Thread: ported or sealed box for 2 12's

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  1. #1 ported or sealed box for 2 12's 
    GTX Level Member blakgtp's Avatar
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    I wanna get a couple 12's for my car preloaded in box from sonicelectronix or some online store. Something like these MTX TR7512X2D Dual Ported Enclosure TR75 Series Subwoofers 2 Ohm

    but i dunno if i should go sealed or ported. i heard sealed is better for sq and ported is louder and more bass? tell me what u guys are running and why?
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  2. #2 Re: ported or sealed box for 2 12's 
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    im going to tell you straight up that nothing in a prefabricated box is going to sound good
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  3. #3 Re: ported or sealed box for 2 12's 
    That Loud Guy 1LoudGrandPrix's Avatar
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    some sealed pre-fab boxes are ok, if you go ported go custom.
    reason why i have a slot port? simple i compete
    98 Camaro SS 46k LS1, T56, All Stock. 00 GMC Sierra 2wd ECSB 106k Lm7, 3.73s tow needs lowered..
    01 Grand Prix GTP "201k" ~111k on motor, ~46k on trans, headers, 3.4 and a tune to come.
    01 Grand Prix GT 168k: Mods: Tune by TheOtherNick. Stereo: 320A alt,4 runs 0/1, XS D3400 front, 1 JYP 80ah Lithium rear, 2 Twisted Sounds 3500s, 2 Sundown Audio NightShade v.3 7 National Records..

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  4. #4 Re: ported or sealed box for 2 12's 
    GTX Level Member blakgtp's Avatar
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    ok so i should get sealed if i buy pre-fab. how many watts can i run off the battery? (like some ppl have spare batteries for powering the high powered systems)
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  5. #5 Re: ported or sealed box for 2 12's 
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    a well tuned system will sound the best... ported box will be louder....
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  6. #6 Re: ported or sealed box for 2 12's 
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    On a stock battery if your peak output will be more than 600 watts you will either need to do a big three upgrade or upgrade the battery. I have 1000 watt in my car and they dim the lights pretty bad. I also have a sealed box. It all depends on your music preference. If you listen to a lot of rap go ported. You listen to a long of like jazz or country go sealed.
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  7. #7 Re: ported or sealed box for 2 12's 
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    you should do your big three before you even put a system in...its an upgrade that will cost you 20$ max and the difference is well worth the money. if its done right its great for any electrical system
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  8. #8 Re: ported or sealed box for 2 12's 
    I live here. SlowNA06's Avatar
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    Or you can avoid a Big3 and light dimming by turning down bass boost. Won't be as loud, but it will be... lazier.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  9. #9 Re: ported or sealed box for 2 12's 
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    Bass boost? Bass boost clips the signal all to hell, and should be avoided at all costs. Edit: Forgot to respond to the OP. Honestly, 1 decent 12 ported can keep up with 2 sealed from my experience. Check out www.obsidiancaraudio.com .... one OA-12 is less than $200 shipped. However, as others have stated, it largely depends on your musical preference. Also remember that ported boxes are tuned to specific frequencies which change with musical tastes and different woofers.... so definitely stay away from pre-fab ported enclosures.
    1978 F250 2wd (460 c.i.d. / C6)- soon to give up the powerplant to an '80-'86 F150
    White 2000 Grand Prix GT coupe
    One still slow and loud... other one scoots just a bit.

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  10. #10 Re: ported or sealed box for 2 12's 
    GT Level Member Lenny's Avatar
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    ive always like a sealed box better than ported. sounds cleaner. but just my $0.02
    2007 Grand Prix GXP

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  11. #11 Re: ported or sealed box for 2 12's 
    Donating Users 16MustangVet's Avatar
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    bass boost is not a volume knob! build ported box per specs for what ever sub. capacitors are a joke for anything over 1k watts buy a HO alt and a batcap or xtatic battery specifically designed for car audio. IMO 12s and up belong in a ported box 8's and 10s sounds great in a sealed box, it all depends on what you listen to.
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  12. #12 Re: ported or sealed box for 2 12's 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Quote Originally Posted by 98GrandPrixIraqVet View Post
    12s and up belong in a ported box 8's and 10s sounds great in a sealed box, it all depends on what you listen to.
    I agree with this.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
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  13. #13 Re: ported or sealed box for 2 12's 
    I live here. SlowNA06's Avatar
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    Quote Originally Posted by Fatboy501 View Post
    Bass boost clips the signal all to hell
    Well, yeah.





    If you suck at tuning.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  14. #14 Re: ported or sealed box for 2 12's 
    Audio Moderator I800C0LLECT's Avatar
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    Quote Originally Posted by Explicit_Spade View Post
    I agree with this.

    I don't.

    As long as you abide by physics you can make any speaker sound the way you want. 12's are no different than 8's except for size. Size has nothing to do with whether it should be sealed, bandpassed, ported, horn'ed...whatever. Thiele-small specifications help you consider "best" application for a speaker.
    11 is louder than 10!
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  15. #15 Re: ported or sealed box for 2 12's 
    GrandPrix Junkie CrazyGuy03's Avatar
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    2 kicker comp vr
    1200 watt amp
    sealed box

    14.4 volts with volt booster

    No issues plus thjis set up is 5 years old lol

    won one 2nd place trophy in 07
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  16. #16 Re: ported or sealed box for 2 12's 
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    Here is a video of my kicker's in a prefab sealed box. Box is under specs but still hits hard. Been good since Christmas
    Kicker Comp 10's bangin - YouTube
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  17. #17 Re: ported or sealed box for 2 12's 
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    Quote Originally Posted by SlowNA06 View Post
    Well, yeah.





    If you suck at tuning.
    Look at the wave on an o-scope while you're setting your amp. Bass boost is horrible... square waves like crazy.
    1978 F250 2wd (460 c.i.d. / C6)- soon to give up the powerplant to an '80-'86 F150
    White 2000 Grand Prix GT coupe
    One still slow and loud... other one scoots just a bit.

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  18. #18 Re: ported or sealed box for 2 12's 
    I live here. SlowNA06's Avatar
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    Quote Originally Posted by Fatboy501 View Post
    Look at the wave on an o-scope while you're setting your amp. Bass boost is horrible... square waves like crazy.
    I will be sure to try it if I ever get my hands on one. Poor folk like me tune with a multimeter.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  19. #19 Re: ported or sealed box for 2 12's 
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    Lol I'm poor to bro... I have a rather well-off acquaintance who charges 30 to set amps with an o-scope. I figured it was worth the small investment to know my signal is clean.
    1978 F250 2wd (460 c.i.d. / C6)- soon to give up the powerplant to an '80-'86 F150
    White 2000 Grand Prix GT coupe
    One still slow and loud... other one scoots just a bit.

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  20. #20 Re: ported or sealed box for 2 12's 
    I live here. SlowNA06's Avatar
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    I think I should write another tutorial, haha (I mean, who can't borrow a MM for free?)
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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