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Thread: amp wiring

  
  1. #1
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    Amrik's Avatar
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    amp wiring

    i have an alpine t407 currently running 2 jl 12w0 subs, 4ohms. they are wired one to each channel so currently each channel is running at 4 ohms.
    i have another sub at home, the same, and i want to wire that in too.

    so could i wire two of them off one channel, ie at 2 ohms and the third one off the other channel at 4 ohms??
    Ex Astra Coupe Driver
    Now: Audi A4 Cabriolet

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    A5TRA 59ORT's Avatar
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    you have got a couple of options

    1. Two subs to one channel and 1 to the other. if your amp is stable at 2ohms you can wire the two up in parallel if not yiou will have to wire them up in series

    2. bridge the amp and run all 3 from the bridged channel there is a down side to this though and that is unless your amp is stable down to 1ohm when bridged which i don't think it will be then you will need to run all three in series producing a load of 12ohm which will limit the power your amp can drive

    TBH though if i was you i would get another amp to run the thrid sub

    or a class D mono amp which is 1ohm stable and run all three from that then you will have an amp spare to amp your front components

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    I could be wrong....but

    Your subs are 4 ohm rated....in the manual it says:
    "To obtain a 4Ω mono load using three 12ΩWØ’s
    you must wire all three subwoofers in parallel."

    I think they're Single Voice Coil subs.
    In which case, your better of bridging your amp to give you 200w @ 4ohms.
    Then wiring as per diagram:

    3 SVC drivers with Voice Coils in Parallel


    Also here clicky

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    Coo that will produce a load off 1.333Ohm

    to calculate the combined resistance of parrel resistances use the following formula

    1/Rtot = 1/R1 + 1/R2 + 1/R3

    1/Rtot = 1/4 + 1/4 + 1/4

    1/Rtot = 0.75

    therefore

    Rtot = 1/0.75 = 1.333

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    I tried !

    Sub manual PDF: Clicky

    T407 Amp manual PDF: Clicky

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    1. Two subs to one channel and 1 to the other. if your amp is stable at 2ohms you can wire the two up in parallel if not yiou will have to wire them up in series
    this is what i was thinking
    Ex Astra Coupe Driver
    Now: Audi A4 Cabriolet

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    PeterPiper's Avatar
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    How about sell the old W0s and get a W3 or W6 or something, 125Wrms isnt exactly mind blowing is it!
    Any info on V6 MK4 conversions greatly appreciated!
    ----x--Petey--x----

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