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  1. #1

    Member Sales Rating: (20)

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    Default Building a sub box

    Okay, I need some of you freaks over here in the car forums to help me out:D

    We're looking to build a box for my friend, he now has the MM12 in the box Polk made for it, but he's got an '02 Silverado and that thing won't fit under his back seat, so we get to make him a new one, a sealed enclosure is that we're looking at. This is a first for me, and I have a couple questions:

    1 - Any tips on sealing the box? What's the best thing to use (Silicone?), and is there any trick to doing this?
    2 - Do we need any kind of internal bracing in the box? I wouldn't think so given the small size, but need to be sure.
    3 - I assume we'll need some type of filling for the inside. How much, what's the best stuff to get, and how do we install that?
    4 - It looks like the cubic feet is .66, that sound about right? What will be the effect of going over or under that amount? I assume it's better to have more air space than not enough?

    Any other tips, bring 'em on. If there's a website reference that covers most of this, feel free to share that as well.

    Thanks for your help guys.
    Main HT
    Magnepan 1.6QR fronts, POlk R15 surrounds, Pioneer SC-25, Parasound Halo A23, Oppo BDP-105, Panasonic TC-P60ZT60, Sony PS3, Apple TV

    Bedroom System
    Polk Blackstone TL3, Polk PSWi225 Wireless Sub, HK 3490 Integrated, Oppo BDP-103, Sharp Aquos 32" TV, Apple TV

    Office Rig
    27" iMac w/Amarra, AudioQuest Dragonfly 1.2, Focal XS Book, Schiit Valhalla, Cypher Labs Theorem 720, Philips Fidelio X1, Sennheiser HD600, HiFiMan HE-500, B&W P7, LG 47LM7600, Sony PS3, Apple TV

  2. #2

    Member Sales Rating: (1)

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    Default

    get an account at www.fullsizechevy.com would be my best advice. They have box plans and such but you have to be a member to view their threads.
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it

  3. #3

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    Default

    Bracing the box is never a bad idea. You cant have too sturdy a box.

    You dont really need polyfill. If the box is built to spec you wont need it.

    Ive always just used a **** load of wood glue to seal mine with but if you want something more Id say run on down to Lowes and look around at all the different types of sealant.

    .66 sounds a bit small especially for a 12. In comparison, the MM2104 (10") only uses .66. Might want to look into that. Building a box too small will mutilate your SQ.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

  4. #4

    Member Sales Rating: (20)

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    Default

    Oops...looks like it should be .88.
    Main HT
    Magnepan 1.6QR fronts, POlk R15 surrounds, Pioneer SC-25, Parasound Halo A23, Oppo BDP-105, Panasonic TC-P60ZT60, Sony PS3, Apple TV

    Bedroom System
    Polk Blackstone TL3, Polk PSWi225 Wireless Sub, HK 3490 Integrated, Oppo BDP-103, Sharp Aquos 32" TV, Apple TV

    Office Rig
    27" iMac w/Amarra, AudioQuest Dragonfly 1.2, Focal XS Book, Schiit Valhalla, Cypher Labs Theorem 720, Philips Fidelio X1, Sennheiser HD600, HiFiMan HE-500, B&W P7, LG 47LM7600, Sony PS3, Apple TV

  5. #5

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    Dec 2003
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    Chattanooga, TN
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    Default

    Aha! I knew it!!

    Boy I impress myself sometimes. Im right even when I dont know it!! :p
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

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