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    Box Help

    Ok I'm designing my own box using Google Sketch up and Re Box Calculator, I'm making an box for 4-18" Fi BTLs and was wondering could I have the Tuned Frequency at 20Fb for daily use. I'm going to be using it at shows and was wondering if it would be loud. If it helps its going in an 2007 Expedition EL Firing upward. I dont want to wall it because I'm like being able to look at the rear.







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    Re: Box Help

    good choice for the box design. but that may be a bit low. if it were m & this is only IMO i would go about 31. so are you going to be competing in spl?



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    Re: Box Help

    Also I'm going to powering them with a Hifonics HFi3000D one per subwoofer, wired at 1ohm.




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    Re: Box Help

    Ok, please don't use RE box calculator for a setup of that intensity, that would be a disgrace. It's not as accurate as I'd like it to be.



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    Re: Box Help

    i use 12volt.com... its actually very acurate... nice amp choice. ive been told they are a tad bit over rated. but not by much. but yea id still say 31



    MY NEW RIDE- 2001 HYUNDAI SANTA FE (BEST SCORE 147+DB 30-SEC MUSIC-BB2400 & 1 HDC3-18 W/STOCK ELEC)
    2 SOUNDQUBED SDC2.5-15'S ~ 7.06 CUBE @ 37HZ ~ SHARK 2500(FOR NOW,2 STRAPPED LATER)@ 1OHM
    STOCK ALT ~ 1 STOCK DEKA & 2 AGM'S ~ 4 RUNS OF 1/0(2+/2-)


    WIFEYS 03 FOCUS SE TRUNK SYSTEM ~ 143+DB 30 SEC MUSIC AVG
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    STOCK ALT ~ 1 STOCK BATTERY ~ ONLY 6GA POWER WIRE


    2010 FCBC 450SD 3RD OVERALL~2011 FCBC 450SD CHAMPION~YOUTUBE->bgowdy31 & bgowdy3131

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    Re: Box Help

    And don't tune to 20hz, lowest I would would be 26, but I would do 28-29 hz.



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    Re: Box Help

    Why shouldn't I tune to 20hz or use the RE calculator




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    Re: Box Help

    Quote Originally Posted by Dmurria View Post
    Why shouldn't I tune to 20hz or use the RE calculator
    The sub just isn't made for a low tuning like that. Tuning that far below the sub's fs is going to cut your box efficiency. Unless you plan on playing only stuff in the 20's, there's no need to tune that low. Keep tuning in the 30-33hz area and you'll be able to dig down to 25hz with those subs, which is plenty low for pretty much any music. Also, you're going to need more than a single layer of MDF on this thing, and ample bracing as well, something that the RE calc can't take into account for.



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    Re: Box Help

    Ok thanks, I'm going to tune it to 29Hz. The box is going to be 7ft3 for each sub, with an double baffle. How do you get a mirror finish with out using fiberglass




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    Re: Box Help





    Quote Originally Posted by globalminds_ent View Post
    people think that companies are so much better than each other when it comes to amps, but this is all a game people..all of this **** is the same, now some are better than others but in the end all of this **** is the same. These companies want u to fight over who is the best. When honestly there is probably 2 or 3 huge companies that make every single amp on the planet. Wake up people.u don't no who owns this stuff and u don't know who owns these build houses.
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    Re: Box Help

    Quote Originally Posted by Dmurria View Post
    Ok thanks, I'm going to tune it to 29Hz. The box is going to be 7ft3 for each sub, with an double baffle.
    You're going to need to at least do doubled 3/4" material on the entire box. A big, low-tuned box like that will want to tear itself apart if not built right.



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    Re: Box Help

    Quote Originally Posted by RAM_Designs View Post
    You're going to need to at least do doubled 3/4" material on the entire box. A big, low-tuned box like that will want to tear itself apart if not built right.
    exactly, if you don't want to use twice the MDF you can do other types of bracing, but you need to be sure to do it right or you will wind up with a broken enclosure very quickly.




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    Re: Box Help

    28 cubes and dbl mdf and he still wants to see out the back?




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