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Reload Thread: Need to build a Box for Gmc Sierra Ext. Cab.

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    Rc 415's Avatar
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    Need to build a Box for Gmc Sierra Ext. Cab.

    Well, I need to build a new box for my Gmc Sierra Ext. Cab, and Well, heres what I was thinking. My box has to be a really weird shape to get the correct airspace for a vented enclosure. Would Aeroports be better than a baffle port? Heres roughly what my box will look like.


    The box will house a SI Mag D2, and I'm not home now, but dimentions will come after I get home.
    I know the images are crappy, Microsoft Paint FTL, What program do you all use to make box images?







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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    allot of ppl use sketch-up design software... Easy to use and nice layout.... The aeroports will work well... I ported an enclosure for a 93 ford ranger regular cab.... 2.5 ft3 tuned to 32 hz... took up a little leg room since the seat was moved forward to accomodate, but it is possible... I used elbows to turn the ports so that they did not run into the back of the box as it was only 8 inches deep, and ran the ports out the front of the box between the two bucket seats... Your truck is allot bigger then that, and should have plenty of room to work with... just use your creativity and enginuity.



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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Yes, Sketchup looks to be a very nice product, but I'm looking for somthing more along the lines of free .
    Anyway, I got a bunch of dimentions now, I just need to draw the pics, will be posted in a while.




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Ok, here is what I have to work with, I want the box to be 1.5 Cubes, tuned to 32 Hz. What size ports should I use, how many, how long, and where should they be?







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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Is anyone up to designing box plans that will suit my needs?




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Still need help...




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    I there a better place I should be asking this question?




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Quote Originally Posted by Rc 415
    Ok, here is what I have to work with, I want the box to be 1.5 Cubes, tuned to 32 Hz. What size ports should I use, how many, how long, and where should they be?



    Why do you only have 14" o n the side of the center hump? I believe you can get at least 19" just on one side then another 15+ using the center hump. You should be able to get around 54-56" total along the whole floor under the back seat as well. At least thats how much i had on my 03 silverado ex cab. You best bet is to also make the frame for the box and fiberglass the floor to give you optimal air space and proper fit. Not to sure about the tuning part with ports when using an extended cab though




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    I'm not sure, thats just what my current sealed box that I made measures out to be. I do plan on glassing the floor, but the sides and top will be Mdf.




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Here is a new side view I have made, The box is a little more than 1.5 cubes, as the bottom will be fiberglass.



    Where can I put the ports and what kind should I use?
    Last edited by Rc 415; 04-25-2006 at 08:49 PM.




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Quote Originally Posted by Rc 415
    Here is a new side view I have made, The box is a little more than 1.5 cubes, as the bottom will be fiberglass.



    Where can I put the ports and what kind should I use?
    If you can put the ports on whichever face the sub is on will lead to the lowest cancellation between the two. Giving you the cleanest, most accurate sound. As far as port area goes I don't know whats recomended for your sub...




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    The port area will need to be around 870 cubic inches(.5 cubic feet), plus the 1.5 cubes on top of that for the box.




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    fire a two 4" aeroports to the rear. having the sub/ports on the same plane isn't important, well, as important as some people believe. IME, sub firing down, ports to the rear is the loudest in these trucks, if your staying under the seats.


    as too finding the length...check out casrstereo.coms calculator. works pretty good.



    and in case your wondering..i've got a lil experience with xcab chevy's...



    that's a single memphis pr ten.....tuned to 38hz...





    that's a dual ten memphis hpo box.


    and i've thrown a solo x 18 in there too...with the backseat in and out....




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Thats exactly what I was looking for! what length ports are yours?




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    Re: Need to build a Box for Gmc Sierra Ext. Cab.

    Quote Originally Posted by Rc 415
    Thats exactly what I was looking for! what length ports are yours?

    well, it wouldn't help you much. the single 10 box has like 7in^2 of port area (whatever it is memphis recommends for a pr10) and the hpo box has 3" ports per sub. both are tuned higher then you want as well, 38hz, so they'll be shorter then you wish.


    according to the calculator i linked above...you'll need one 4" port 19" long or two 4" ports 41" long......



    hope that helps even more...




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