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    neonrt's Avatar
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    Space behind magnet question.

    i know its been asked time and time again, but i could not get an answer from searching, just alot of non related stuff. Just need to know if 2" behind the pole vent on a sub will be enough in a sealed box. sub is an fi-q 15"







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    Re: Space behind magnet question.

    That should be enough.



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    Re: Space behind magnet question.

    I usually go by the radius of the pole vent (if it has one), try and keep at least that distance away from a surface.



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    PV Audio's Avatar
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    Re: Space behind magnet question.

    According to Dickason, you want at least 3" for a speaker, which is nowhere near the pole vent size of a subwoofer.




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    Re: Space behind magnet question.

    Quote Originally Posted by PV Audio View Post
    According to Dickason, you want at least 3" for a speaker, which is nowhere near the pole vent size of a subwoofer.
    What was his rationale for that?



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    Re: Space behind magnet question.

    3"? JL States all it needs is 3/4 of an inch at the least




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    Re: Space behind magnet question.

    The minimum is usually the diameter of the pole vent. The reason being that the vent can be restricted for 1) optimum cooling of the motor and 2) restricting air flow through the pole vent will alter the sub's T/S parameters.



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    MikeyB's Avatar
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    Re: Space behind magnet question.

    Quote Originally Posted by helotaxi View Post
    The minimum is usually the diameter of the pole vent. The reason being that the vent can be restricted for 1) optimum cooling of the motor and 2) restricting air flow through the pole vent will alter the sub's T/S parameters.
    x2, thats the rule I have always followed and I have never had a problem



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    Re: Space behind magnet question.

    Quote Originally Posted by lil azn 06 View Post
    3"? JL States all it needs is 3/4 of an inch at the least
    JL is a slanderous *****!



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    Re: Space behind magnet question.

    Quote Originally Posted by helotaxi View Post
    What was his rationale for that?
    To be quite honest, I didn't understand it at all. It's in the 6th ed. of the LDC. The book still still WAAAY over my head, so I couldn't even argue the point if I tried




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