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Speaker wiring

Discussion in 'General Electronics Discussion' started by Alex Ayris, Apr 22, 2016.

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  1. Alex Ayris

    Alex Ayris

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    Apr 22, 2016
    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.
     
  2. duke37

    duke37

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    Jan 9, 2011
    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.
     
  3. Alex Ayris

    Alex Ayris

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    Apr 22, 2016
    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.
     
  4. dorke

    dorke

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    Jun 20, 2015
    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 ?
     
  5. Alex Ayris

    Alex Ayris

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    Apr 22, 2016
    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
     
  6. dorke

    dorke

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    Jun 20, 2015
    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 .
     
  7. Alex Ayris

    Alex Ayris

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    0
    Apr 22, 2016
    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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