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Dual 18" ported box help if possible

Discussion in 'Home Theater Projects' started by Dareus, Jun 13, 2018.

  1. Dareus

    Dareus Auditioning

    May 31, 2015
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    Looking to build a box or any idea for my current setup. Basically got these near new after a few car audio trades so would like to use them if possible ported.

    I currently have 2 18" Re XXX subs ( yes car subs but working great :) )
    Currently in a sealed box, parallel to a single 4 ohm load.

    Behringer ep4000 amplifier and a pods signal converter.

    I use it during movies for extra thump. I do have a paradigm ultracube and subs in my paradigm monitor p90 v3's which sound good buuut i'd like shaking lows :)
    For more box office style movies with large effects and deep explosions. I dont have them on too often.

    I tried a wave test and seen i get quite loud at 32-36 hz but i know ported i would go lower.
    I'm seeing if anyone has used car subs before, if finding maybe subs on bottom , ports top? Ports bottom subs top? Subs bottom port in middle? Etc.

    Size of box wont matter i can go up to 16 or more cubic foot.

    Attaching a screen shot from my video i had as reference. Living room is more finished now but this was my setup 7.1.

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  2. Dave Upton

    Dave Upton Audiophile

    May 16, 2012
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    Houston, TX
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    Dave Upton
    Hi Duncan,

    Welcome to the forum.

    I modeled your sub in WinISD (i used parameters for Re Audio xxx v2) and came up with the ideal box volume being 550L (19cu-ft) with a 20.8Hz tune. You could also separate the drivers into two separate cabinets, which would be more space efficient, but require more DSP/EQ on your amp.


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