I've seen this question pop up a few times on here.
I have done a Forum search for it, but can't find it.
I wonder if anyone can help ?
I am trying to find out what these sums work out at.
I have even tried search engines ! Even Jeeves doesn't know!
8 Ohms + 8 Ohms = ???
8 Ohms + 4 Ohms = ???
4 Ohms + 4 Ohms = ???
Many Thanks For your help!
Nathan
Full Version: X OHMS + X OHMS = ??
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8ohms + 8ohms is 4ohms
8 ohms + 4ohms is about 2.7ohms
and
4ohms + 4 ohms is 2ohms
8 ohms + 4ohms is about 2.7ohms
and
4ohms + 4 ohms is 2ohms
THANK YOU VERY MUCH 
Sorry for all the Q's !!!
Nathan
Sorry for all the Q's !!!
Nathan
The above calculations apply if the items are wired in parallel. If they are connected in series then normal maths applies e.g 8 + 8 = 16
Paul
Paul
Remember that's only if you are wiring them in parallel, if you are wiring them in series simply add the resistances...
| QUOTE |
| Remember that's only if you are wiring them in parallel |
and so you should be when putting speakers on an amp
| QUOTE (DJ Marky Marc @ Dec 29 2005, 05:23 PM) |
| 8ohms + 8ohms is 4ohms 8 ohms + 4ohms is about 2.7ohms and 4ohms + 4 ohms is 2ohms |
As per.
The formula for parallel impedance is
1/r(tot) = 1/r1 + 1/r2 + 1/r3 etc
where r(tot) = total impedance
r1, r2 etc are the individual speaker impedances.
(Just in case you need to work out other values you've not mentioned yet!!)
1/r(tot) = 1/r1 + 1/r2 + 1/r3 etc
where r(tot) = total impedance
r1, r2 etc are the individual speaker impedances.
(Just in case you need to work out other values you've not mentioned yet!!)
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