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    Newbie help -- ported box

    Hey guys, I'm a complete newb when it comes to designing and building my own sub enclosure. In fact, the system I'm installing is my first system, so I'm a car audio newb too. :P

    I've read the Basic EDU for a ported sub box but I still need some help and some questions answered. :P

    The subs I'm working with are Kicker CompVR Aluminized. I'm going to be putting two in and have a ported box. Each sub needs 1.75 to 2.25 cubic feet, and I'm going to go with 2 cubic feet.


    So what I need help with is the port and tuning the subs. I want to tune the port tuned to 35 Hz. I'm using WinISD at the moment to figure out the dimensions for the ports but I need some help/input.

    So the specs that I have right now are these: 2 in x 12.50 in by 23.25 inches deep. Does that sound like it would work? I have the other things set at 2.00 cubic feet and 35 Hz tuning.

    Second, for the positioning of the port, should I have it so that the ports join up as one or should I have for each sub, like on the outer edge of the box on each side?

    Sorry if this is long winded and all. If there's any more info I need just say so and I'll try to find it!

    Thanks!







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    Re: Newbie help -- ported box

    Ehhh just buy my box




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    Re: Newbie help -- ported box

    Hey I'd buy a box, but sadly I'm a high schooler with a limited budget. :P

    Anyways, I think it'll be a good thing to figure out how to do now so I can make better boxes if I upgrade my system later. Plus, my dad's a carpenter so I have all the tools I'll need, and he can help me.




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    Re: Newbie help -- ported box

    O ya might as well... I just know I **** it them so I buy hahaha




    Western Rep.

    99 Honda CRV: (Always Changing) ___________ 79 F-150: Show Truck ________________
    -Head Unit: Eclipse CD7100________________ -Head Unit: Eclipse CD7100
    -Sub Stage: Sundown SD-2 8's sealed________ -Sub Stage: Looking
    -Mids/Highs: Deciding_____________________ -Mids/Highs: Scan Speak & Blaupunkt
    -Sub Amp: MMATS Hifi 6 channel____________ -Sub Amp: American Warrior Set (Zed Built)
    -Mid Amp: ^^^ 5/6 bridged at 1 ohm_________ -Mid Amp: ^^^

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    Re: Newbie help -- ported box

    Well if I find out I'm absolutely lousy at designing/building my own box I'll probably have to resort to buying too. But this'll save me some money. Hopefully.




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    Re: Newbie help -- ported box

    It should cuz of shipping unless you eff up like me and gotta keep buying sheets off wood hahaha




    Western Rep.

    99 Honda CRV: (Always Changing) ___________ 79 F-150: Show Truck ________________
    -Head Unit: Eclipse CD7100________________ -Head Unit: Eclipse CD7100
    -Sub Stage: Sundown SD-2 8's sealed________ -Sub Stage: Looking
    -Mids/Highs: Deciding_____________________ -Mids/Highs: Scan Speak & Blaupunkt
    -Sub Amp: MMATS Hifi 6 channel____________ -Sub Amp: American Warrior Set (Zed Built)
    -Mid Amp: ^^^ 5/6 bridged at 1 ohm_________ -Mid Amp: ^^^

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    Re: Newbie help -- ported box

    It is nice to see someone new here actually do research before posting.
    Here is what I recommend
    Have a box designed by an expert here who will basically provide you with a blue print you can follow.
    Ram-Designs, Mobile Enclosures are 2 of the guys on here that do designs.
    That way you get to learn while still building your own box.




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    Re: Newbie help -- ported box

    Hopefully we don't screw up too much wood. :P

    Okay, now I have another question. :P So what I'm thinking now is having the two subs share one port in the middle. If I have them sharing a port do I need to change the port size, like double it? Or should I just make a separate port for each sub and still have them in the middle, just divided?




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    Re: Newbie help -- ported box

    Crispin, how much would it cost to have one of those guys design a box for me?

    EDIT: Ignore that, checked Ram Design's website. I'll think about it but I'm still going to look into how to design my own box. :P I'm just cheap like that. But I will seriously consider Ram Design. He looks like he does good work.




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    Re: Newbie help -- ported box

    Ram Designs is a pro




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    Re: Newbie help -- ported box

    Got measurements (Max area you have to work with; H/W/D)? I will help you out for free.. Just PM me.



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    Re: Newbie help -- ported box

    Have both subs share the same airspace and do one large port. I'd do the port on a side as opposed to between the subs. Just change the port size/number/etc. on winISD and it'll cough up the correct length and let you know if your port velocity is too high or not.




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    Re: Newbie help -- ported box

    the port area is determined by the available air space that is inside the box. Most people will say use 12-16 in^2 of port area per cubic foot of internal airspace. so say you need 4 feet^3 of airspace, after displacement, and you decide to have 12 in^2 of port area per cubic foot. that would yield 48 in^2 of port. from there use WinISD to find out the length of port you would need......



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    Re: Newbie help -- ported box

    Its easiest to just put the port to 1 side of the box when doing your first slot port. You could always use 2 4inch pvc pipes as well. I prefer to use round ports cuz you just cut the hole out and drop in the tube ans glue around it and you're done.



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