wiring three subs to mono amp..i need help?

tennsims17
tennsims17 Posts: 2
edited February 2008 in Basic Hookup/Wiring Questions
i have three 12" 400 watt rms kenwood subs, is it possible to wire it to my mono amp? and what amp would size amp would you reccomend?
Post edited by tennsims17 on
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    If they are 4 ohm subs, then wire all 3 in parallel to a 1 ohm stable(bridged) amp.

    Next time, more info would be appreciated. Are these dual voice coil subs?

    Check out jlaudio for a good tutorial on series/parallel wiring.
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    Shin, he could do something like this?

    2, 4ohm subs wired in sireis, with one parallel?
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    Nope; the power won't be shared equally by each speaker.

    The single speaker in parallel will be MUCH louder.

    The entire thing needs to be symmetric. This is misleading for me to say because your graph is a symmetric design in one plane.
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    ShinAce wrote: »
    Nope; the power won't be shared equally by each speaker.

    The single speaker in parallel will be MUCH louder.

    The entire thing needs to be symmetric.


    This kinda goes back to the thread we shared. Maybe a resitor in series and a shunt resistor, on the paralell driver, would help?

    Or run all in paralell 1ohm, then the reisistors?
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • Face
    Face Posts: 14,340
    edited January 2008
    That would be a mickey mouse job.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    Face wrote: »
    That would be a mickey mouse job.

    True, but it could be a cool subwoofer, crossover project. Able to handle 3, 4ohm drivers.
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    Because of the power involved, passive components will be costly.

    The best solution here is either to drop one sub and use 2. The other option is to find an amp that is 1 ohm stable bridged(common now with the class D series) and wire all subs in parallel to the same channel.
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  • tennsims17
    tennsims17 Posts: 2
    edited February 2008
    they are dual voice coil subs and i went ahead and bought a 1000 watt 1 ohm stable amp would this be fine for the subs
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  • ShinAce
    ShinAce Posts: 1,194
    edited February 2008
    The subs will need 2 ohm or 8 ohm voice coils.

    With 2 ohm coils, each sub will have its coils in series to make a single 4 ohm woofer. All 3 woofers are then connected in parallel, giving you 1.33 ohms, and netting lots of power from the amp.

    If they are 8 ohm coils, everything is in parallel, giving you the same 1.33 ohm load.

    If they are dual 4 ohm coils, you will need to follow the rule for 2 ohm coils and will end with 2.66 ohms presented to the amp.
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