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Speaker wiring

Alex Ayris

Apr 22, 2016
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Apr 22, 2016
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Not sure if this is possible or not, I want to wire a set of 2 4 Ohm speakers in parallel to an 8ohm speaker in series to get a total resistance of 4 ohm. I don't see it being a problem.
 

duke37

Jan 9, 2011
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Two 4Ω speakers in parallel equals 2Ω. Add 8Ω in series gives 10Ω.

Two 4Ω speakers in series equals 8Ω. Add 8Ω in parallel gives 4Ω. This may or may not give the balance you require.

In pactise, the speaker impedance varies all over the shop and depends on the the speaker mechanics and the enclosure design.
 

Alex Ayris

Apr 22, 2016
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Yeah sorry my dyslexia kicking in. 4 ohm impedance is what I'm after I was just unsure if it was OK to mix and match different ohm ratings when doing a series / parallel circuit.
 

dorke

Jun 20, 2015
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Yeah sorry my dyslexia kicking in. 4 ohm impedance is what I'm after I was just unsure if it was OK to mix and match different ohm ratings when doing a series / parallel circuit.
It is ok to mix, but take care that you don't drive the speakers above there rated RMS wattage.
What are the power ratings of the different speakers ,what are their sizes and frequency ranges ?
 

Alex Ayris

Apr 22, 2016
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What I'm doing is turning an old LG surround system into a stereo. The 4 satellite speakers are 140w 4Ohm speakers but the centre speaker is made up of 2 8 Ohm speakers wired in parallel to give 4 Ohms but combined rated at 140w. I have a 2 channel receiver rated at 4 Ohm 100 watts per channel and I want to put 3 speakers on each channel
 

dorke

Jun 20, 2015
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Are all satellite speakers the same physical size?
If there are, you can combine them any way you like.

The center speakers are different ,therefore combining them would require a cross-over .
 

Alex Ayris

Apr 22, 2016
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Apr 22, 2016
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Yeah the satellites are all the same speaker. The centre speaker is also the same speaker spec just 8 Ohms each instead of 4 Ohms. And slightly different db rating. All speakers are full range. I am also running a separate amp for the sub. The receiver is actually a 4 channel 100 watts per channel. And I could just drop the centre speakers and have the 4 satellites 1 on each channel but doing some test it sounded better with them added.
 
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