This speaker crossover calculator will help you design a speaker circuit that can produce amazing audio. It will tell you what capacitors and speakers you need to produce a certain crossover frequency and the other way around.
This crossover calculator can be used to:
- Calculate the crossover frequency of a certain circuit using a certain capacitance and with a speaker having a certain impedance.
- Calculate the required cap[iacitance to achieve a certain crossover frequency considering a speaker of a certain impedance.
Explanation of Terms
- C – is the capacitance value (in Farads). Please note that this is not the uF value seen on some capacitors. To convert to Farads, divide the value shown on the side of the cap in uF by one million.
- Rh – is the impedance of the load (speaker) you will be using. In other words, the resistance of the speaker.
- F – is the crossover frequency you will get.
Speaker Capacitance By Crossover Frequency
| Speaker Capacitance By Crossover Frequency | |||
| Crossover Frequency (Hertz) | Capacitance uF (microFarad) | ||
| 8 Ohms | 4 Ohms | 2 Ohms | |
| 80 | 248.44 | 496.88 | 993.75 |
| 100 | 198.75 | 397.50 | 795.00 |
| 120 | 165.63 | 331.25 | 662.50 |
| 150 | 132.50 | 265.00 | 530.00 |
| 200 | 99.38 | 198.75 | 397.50 |
| 280 | 70.98 | 141.96 | 283.93 |
| 400 | 49.69 | 99.38 | 198.75 |
| 600 | 33.13 | 66.25 | 132.50 |
| 800 | 24.84 | 49.69 | 99.38 |
| 1000 | 19.88 | 39.75 | 79.50 |
| 1200 | 16.56 | 33.13 | 66.25 |
| 2000 | 9.94 | 19.88 | 39.75 |
| 4000 | 4.97 | 9.94 | 19.88 |
| 5000 | 3.98 | 7.95 | 15.90 |
| 6000 | 3.31 | 6.63 | 13.25 |
| 8000 | 2.48 | 4.97 | 9.94 |
| 10000 | 1.99 | 3.98 | 7.95 |
| 12000 | 1.66 | 3.31 | 6.63 |
Speaker Crossover Frequency By Capacitance
| Speaker Crossover Frequency By Capacitance | |||
| Capacitance uF (microFarad) | Crossover Frequency (Hertz) approximate | ||
| 8 Ohms | 4 Ohms | 2 Ohms | |
| 2.2 | 9034 | 18068 | 36136 |
| 3.3 | 6023 | 12045 | 24091 |
| 4.7 | 4229 | 8457 | 16915 |
| 6.8 | 2923 | 5846 | 11691 |
| 10.0 | 1988 | 3975 | 7950 |
| 22 | 903 | 1807 | 3614 |
| 50 | 398 | 795 | 1590 |
| 100 | 199 | 398 | 795 |
| 200 | 99 | 199 | 398 |
Calculate for any Value
To use this calculator, enter the amount of capacitance you have available in the first box. Then enter the impedance of the speaker you will be using with this filter in the second box.
Finally, click the “Calculate It” button to see the frequency this filter will be -3 dB.
Rh = Ohms
Answer = Hertz
Capacitors in Series/Parallel
To use this calculator, enter the amount of capacitance in the first two boxes, they can be different values – this is how you obtain the odd values in the charts above.
Then pick a series or a parallel connection. Now, click the “Capacitance” button to see the final resulting value.
Capacitor 2 = uF
ParallelSeries
Answer = uF