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    GreekBrotha8's Avatar
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    D4 sub is reading 3 ohms each

    So I purchased a used alpine type x a while ago and put it in my girls truck for a few months and it sounds great. I took it out of her truck because i wanted to sell it, so i bought a cheapo dmm and checked the coils and they are reading about 2.9 each. Is this a problem? I know that they are hardly every exactly what they say but a whole ohm off seems like a lot. Don't wanna accidentally rip someone off lol.







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    Re: D4 sub is reading 3 ohms each

    Quote Originally Posted by GreekBrotha8 View Post
    So I purchased a used alpine type x a while ago and put it in my girls truck for a few months and it sounds great. I took it out of her truck because i wanted to sell it, so i bought a cheapo dmm and checked the coils and they are reading about 2.9 each. Is this a problem? I know that they are hardly every exactly what they say but a whole ohm off seems like a lot. Don't wanna accidentally rip someone off lol.
    as long as they two coils dont differ too much from each other i think you would be fine.



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    Re: D4 sub is reading 3 ohms each

    Nvm.

    You're good



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    Re: D4 sub is reading 3 ohms each

    Awesome. Thanks guys




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    Re: D4 sub is reading 3 ohms each

    how is this OK? A whole ohm is off.

    It will affect the amp. 4 coils paralleled into a monoblock would be .75ohms. That seems to be a big problem.




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    Re: D4 sub is reading 3 ohms each

    He only has 1 sub so he doesnt have 4 coils.
    Even if he had 2 subs then hed just have to find an amp stable down to .75 if thats how he chose to wire it.
    The dmm could be off a bit too. Touch the leads on the dmm together to see what it reads before trying it on the sub.



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    Re: D4 sub is reading 3 ohms each

    You're measuring dc resistance with the multimeter- not impedance. So 2.9 Ohms DCR suggests you're still in the 4 ohm impedance range.




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