Tweeter Crossover circuit

admin November 9, 2018 17 Comments

In this guide, we’re building a fun project (well, ‘tweet’ generating circuit is obviously fun to build, but tweet crossover reduction is purely geeky!)  – which is a Tweeter Crossover Circuit. This simple design is developed using two capacitors and a potentiometer. Very easy to build and you gain lots of concepts in crossover reduction principles.


A single coil speaker is not good in handling high and low frequency at the same time. If we could filter out the low frequency and play it through a tweeter ,it will produce more sound quality than using a single speaker.This is what is realized here.Here the high frequencies are filtered out using a low pass filter made of C1,C2 and R1 and send to the tweeter.The low frequency is only fed to the woofer.

Crossover Circuit Diagram with Parts List

Speaker Crossover Circuit

Tweeter Crossover Circuit Diagram


  • The tweeter can be a 2 to 3 inch, 4 to 8 Ohm one .
  • R1 is used to adjust match the the tweeters output level to that of woofer.
  • C1 and C2 are electrolytic capacitors.
  • R1 should be rated more than 2 Watts.

We have more interesting Audio Circuits in our website, which you would like to look:

1. Mini Amplifier Circuit

2. Hi Fi Amplifier Circuit

3. 150 Watt Amplifier

4. Audio Level Meter

5.  3 Watt Stereo Amplifier

  • November 23, 2014

    Well Circuit.Can I use 50V capacitor?

  • lcd950
    January 27, 2014

    Can I use speaker for this circuit?

  • nick ryan
    December 27, 2012

    Hi there is an error, you say ” if we could filter out the low frequency and play it through a tweeter” When I think you meant to type ” If we could filter out the high frequency and play it through a tweeter”

    regards, Nick

    • Jackson
      June 13, 2015

      I’m pretty sure he means filter the low frequency out from the audio, then pass just the high into the tweeter.

  • seetharaman
    October 21, 2011

    Hi Paul if you are using a passive network with good quality matching tweeter then just connect 2.2 uF non polar capacitor with 25 ohms wire wounnd 5 watt pot in series with one of the leads connecting tweeter, for 8 ohms tweeter. for 4 ohms increase capacitor to 4.7uF non polar say 100volt in both the cases.

  • PAUL
    October 20, 2011

    how can make a tweeter control if my amplifier is 400w?

  • Seetharaman
    April 15, 2011

    Hi DAVE C yes both the speakers should be in phase. Normally red dot will be indicated for the speakers. if not available connect a 1.5 volt torch cell and check the movement of the cone paper if it is moving out then the terminal to which you have connected the cell’s positive terminal should be marked as + or red dot. This way you check the speakers and mark the polarity.

  • Peter libbarth
    April 14, 2011

    your circuits grade me up,I’am an electronic hobbyist,
    I do autodidactic study on electonic and energy.

  • Peter
    November 8, 2010

    I’m a complete noob but isn’t R1 shorting the circuit?

  • Dave C
    February 17, 2009

    What is the polarity on the speakers here? Or does it not matter?

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