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perfect sub box

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=75538
Printed Date: May 24, 2022 at 3:40 PM


Topic: perfect sub box

Posted By: countdrcaula76
Subject: perfect sub box
Date Posted: April 02, 2006 at 4:02 AM

hi
i have a kicker cvr sub in my suv , i have the kicker 12" cvr sub in  1.25 cu. ft , but im not hapy with its performance , i want a ported box so can u pls help me . the dimensions thatare available for the sub box place are here 
top width 4
bottom width 10
heigth 16
length 37

thi is a wedge box taht will fit right behind my rear seat . all the above are internal diameters.will the box work fine ? and i cant place a square port in the box so can u give me the dimensions of the round port

pls help me in building the perfect bo for the best performance



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- saif ullah khan



Replies:

Posted By: stevdart
Date Posted: April 02, 2006 at 9:20 AM

You cannot make a "perfect" box by changing your current sealed into a ported.  The CVR has an EBP of 41, so it should use a sealed enclosure, not ported.  If you tried to vent a woofer that falls so squarely into sealed category such as this does, you'll find that the port length will reach very long dimensions, and wouldn't fit into your present box without displacing a great amount of the available air space.  Even in a box twice the size of what you have, the output with ported would be very peaky and would diminish SQ in favor of more of a bandpass-type sound.

Find other methods of making this sub sound better.  You can use a sealed box as large as 130 liters for best SQ - deepest bass.  https://www.kicker.com/06/tech-support/manuals/manuals/2005/2005%20CompVR%20Sub%20Manual.pdf



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: countdrcaula76
Date Posted: April 02, 2006 at 2:55 PM

hi . ok but i dont know if i can fit a 4.59 cu ft box in the space i have . so wat should i do .and one more thing ok  my current audio set up is as follows

boston fs-60 components (front)
 mtx 6933 (6x9 rear) in a wedge box
 blaupunkt gta-470 (70x4 for the front and rear)
 mtx 421d (400x1)
 kicker 12 in cvr sub (05cvr12)

now do i need and 8" speaker for the mid range ? i feel that the bass deliverd by the kicker 12" that i have is not accurate . and some times sounds really bad. is an 8" better or a 10"



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- saif ullah khan




Posted By: boardinbum
Date Posted: April 02, 2006 at 6:27 PM
You could put that sub in a 2.5 ft^3 box (<- volume after displacement of the sub and port) tuned very low to about 26hz (a 4" port 17" long). That'll give you a lot more low end and it'll be a little louer.




Posted By: boxmaker85
Date Posted: April 03, 2006 at 12:27 AM
I'm gonna have to say keep this sub sealed up. Basically what Stev was saying, this sub's specs basically say it should be in a sealed box. If you want to make the sub "louder" you can make it to it's largest sealed box recomendation (won't be a big difference IMO unless you go out of the range and out of range means less sound). The L5 Kicker solobarics are ment for ported, they sound awsome there but keep those compvr's sealed up, better SQ also.




Posted By: countdrcaula76
Date Posted: April 03, 2006 at 9:50 AM

hi

thanx a lot for all the help

acually today i just ported the sealed box of 1.25 cu ft to see if it makes any difference . well i put a 4 inch tube whch is 16 inch long and i did get better bass , but the bass was a lot muddier  . i want clean loud bass . and its kind of confusing that 2 ppl say keep it sealed and one person saying go ported  . i want good accurate loud bass of this sub woofer .so can anyone tell me wat box do i  get and wat size . thank u so much.



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- saif ullah khan




Posted By: geepherder
Date Posted: April 03, 2006 at 7:55 PM
Differences of opinion, that's all.  If you're beginning, I'd recommend sealed as well.  Design is not as tough.  I saw you added a port the size that was recommended above, but did not rebuild the enclosure.  That's like playing Russian roulette.  If you want to try a ported box, spend some time doing research- you can find many enclosure design programs online (many for free).  You could probably come up with several links by using the search function on this forum which is located in the upper right side of this screen.

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My ex once told me I have a perfect face for radio.




Posted By: willdkartunes
Date Posted: April 03, 2006 at 9:20 PM

You really should stick with a sealed enclosure.  Getting a bigger sealed enclosure would make it sound better, but I agree that it will not make an overwhelming difference.

It kinda sounds like your trying to get the performance of a Ferrari from a Honda, which is just not gonna happen...  If your that unhappy with your bass then you might wanna consider another speaker.



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Do whatever makes you happy in life without diminishing the happiness of others




Posted By: stevdart
Date Posted: April 03, 2006 at 9:34 PM

stevdart wrote:

If you tried to vent a woofer that falls so squarely into sealed category such as this does, you'll find that the port length will reach very long dimensions, and wouldn't fit into your present box without displacing a great amount of the available air space.  Even in a box twice the size of what you have, the output with ported would be very peaky and would diminish SQ in favor of more of a bandpass-type sound.

countdrcaula wrote:

acually today i just ported the sealed box of 1.25 cu ft to see if it makes any difference . well i put a 4 inch tube whch is 16 inch long and i did get better bass , but the bass was a lot muddier  .

.....sometimes I wonder why I spend my time....posted_image



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: willdkartunes
Date Posted: April 03, 2006 at 9:42 PM
stevdart wrote:

.....sometimes I wonder why I spend my time....posted_image


Don't feel bad. You told him the correct information and you can't help it that he didn't feel like listening to you. I was gonna ask why he even bothered asking for help if he wasn't going to take our advise.....



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Do whatever makes you happy in life without diminishing the happiness of others




Posted By: countdrcaula76
Date Posted: April 04, 2006 at 9:32 AM

hi

sorry stevdart , i dint mean to make u feel bad , i just wanted to see the difference if the box would be ported thats all coz , i was any way getting a beter box  . so was not able to decide on what kind of box  .  i think ill just go a head and replace the sub . can any one suggest me a good sub for the same price range ?

and stevdart sorry once again .



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- saif ullah khan




Posted By: stevdart
Date Posted: April 04, 2006 at 9:44 AM
Thank you for the kind words...sometimes one just has to find these things out by trial & error, eh?

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: countdrcaula76
Date Posted: April 04, 2006 at 10:48 AM

hi

how do u think this sub will perform Pioneer TSW2000   https://www.electronicexpress.com/product?prod_id=4563 .  i have an suv and i need good clean bass.



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- saif ullah khan




Posted By: boardinbum
Date Posted: April 04, 2006 at 12:14 PM
One of my favorites. A Type R will work wonderfully in a fairly small vented enclosure. I believe it requires 1.7ft^3(gross volume) box. I ran one of these in my truck for a couple of months and was very impressed.
Another good one to look at would be an Infinity Kappa Perfect. It's has amazing sq for a very good price.




Posted By: willdkartunes
Date Posted: April 04, 2006 at 8:41 PM
countdrcaula76 wrote:

hi

how do u think this sub will perform Pioneer TSW2000   https://www.electronicexpress.com/product?prod_id=4563 .  i have an suv and i need good clean bass.


This Pioneer isn't too bad for the price. The Infinity Kappa Perfect would be a better choice IMO.



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Do whatever makes you happy in life without diminishing the happiness of others





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