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I'm building these speakers and its a three way crossover and as I;m wiring them parallel they are much less (2.6) than the 8 ohm impedance. should I add a 5 ohm resister in series???
Follow Ups:
If you are using an ohm meter, you are measuring RESISTANCE not impedance. Read up on AC and DC circuit theory.
Knew I was doing something wrong
That doesn't change the fact that 2.6 ohms DC is much too low for a speaker with a nominal impedance of 8 ohms. He can still troubleshoot this problem with an ohmmeter.
"That doesn't change the fact that 2.6 ohms DC is much too low for a speaker with a nominal impedance of 8 ohms."
We have no way to know what exactly he was measuring since a schematic wasn't provided. Since we don't know what he was measuring, I would consider it imprudent to assume anything.
"He can still troubleshoot this problem with an ohmmeter."
One would be disposed to believe that was true.
It sounds as if you are paralleling two 4 ohm drivers.Had you tried putting them in series?
Most 8 ohm drivers fall between 6.5-7 ohms and half that figure on 4 ohm drivers.
Series the drivers.
Tom:cat
No.
Are you measuring just the three speakers in parallel? That's not how they should be connected to the crossover. Example:
yes that gif is exactly how they are wired. Its just when I read the output from my multi meter I didn't get 8 ohms so after reading various pages and remaining confused I came here. I'm probably using the meter wrongly.
Is this a published design? It would be helpful to see a schematic. Are you sure your meter is accurate? If you have a low-value resistor (10 ohms or so) you could check the meter against it. Is the speaker completely wired? If you disconnect the woofer and measure the input terminals of the crossover, it should measure open, that is, infinite ohms. If not, the crossover is miswired, or it's a series crossover, which is a whole other beast.
Edits: 07/23/15
I just looked this up. You can measure only DC resistance with an typical Ohm meter that you are probably using. It should read about 6.4 ohms, or 80% of 8 ohms, for a 'nominal' 8 ohm loudspeaker. You, evidently, don't have a 'nominal' 8 ohm loudspeaker. Your reading seems too low, for even a 'nominal' 4 ohm loudspeaker. That's all I know about loudspeakers. Better post under the Speakers topic for a more informed viewpoint.
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