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



  1. Pradip Adhikary

    Well Circuit.Can I use 50V capacitor?

  2. nick ryan

    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

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

  3. seetharaman

    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.

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

  5. Seetharaman

    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.

  6. Peter libbarth

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

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

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