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15" alpine type R -port tuning frequency?

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Old 03-10-2011, 08:00 PM
  #11  
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Yeah.. this is why you don't buy boxes on Craigslist for $20 >_<

Just build a new one dude... 1" MDF is very easy to work with and honestly, if you do your measurements up right you can have it cut at home depot, go home, glue and screw it together, drop in some bracing, wrap it in carpet and you're in business.

Should take a grand total of 3-4 hrs to build and swap and now you have a decent box.


xD

Or just get Jalapy to build you a nice ported box, you'll just have to wait a few months before he's actually available from the date he gives you initially.

Just kidding, I still love you.

Anyways..
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Old 03-10-2011, 08:04 PM
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The box won't damage the sub, cranking your amp will (either blow the sub - again - or the amp from having it cranked).
Crossover = where you set your Low Pass (LP) frequency.
Where you want your sub to drop off = What frequency you would like your sub to no longer make noise. For example, I want my sub to drop off at 100hz so I set my crossover at 100hz.
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Old 03-10-2011, 08:07 PM
  #13  
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well i can block the port no problem but then you say it will be louder?
sorry man i dont know what QTC of .707 means and all the technical terms mean either :/

i can take the box out no problem.. it just that it was a hustle to put it in carefully not to scratch the sub. it seems to me that you explain to me the specific settings to get good quality of bass, i would obviously love that but based on what i got and based on my knowledge, i dont think i can achieve 100% quality.

all i want is loud bass and not damaging my sub.
people told me that ported box is louder than sealed.. now you tell me to block the port.. im confused :S
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Old 03-10-2011, 08:11 PM
  #14  
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Ported is louder at its tuned frequency. Your current box doesn't have enough port space to even allow the sub to operate effectively at said frequency, whatever it may be. Probably something useless.

If you don't know how to port or tune a sub just stick with sealed. It will sound good, it will still be respectably loud and it's nearly idiot proof. Just build it to size specs and you're good to go.
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Old 03-10-2011, 08:13 PM
  #15  
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Originally Posted by n0catchyname
The box won't damage the sub, cranking your amp will (either blow the sub - again - or the amp from having it cranked).
Crossover = where you set your Low Pass (LP) frequency.
Where you want your sub to drop off = What frequency you would like your sub to no longer make noise. For example, I want my sub to drop off at 100hz so I set my crossover at 100hz.
i have 2 people here telling me 2 different things in a way..
you say that i will not damage the sub, and Lord Huggington says i will..

my amp gain is properly set cuz i used a voltmeter and tested it so its good. there is no way i can blow my amp unless i crank the music to max forever

im worried about the sub more than anything, cuz i know the amp wont blow it, its the box that worries me.

and i dont have time right since im in school, so i have to adapt to whatever i got right now and ill fix it later
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Old 03-10-2011, 08:14 PM
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Originally Posted by Dilatory
Ported is louder at its tuned frequency. Your current box doesn't have enough port space to even allow the sub to operate effectively at said frequency, whatever it may be. Probably something useless.

If you don't know how to port or tune a sub just stick with sealed. It will sound good, it will still be respectably loud and it's nearly idiot proof. Just build it to size specs and you're good to go.
i have a box 1.6 ft^3 but the sub will take some of it away..
i feel difference between the ported and the sealed, the ported is way louder..

what if i just cut another hole in the box? or make the port longer?
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Old 03-10-2011, 08:15 PM
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Ghetto fix it then. Just cover the port. Screw every 3-4" at least and seal it with caulking. Should take 10 minutes. However if there's anything inside the box that is forming the port I have a feeling it's still going to mess with the sub, having parts of its air space choked off is kind of counter productive...
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Old 03-10-2011, 08:19 PM
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Originally Posted by Dilatory
Ghetto fix it then. Just cover the port. Screw every 3-4" at least and seal it with caulking. Should take 10 minutes. However if there's anything inside the box that is forming the port I have a feeling it's still going to mess with the sub, having parts of its air space choked off is kind of counter productive...
well there is a little tube 6.5 inch long that is easily removed. i can cover it no problem it's just that i want to know, will it be as loud?

and you havent answered my question, can i just make another port or something instead of the sealing idea?
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Old 03-10-2011, 08:23 PM
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If it's just a tube port then yeah, just take it out and seal it.

As for volume, I can't comment. I don't know enough about boxes to say with confidence what will happen with it sealed. It is however a very quick fix and removes tuning issues. Set your LP to 100 and you're good to go.

If you want to change the port you'll have to have someone with more experience in that regard come up with an alternative.

I personally just build my boxes to manufacturer specs so I don't run in to these problems so I haven't had to worry about it.

Craigslist specials are bad for your mental health.
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Old 03-10-2011, 08:34 PM
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Easier to just have a new box designed than to try to explain how to fix your current one.

Sealing up your current box may not be as loud (probably pretty close given how small the port is to begin with), but will be more consistant and sound better.
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