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  1. #21
    Join Date
    Jan 2008
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    Keuka Lake, NY
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    5,489

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    I plan on putting feet on it to get it off the floor a bit. With the xlv freeboard I should not have to worry about waves over the bow.... Famous last words.

    Why would the resin not protect the wood. I was told it would waterproof it.
    A Day at the Lake...Priceless
    A Day in Powder...Endless


    Joe V
    2012 Möbius XLV~ Loaded & Exiled
    2007 Outback V ~ sold

  2. #22
    Join Date
    Jan 2010
    Location
    North Texas
    Posts
    1,788

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    I'd build it out of ply as well. Go that route first and save some headache. Moisture is a beast...it gets where it wants when it wants.
    06 Supra 24 Gravity Games

  3. #23
    Join Date
    May 2009
    Location
    Dallas, TX
    Posts
    880

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    jm,
    Polyester resin is micro porous. Epoxy resin is a little better. If your boat had no gelcoat coating to seal the resin/glass hull it would sink like a rock.
    You can build a resin-coated mdf box and run a hose over it continuously with no problem....IF drainage is part of the equation and if the box execution is perfect, ie; no seams, no staple/nail/screw depressions, radiused edges, etc. But a boat is a little different. It's a sauna under cover with a little moisture in the bilge. With a rare roller over the bow water gets everywhere. If the box sits on carpet you have a mold and mildew trap that will wick up moisture through any coating and will eventually delaminate even the best grade of solvent based ply. Don't use automotive carpet in any case as it will hold moisture. If carpeting use only a marine grade mildew resistant rubber-backed carpet. Again, the materials are important but the construction and installation details are critical in any case.

    David
    Earmark Marine


    Quote Originally Posted by jmvotto View Post
    I plan on putting feet on it to get it off the floor a bit. With the xlv freeboard I should not have to worry about waves over the bow.... Famous last words.

    Why would the resin not protect the wood. I was told it would waterproof it.

  4. #24
    Join Date
    Jan 2008
    Location
    Keuka Lake, NY
    Posts
    5,489

    Default

    David,

    Thanks for the input. I can change the materials. Should I go plywood instead of mdf?

    Will the sound be audible in differences. What does earmark use on there sealed boxes for material.
    Last edited by jmvotto; 05-10-2012 at 10:08 AM.
    A Day at the Lake...Priceless
    A Day in Powder...Endless


    Joe V
    2012 Möbius XLV~ Loaded & Exiled
    2007 Outback V ~ sold

  5. #25
    Join Date
    May 2009
    Location
    Dallas, TX
    Posts
    880

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    We use resin-coated or polyurethane-coated (real bed liner) mdf with all the disciplines that I described and quite a few more. We have products in the market that have not failed since '98. As an upgrade we use MEDEX which is a solvent-based construction fiberboard. The MEDEX has greater water resistance and holds screws better than standard mdf. Either is highly acoustically inert. MDO, a ply product, is the equivalent of the MEDEX. I would still coat anything. If you use 0.75" stock I cannot see how the sound will differ. Again, focus on the execution of making a perfect box no matter what you use. No caulked holes to pass the wire. Elevate the box. Build in drainage and evaporation. No automotive carpet. etc.

    David
    Earmark Marine


    Quote Originally Posted by jmvotto View Post
    David,

    Thanks for the input. I can change the materials. Should I go plywood instead of mdf?

    Will the sound be audible in differences. What does earmark use on there sealed boxes for material.

  6. #26
    Join Date
    Jan 2008
    Location
    Keuka Lake, NY
    Posts
    5,489

    Default

    Quote Originally Posted by EarmarkMarine View Post
    Build in drainage and evaporation.

    David
    Earmark Marine
    Not sure what this means in a sealed enclosure?
    Joe
    A Day at the Lake...Priceless
    A Day in Powder...Endless


    Joe V
    2012 Möbius XLV~ Loaded & Exiled
    2007 Outback V ~ sold

  7. #27
    Join Date
    May 2009
    Location
    Dallas, TX
    Posts
    880

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    Elevating the enclosure off the sole with HDPE pads and always maintaining space between the enclosure and carpeted surfaces.

    David
    Earmark Marine

    Quote Originally Posted by jmvotto View Post
    Not sure what this means in a sealed enclosure?
    Joe

  8. #28
    Join Date
    Jan 2008
    Location
    Keuka Lake, NY
    Posts
    5,489

    Default

    got it drainage of the boat with clearance vs the internal speaker drainage.

    Thanks gain for chiming in on this..
    A Day at the Lake...Priceless
    A Day in Powder...Endless


    Joe V
    2012 Möbius XLV~ Loaded & Exiled
    2007 Outback V ~ sold

  9. #29
    Join Date
    Nov 2009
    Location
    Kaukauna, WI - 3minutes from glass
    Posts
    1,600

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    For elevation use hockey pucks they are cheap, easily accessible and durable.
    -Mark

    02 Mobius LSV - GIII Ballast - Kicker 6500.2 Six Pack powered by 650.4 - Polk cabins, 10" L5 powered by Kicker 750.5 - Perfect Pass wakeboard pro

    "Hey you only live once"

  10. #30
    Join Date
    Mar 2012
    Location
    South Carolina
    Posts
    552

    Default

    Quote Originally Posted by New Guy View Post
    For elevation use hockey pucks they are cheap, easily accessible and durable.
    That is a pretty good idea
    2008 Supra 21V
    1,450 lbs., Gravity III ballast system
    Z5 Cargo Rack
    Stereo: Pair of Wetsounds Pro 80's, Rockford Fosgate P500-2, Kicker ZX200.4, Exile ZLD, stock Kicker in-cabins, stock Kenwood HU
    Tow rig: 2008 Slate Tundra, Bilstein 5100's (F&R)

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