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    KurtisLow's Avatar
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    2002 Ext. Cab Chevy (Avatar)

    I have 2 JL Audio 10W3V3s each in its own sealed enclosure made from 3/4" MDF and built to JL Audio's specs (18"Wx11"Hx9"D) *0.625cu. ft.* I was wondering how to mount the enclosure under the seat........Firing up into the bottom of the rear seat? Firing out from under seat towards the back of the front seats? Firing down into the floor? Any info will be GREATLY appreciated.



    Vehicle:
    2005 GMC Sierra SLT Crew Cab, 5.3L V8, 2" drop shackles, 2 Sony 6.5" 4-ways in each front door in a custom mount
    Upcoming Mods:
    Head Unit: Pioneer DEH-X9600bhs, Front Stage: Polk Audio DXi6501 Comps on a PPI BK340.2 amp, Rear Fill: Polk Audio DXi650 Coaxials, Subs: 2 Image Dynamics 10s on a JL Audio 500/1v2 amp in a SubThump enclosure, Electrical: Optima YellowTop with KnuKonceptz 1/0 Big 3 and amp kit




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    jdc753's Avatar
    jdc753 is offline Truck Brigade



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    Re: 2002 Ext. Cab Chevy (Avatar)

    I was workin on a project for my friends 05 chevy extended cab and looked like most were downfiring, with a couple being forward firing, not too many choose the up firing design. Personally I would probably put them downfiring.

    I just reread your message though, looks like you already have the enclosures built?? I forget the measurements but I think there was about 13" of room towards the front of the back seat but only about 8 or 9" towards the back. To downfire you would most likely need an inch or two between the sub and the floor, so it doesn't hit the floor when pounding, even even then I would worry about junk sliding under the sub and damagine it.

    I guess without building a new box I would just slide em under the seat as far as they will go and up fire them. You could always build your own box and still have about the same internal volume when all done, just gets tricky when doing it all out of MDF seeing the floor isn't symetrical and the back hump eats up a lot of room too.



    2005 F350 crew cab diesel 4x4
    -Work in Progress-
    HU: Alpine 9887 linked to 10.4" TS TruckPC
    Front Stage: Polk SR6500 Active
    Front Amp: Sundown Sax100.4
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    Sub amp: Sundown Saz-1500D

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  3. #3
    KurtisLow's Avatar
    KurtisLow is offline Grease Monkey

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    Re: 2002 Ext. Cab Chevy (Avatar)

    Yea I'm thinkin' about outfiring them right now. I'm scared of upfiring b/c i do ride around with a lot of friends on the weekends (backseat passengers) and i would hate for one of them to put too much pressure on the seat and damage the sub. I'm hopin' the outfire method will still sound ok....



    Vehicle:
    2005 GMC Sierra SLT Crew Cab, 5.3L V8, 2" drop shackles, 2 Sony 6.5" 4-ways in each front door in a custom mount
    Upcoming Mods:
    Head Unit: Pioneer DEH-X9600bhs, Front Stage: Polk Audio DXi6501 Comps on a PPI BK340.2 amp, Rear Fill: Polk Audio DXi650 Coaxials, Subs: 2 Image Dynamics 10s on a JL Audio 500/1v2 amp in a SubThump enclosure, Electrical: Optima YellowTop with KnuKonceptz 1/0 Big 3 and amp kit

  4. #4
    ProgMtl's Avatar
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    Re: 2002 Ext. Cab Chevy (Avatar)

    Downfiring will sound the best...tried every direction in my 2001 xcab



    System:
    Kenwood KDC-X991 (w/KCA-iP200)
    Sundown SAZ-1500D - Sundown SAX-100.4
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    Wheatley custom tune - Magnaflow exhaust & cats
    SB Filters air intake - 260amp Iraggi alternator

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    Bought From: djdilliodon, denim

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    Joseph K's Avatar
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    Re: 2002 Ext. Cab Chevy (Avatar)

    Downfire sounded the best in my truck (I took out the rear seat now and built a big box)... pretty much everyone chooses downfire on underseat boxes on the chevrolet/gm truck forums I'm on as well.




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    fshanda's Avatar
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    Re: 2002 Ext. Cab Chevy (Avatar)

    Heres what I came up with. No room to down fire the 10" Type R , to tall. Its sitting about 1/2" off the bottom of the enclosure. Bottom and back is fiberglass moulded to the floor. Sides are 3/4" MDF, front and top are 1 1/2" MDF, two pieces glued together. Rounded the face freehand with a belt sander. 4" port firing foreward, can feel the air thru the cracks in the front seat when the sub hits. The back seat sits about 1" off the top of the box when its down. Havent had any problems yet with people sitting on it.







  7. #7
    ProgMtl's Avatar
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    Re: 2002 Ext. Cab Chevy (Avatar)

    nice



    System:
    Kenwood KDC-X991 (w/KCA-iP200)
    Sundown SAZ-1500D - Sundown SAX-100.4
    (2) TC Sounds TC-1000's - CDT ES-62i (w/200z xover)

    Vehicle:
    2001 Chevy Silverado Z71 Xcab - BFG KO's 285/75/16
    Wheatley custom tune - Magnaflow exhaust & cats
    SB Filters air intake - 260amp Iraggi alternator

    Refs:
    Sold To: morgans432, elminster, sundownz, flipside1212, getlikeme
    Bought From: djdilliodon, denim

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