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Thread: Ported or Sealed? and Downfire or no?

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    Constant Bitrate Seabass's Avatar
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    Ported or Sealed? and Downfire or no?

    hey everyone, ok this is my situation, i got a priece of crap 96 camry and i just bought a system last wwek because im supposted to be getting a new car soon. Well i got a Rockford Fosgate 1200 15" Punch Hx2. Then i got a Rockford Fosgate 700watt rms amp, the 700s. Well im gonna put it back there and i was wondering how to put it back there. I was thinking 1) put it in a ported box and make it face the back of the trunk 2) make it a sealed box and make it downfire(sub faces the ground), OR 3) make it sealed and make it face the trunk or my face my backseat?

    Well which one out of all of these would give me a nice clean sound and still bump like hell at the same time? I dont really want to face it back beacuse i know its gonna rattle everything, but if i can just get some towels and get rip of the rattling and that sounds the best, then i guess i would do that, but i want the cleanest sound with not too much rattling(if theres some i can take care of it, but if theres way too much it might be a pain) thanks everyone
    -Seabass

  2. #2
    Constant Bitrate Seabass's Avatar
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    BTW i LOVE the sound of subs when there have that trembling sound with real low base, and I llisten to a lot of rap with low base

  3. #3
    I'm sorry, and you are....? frodobaggins's Avatar
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    anyway you do it, 700w, on a punch 12, is gonna pound.

    Pesonally, I would put it in a sealed box facing front or rear
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  4. #4
    I'm sorry, and you are....? frodobaggins's Avatar
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    Originally posted by Seabass
    BTW i LOVE the sound of subs when there have that trembling sound with real low base, and I llisten to a lot of rap with low base
    low bass you say, definitely go sealed
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    IMO the absolute worst sounding thing is when you hear a car go by and it pounding like hell going past and then you hear the bmmmmzzzzzzzzzzzzzzzzzzzzzz bmmmmmmmmmmmzzzzzzzzzz of the trunk and license plate rattling etc. spend some time with a small test box and a test tone cd and find your rattles then dampen them. it will make things sound soooo much cleaner. that and a decent head unit will make or break a nice setup.

    boxes you can do all kinds ported or sealed and there can be a zillion variations that will work with your subs. you can try to search www.termpro.com for some ideas. i have eben told that firing the subs into the car and sealing off the trunk area air tight will do well. there are plenty of guys saying that if you fire them backwards then that sounds the best i dunno. i have a 4 door corolla (and other toyotas) and i faced my sub into the car bolted to baffle board behind the fold down seat. it had a ported enclosure as well but it was real simple. the enclosure was mounted to the board facing forward.

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    heh if you listen to rap like i do then go with a ported box, sealed boxes have TIGHT sounding bass. ported has low bass. Rectangular ports are the best ports for speakers.

  7. #7
    I'm sorry, and you are....? frodobaggins's Avatar
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    Originally posted by Unibomber
    heh if you listen to rap like i do then go with a ported box, sealed boxes have TIGHT sounding bass. ported has low bass. Rectangular ports are the best ports for speakers.
    A sealed box will give lower bass than ported. Maybe you were thinking more on the lines of efficiency. It will be louder in a ported box, but in my opinion, a LOT less clean.
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  8. #8
    Maximum Bitrate Raas's Avatar
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    Originally posted by frodobaggins
    A sealed box will give lower bass than ported. Maybe you were thinking more on the lines of efficiency. It will be louder in a ported box, but in my opinion, a LOT less clean.

    Depends on the sub.

    If I put my subs (no-name-brand) in a ported box the -3 Db fall-off is a lot (5-7Hz) lower (Hz) than when installed in a sealed box.
    However.. Itīs put in a sealed box, īcause that gave me the flatest curve I could achieve..

    Seabass..
    Throw the parameters of your new sub (you should have got them on some paper when you purchased the sub) in a box calculating-program like WinISD and find out what type off box is the best for your sub... Play around with the volume of your box until you have a nice flat frequency responce and the -3 Db fall-off is as low as possible... (pref... something like 30-35Hz)

    HTH

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  9. #9
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    Originally posted by unknown
    IMO the absolute worst sounding thing is when you hear a car go by and it pounding like hell going past and then you hear the bmmmmzzzzzzzzzzzzzzzzzzzzzz bmmmmmmmmmmmzzzzzzzzzz of the trunk and license plate rattling etc. spend some time with a small test box and a test tone cd and find your rattles then dampen them. it will make things sound soooo much cleaner. that and a decent head unit will make or break a nice setup.
    Getting the rattling areas wet will not do any good. You need to damp them, not dampen them! (This is one of my pet peeves with Car Audio and Electronics magazine right now)
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    Well, if you're worried about rattling, once of the most sure fire ways to avoid it, besides deadening/dampening, is to fire into the cabin. If you are going to do this though, you need to have the front baffle (piece that your sub is mounted to) completely isolated from the back of the trunk. Without being isolated, you will have cancellation. What kind of car do you have? A sealed box will usually sound better than ported but it depends on the equipment and build quality of the box. I have a 15" Audiomobile Evo-R in a 2.6 cuft ported box. Feeding it 1200rms, it slams and sounds damn good at the same time. Before we can really tell you much more, we need to know what car you have. Do you want your back seats folded down? I, myself, wouldn't do a front firing setup, unless I planned to have my seats down. I think you will be much happier with a rear firing setup, unless you want to take the time to PROPERLY build and install the box so a minimal amount of cancellation occurs.

    Quinton.
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