most component sets are 4 ohms, but is that the tweeter/woofer together, or just the woofer? of so, then whats the normal for the woofer? the tweeter?

say, for instance, i wanted to wire 8 of them together, what options would i have? i'm shooting for a 1ohm load.(just an experiment, dont worry)

Depends on the speakers..... but usually the tweeter/woofer together is 4 ohm. Unless you buy something weird

Actually the woofer and the tweeter are usually 4 ohms each. The crossover splits it off though so the amp only sees a 4 ohm load and each component only gets half the wattage.

The 4 ohm impedance is just a reference. The actual impedance will change depending upon what frequency they're reproducing at the time.

The inductive reactance (think of it like resistance) is calculated by 2*pi*frequency*inductance
As the frequency goes up, the inductive reactance goes up, the overall impedance of the speaker(s) goes up.

A crossover adds additional inductive reactance in the circuit with the woofer to give it additional impedance at higher frequencies. It also puts a capacitor in the circuit with the tweeter. Capacitive reactance it just the opposite of inductive reactance. It's equation is 1/(2*pi*frequency*capacitance). Therefore in this circuit as frequency goes down the capacitive reactance goes up making overall impedance go up, limiting the current to the tweeters

The wattage isn't divided equally in the circuit unless it's at resonant frequency which is where capacitive reactance equals inductive reactance (Xl = Xc).

Resonant Frequency = 2*pi*frequency* sqrt(inductance * capacitance)


If you actually want the impedance of the woofer or tweeter alone, you'll have to find out the inductance value of the coil in the crossover or the capacitance value in the capacitor and use the equations to work backwards.




Easy, right?

Skyler Prahl wrote:Actually the woofer and the tweeter are usually 4 ohms each. The crossover splits it off though so the amp only sees a 4 ohm load and each component only gets half the wattage.

alright, so then with each set of speaker/tweeter/crosover combo i'm looking at 4ohm load. is there any way that you could get 8 of them to a 1 ohm load? i tried the wiring wizards but they only show of to 4 speakers..

basically me and my friend are making a wall of component speakers(its just a test, not to put in a car) and he's got an orion 1200D. with the 8 component sets we have(all the same brand), we wanna see how loud they can get. if i can get a 1 0hm load then i could push 150 to each speaker. i'm not sure its posible though...

8 pairs, or 4 pairs?

4 pairs, or 8 total would be a .5 ohm mono load with everything parralel

8 Pairs and you could run it at 1 ohm by doing 4 pairs at .5 and another 4 pairs at .5 and then wire those in series to make 1 ohm nominal.

but that orion is a class d amplifier so it isn't going to produce any sound about 250hz, are you just going to be using the woofers?

nah, woofers and tweeters. the whole component set. thats why i was asking is it was 4 ohms just woofers or woofers and tweeters. that might be a problem.

and its 4 pairs, 8 speakers. .5 load isnt what i was going for..