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    adjetta's Avatar
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    free air? what other choice do I have

    I am installing an 8" infinity subwoofer in the place of the factory bose 8 that came in my 02 infiniti I35, and I do not know if free air will do the job. is free air going to be all that terrible?



    Ride: 2002 Infiniti I35
    HU: Pioneer PRS-80 w/ a JL Audio Linedriver
    Front Stage: Infinity ,Infinity KAPPA 6.09cs (front doors, rears need replacement)
    Sub Stage: Sundown Audio Z.V4 18"
    Front Amp: Soundqubed 120.4
    Sub Amp: Soundqubed 2200.1
    Power: Mechman 270A alt, Diehard advanced gold agm (775 CCA, 55ah) XS Power D3100, and something like 40' of stinger pro series zero gauge throughout




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    Falcons's Avatar
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    Re: free air? what other choice do I have

    in for this answer as well. you could always fiberglass a box onto your rear deck. thats what im thinking about doing



    Things to look forward to:
    (2) 10" or 12" imperium audio designs subs
    set of PHD MF 6.5" comps
    Completely seal off and deaden my doors
    aquire a 2k amp
    aquire a 2 channel amp for front stage

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    mklett33's Avatar
    mklett33 is offline Mark -CarAudioFabrication



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    Re: free air? what other choice do I have

    Quote Originally Posted by adjetta View Post
    I am installing an 8" infinity subwoofer in the place of the factory bose 8 that came in my 02 infiniti I35, and I do not know if free air will do the job. is free air going to be all that terrible?
    So do you mean that it would be installed in the rear deck much like a rear speaker. If so you are refering to somewhat of an "infinite baffle" enclosure. The trunk acts as the enclosure.

    How much power are you feeding it? Are you just hooking it to the factory wiring? My guess is you will be much more satisfied with giving it its own enclosure.



    -Mark @caraudiofab

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    keep_hope_alive's Avatar
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    Re: free air? what other choice do I have

    depends on many factors. i love running the Ultra Subs A-12 in a free air setup - but i built a reinforced wall for that purpose. the main issue with just bolting to a flimsy rear deck is the deck itself will move, and not as one but with modes and nodes (like waves in a tub). if you stiffen, and seal the rear deck - it will produce more bass than the stock sub ------ as long as you have a dedicated amp for it. if you just want to use the Bose amp then forget about it.



    have you been helped by me? i'd love to know. shoot me a PM.

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    Re: free air? what other choice do I have

    Quote Originally Posted by keep_hope_alive View Post
    depends on many factors. i love running the Ultra Subs A-12 in a free air setup - but i built a reinforced wall for that purpose. the main issue with just bolting to a flimsy rear deck is the deck itself will move, and not as one but with modes and nodes (like waves in a tub). if you stiffen, and seal the rear deck - it will produce more bass than the stock sub ------ as long as you have a dedicated amp for it. if you just want to use the Bose amp then forget about it.

    The easiest route imo is building a box. Strengthening the deck correctly is much more effort than making an enclosure.



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    keep_hope_alive's Avatar
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    Re: free air? what other choice do I have

    Quote Originally Posted by mklett33 View Post
    The easiest route imo is building a box. Strengthening the deck correctly is much more effort than making an enclosure.
    agreed. easily 40-60 hours of effort making free-air work really well.



    have you been helped by me? i'd love to know. shoot me a PM.

    My 2014 Accord build log: http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/608637-2014-accord-sport-sq-build-keep_hope_alive.html
    ***My YouTube Channel https://www.youtube.com/channel/UCkYUo2EShW9lgtrfXiDvLNQ/videos
    *My 2001 Accord build log: http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/536049-2001-accord-ex-sedan-its-long.html
    *2005 Scion tC Build Log: http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/516096-2005-scion-tc-sq-hertz-audison-pioneer-build-log.html

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    Re: free air? what other choice do I have

    Quote Originally Posted by keep_hope_alive View Post
    agreed. easily 40-60 hours of effort making free-air work really well.
    And even then not the same results.



    -Mark @caraudiofab

    http://www.youtube.com/caraudiofabrication
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    Re: free air? what other choice do I have

    It can work as long as you know the results you are going to get. My dad had the same car and his sub died and I have seen others replaced. He used the factory spot and went with a different free air sub and a small amp. He also was not trying to set an SPL record and just wanted fill. Throw a little bit of deadner on the deck and dont try to overpower the sub.




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    Re: free air? what other choice do I have

    It's the sub is made for free air then it will be okay. I've see people do Rockford fosgate free air in rear decks with the trunk as a box




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