be obtained at the pin 7 of the TLC062.


low pass filter circuit for subwoofer 1 - Low Pass Filter Circuit for Subwoofer

13 thoughts on “Low Pass Filter Circuit for Subwoofer

  1. Have questions? Please feel free to post them through comments! Comments will be moderated and solved ASAP.
  2. I need ur help I build a metal detector. wit 555 and it work but my problem is I need d out to be either high or low state. I even couple d o/p to op-amp no response. but there is variation in d 555 o/p .what I don’t like is that the sound is on always… *irritating * .help me out o

  3. help me I want to make metal detector wit high sensitivity. ( that is when ever it detects metal an indicator will glow only.) thanks in advance

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