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Old 6th January 2003, 04:39 PM   #1
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Question Ohm's on amp?

Ok another question

While i was viewingthis project i noticed that the tweeter was 6ohm and the woofer/mid was 8ohm. What would this equal to in total for the amp? would the spakers be 8ohm or 6 ohm?

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Old 6th January 2003, 04:46 PM   #2
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err..
A combination of the two.

Low frequency will see 8 ohm but high frequency will see 6 ohm. Generally all amp will be able to drive 6 ohm to full power.
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Old 6th January 2003, 07:52 PM   #3
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Default Ohms?

Scribble,

If you look at the xover, which is a series one, you will note that at low freq, the coil will have a low impedance and shunt the tweeter, so what the amp sees is the woofer + a small impedance of the coil//tweeter. At high freq, the cap is shorting, so the amp sees the tweeter + the small imp of the cap//woofer.
You really would need to do a simulation of this network or measure it to see the impedance change with freq. I didn't even mention that at resonance, weird things may happen.

Bottom line: probably somewhere between 6 and 8 Ohms, with some resonances to 20 or more Ohms. There may or may not be some freq where the imp drops below 4 Ohms. Also depends on the enclosure. No simple answer, I'm afraid. But you amp should be OK with this speaker.

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