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Thread: how to tell if your sub is 2 ohm or 4 ohm

  1. #1
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    how to tell if your sub is 2 ohm or 4 ohm

    i admit im new to this. i bought 2 12" alpine r series subs a couple of years ago at a sound sensation in auburn. thye installed them in a carpet box and in my jeep. totaled my jeep 2 weeks later and removed them. stil havent got a car worthy enough to put them in. theyve ben sitting in my house unused since. im trying to sell them now and i dont knw if they are 2 ohm or 4 ohm. i have the original application guide but there are no model numbers on the sub itself or the box. can anyone help me out? its either swr-1221d for 2 ohm or swr-1241 d for 4 ohm, but i dont know what i have ? any help would be great . thanks

  2. #2
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    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

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  3. #3
    Vendor - Qube colin's Avatar
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    Oh that's just cold.

    Real answer: Use a multimeter.

  4. #4
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    Secondly, the alpine type r subs are available in either dual 4 ohm voice coil or dual 2 ohm voice coil. I would say if you had a meter you could test the impedance from the terminals on the box. But since its dvc subs, the readings on the meter could still mean either 2 ohm or 4 ohm dual voice coil.. If using both voice coils on the 4 ohm model, you can get either 2 or 8 ohms. With the 2 ohm model, you get either 1 or 4 ohms. But if you only use one coil, you get 2 or 4 ohms depending on the model.
    So given this information, the only real way to get the information you require, you will need to remove the subs from the box and get the info from there.
    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

    PROGRESS:
    [-------90%-] (New Car=New Build)

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