If you use a 4 ohm high frequency driver with an 8 ohm crossover, the crossover point will double. If you use a 4 ohm woofer with an 8 ohm crossover, the crossover point will halve. The result of using 4 ohm components with a 2-way 8 ohm crossover will leave a hole in the response.
What should a 4 ohm speaker read?
For a 4 ohm speaker, it should read between 2 and 4 ohms on a meter. For a 8 ohm speaker, it should read between 4 and 8 ohms on a meter. For a 16 ohm speaker, it should read between 8 and 16 ohms on a meter.
What do resistors do in crossover?
In a crossover network, resistors are usually used in combination with other components to control either impedance magnitudes or the relative levels between different drivers in a system.
Does crossover affect impedance?
First, I’m going to give you the super-simplified version: the crossover has no effect on impedance. If you have two 8 ohm speakers, your combined (crossover + woofer + tweeter) is still an 8 ohm system.
How do I know how many ohms My speakers are?
The impedance of the speaker, measured in ohms, is typically listed on the back of the speaker. This value deals with an AC signal (alternating current), the electrical signal that causes a speaker to move. The ohm value, listed on the back of the speaker, is the nominal impedance.
Can I use an 8 ohm speaker with a 4 ohm crossover?
You can use an 8 ohm speaker with a 4 ohm crossover by connecting an 8 ohm resistor in parallel with it. The end result is 8 Ohms/2 = 4 ohms the crossover will see. You can use a 4 ohm speaker with an 8 ohm crossover by connecting it in series with a 4 ohm resistor. The end result will be 8 ohms total seen by the crossover.
How can I make a crossover work with a higher impedance speaker?
Case #2: speaker that has a higher impedance: You can add a resistor in parallel with the speaker to bring the total Ohms load down to what the crossover needs. You can use an 8 ohm speaker with a 4 ohm crossover by connecting an 8 ohm resistor in parallel with it. The end result is 8 Ohms/2 = 4 ohms the crossover will see.
Will a sub amp work with a 4 ohm subwoofer?
If the subwoofer is active then the sub amp will have to be stable into 4 ohms and you will need to change the woofer level. If the crossover is passive then when you insert the 4 ohm woofer it will play 3db louder than the 8 ohm woofer. The crossover frequency might change but the impedance that the amp sees will be lower than before.
What is the crossover frequency of 8 ohms?
As a general rule: Halving the speaker impedance (ex.: 8ohms to 4 ohms) doubles the crossover frequency (Ex.: 3.5kHz goes to 7kHz) Doubling the speaker impedance (ex: 8 ohms to 16 ohms) halves the crossover frequency (Ex. 3.5kHz goes to 1.75kHz)
