Bass filter circuit diagram subwoofer preamplifier

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Bass filter circuit diagram, subwoofer preamplifier with volume control. This is a bass filter include PCB, using the Op Amp Ne5532 or another of your choice. The circuit is simple to set up and already has symmetrical power supply, the transformer must use 9-12 volts / 500ma with center tap … In numerous application, the power supply can be made by the power amplifier … Just watch out for the limit supported by the voltage regulators.

The circuit has two pots, one for volume adjustment and another to adjust the filter cutoff frequency of 50 to 150Hz, if you need to install the pots in a panel, use shielded wires to make connections.

About the Bass filter circuit diagram subwoofer preamplifier

We use 2 operational amplifier integrated circuit, IC1A is configured as an inverting amplifier and gain of 13.6, if you need to change this just change R4. C11/R3 is a high pass RC filter with cutoff frequency at 15.91Hz and IC₂A is a high pass filter with cutoff frequency at 28Hz.

IC₂B is a low-pass filter with cutoff frequency adjustable from 28 to 234 Hz and IC1B is a low-pass filter with cutoff frequency at 234Hz. P1 adjusts the cutoff frequency and P2 adjusts the volume.

The scheme also features the power supply circuit using 7812 and 7912 voltage regulators.

To use, the filter still requires a power amplifier, so it can drive a subwoofer type speaker.

If you want to change the parameters of this circuit, see here on this site the calculators ⇒ http://sim.okawa-denshi.jp/en/Fkeisan.htm

Schematic Bass filter circuit diagram subwoofer preamplifier

Ne5532 Bass, Subwoofer Filter Schematic Bass Filter Circuit Diagram Subwoofer Preamplifier

Printed Circuit Board PCB for mounting Bass filter circuit diagram subwoofer preamplifier

Ne5532 Bass, Subwoofer Filter Pcb Ne5532 Bass, Subwoofer Filter Bass Filter Circuit Diagram Subwoofer Preamplifier
Ne5532 Bass Filter For Subwoofer Pcb Component View Ne5532 Bass, Subwoofer Filter Bass Filter Circuit Diagram Subwoofer Preamplifier
Ne5532 Bass Filter For Subwoofer Pcb Component Silk Ne5532 Bass, Subwoofer Filter Bass Filter Circuit Diagram Subwoofer Preamplifier

BOM Subwoofer bass filter circuit assembly

Last update: 10/16/2022 20:19

Part Value Description Quantity
Capacitors
C1, C2 2200uF/25V Electrolytic capacitor 2
C3, C4, C5, C6, C7, C8, C9, C10 100n Polyester capacitor 8
C11 1uF Polyester capacitor 1
C12, C13 100uf/25V Electrolytic capacitor 2
Semiconductors
LED1 Led 3 mm Led Color of your choice 1
IC1, IC2 NE5532N, TL072 or equivalent Operational amplifier 2
B1 KBP307 or equivalent. Bridge rectifier 1
IC3 LM7812 12V positive voltage regulator 1
IC4 LM7912 Negative voltage regulator -12V 1
P1, P2 50k Double potentiometer 2
Resistors 1/4W
R1, R2 56K Green, blue, orange, gold 2
R3, R5, R6 10K Brown, black, orange, gold 3
R4 68K Blue, gray, orange, gold 1
R7, R8, R9, R10 6.8k Blue, gray, red, gold 4
R11 4.7K Yellow, Violet, Red, Gold 1
Miscellaneous
CN1 (IN) Audio Input Terminal block 2 pin 5.08 mm 1
CN2 (SUB) Audio output for subwoofer Terminal block 2 pin 5.08 mm 1
CN3 (AC) Power Supply (Transformer) Terminal block 2 pin 5.08 mm 1
Solder, Wires, PCB, Knob for the potentiometers, box, 9 to 15 Volt transformer /250mA, etc.

Download files for mounting the bass filter, including PCB in PDF, PNG, PS and Gerber

Printed circuit board now updated with Gerber added.

Download PDF     Mirror

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47 thoughts on “Bass filter circuit diagram subwoofer preamplifier”

  1. hi, don’t panic just remove the ac to dc converter part and connect pin 8 to postive and 4 to negative
    terminal of the battery

    Reply
  2. A little correction needed in semiconductor parts list.
    Kindly ammend these 7812 is a +12Vdc regulator & 7912 is a -12Vdc regulator IC.
    Circuit is perfect & working very well.
    Thanks to Mr Toni for giving us such a nice n excellent performing circuit.
    Regards Kashif.

    Reply
  3. How can i use this filter in my car because the problem is power supply the car battery have only 12v and gnd not a 12-0-12 plzz help me sir plz plz

    Reply
  4. firstly i said-english is not my native language.ok
    i made this…
    good…nice working..i like it.
    thank you toni…
    Can you give me a 5.1 surround soud decoder circuit.,please…
    (send it to my email)

    Reply
  5. the signal on the 5th pin is ok but the o/p of the 7th pin of op amp is showing heavy noise i tried NE5532 p and LM833an but both shows this noise…how it can be corrected? siganl fed was from the signal geanerator not the real audio.

    Reply
  6. Solder, wire, PCI, Knob for pots, box, transformer 9-12 Volts / 500mA, etc..

    Is 12v is the vct of the transformer??
    or 12-0-12 ?(ie vct =24v).

    Reply
  7. This is the best one I’ve ever used. Thank u so much. Could u please do me a favour. Can u design a 5.1 channel good quality filter, so that i can use that wit one of ur best power amplifiers

    Reply

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