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Message Forums Car Stereo Message Forums > Subwoofers and Speakers > Help wit L7 15 enclosure specs
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deeman08
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 Help wit L7 15 enclosure specs

Alright I have a kicker L7 15 4 ohm ordered an I am ready to start to build a ported box. I used RE's slot port calculator an came up wit a 33x17x17(WxHxD) and a 2.25 in port. This design gave me a 4ft3 @ 31.91 enclosure. It will be going into a caprice and i listen to mostly rap music. So here is my question will this box built by these designs sound good with the kicker L7?

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New Post 07-28-2011 06:39 PM
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daman357
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 RE: Help wit L7 15 enclosure specs

quote:
Originally posted on 07-28-2011 by deeman08
Alright I have a kicker L7 15 4 ohm ordered an I am ready to start to build a ported box. I used RE's slot port calculator an came up wit a 33x17x17(WxHxD) and a 2.25 in port. This design gave me a 4ft3 @ 31.91 enclosure. It will be going into a caprice and i listen to mostly rap music. So here is my question will this box built by these designs sound good with the kicker L7?

try it out and see what it do since u started the build. To me anything kicker sounds better in a sealed enclosure escpecially in a caprice

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New Post 07-28-2011 08:12 PM
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deeman08
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i haven't started the build yet that will be Saturday i wanted to find out how the 32 hz @ 4ft would sound or if anyone recommended anything better b4 i started thanks

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New Post 07-28-2011 08:29 PM
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sicaudio
Senior Member

 

NEVER use RE's box calculator... it is always way way way off...

and never ever use a sub designed for extremely large ported enclosures in a sealed enclosure...anyone that thinks the L7 are better in a sealed box has no real world experience...

I would start at 5.5cf tuned at 32-34Hz...nothing smaller if possible...4cf will choke it a bit but you will gain Power handling.....at 4cf try tuning at 34-38 to keep the spiders from tearing.

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New Post 07-29-2011 03:16 PM
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deeman08
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Thanks for the heads up on REs calculator. Iv used so many different calculators an they all come up wit different answers so now im all confused. Could one of u guys help me out Im wanting roughly a 4ft3 box @ 36hz.

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New Post 07-30-2011 09:10 AM
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sicaudio
Senior Member

 

port would need to be 15.5 x 2.5 x 20 long for 35Hz.. that is as small a port as I would use...it gives you 11.96" of port per cubic foot of air and leaves the sub in 3.24 net cf of airspace. the port velocity will be fairly high but in a trunk you will never notice that. you really need more box space TBH... 4cf gross is good for a low tuned 12" L7 but not truly adequate for a 15"... it will work but it is far from ideal.

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New Post 07-30-2011 11:04 AM
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sicaudio
Senior Member

 

if you can go to 38 wide you could make the port 3 wide x 15.5 tall x 20 deep and keep the same tuning and it drops the port velocity down to 18 which is awesome...it also gives you .6cf more air for the sub :)

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New Post 07-30-2011 11:11 AM
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deeman08
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So a 38x17x20 enclosure with a 3in port would be my best bet? how far from the back of the box should the port stop?

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New Post 07-30-2011 12:49 PM
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deeman08
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thanks for the help so far sic

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New Post 07-30-2011 12:56 PM
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sicaudio
Senior Member

 RE:

quote:
Originally posted on 07-30-2011 by deeman08
So a 38x17x20 enclosure with a 3in port would be my best bet? how far from the back of the box should the port stop?

needs to stop exactly 3" away then turn 90 degrees and finish the full length needed with a 2nd pc...

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New Post 07-31-2011 11:42 AM
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mmmadog
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Dude just checked the factory manual and kicker most certainly recommends sealed inclosures. Always do what the factory recommends.

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New Post 08-02-2011 09:17 PM
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SINTORMAN
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 RE:

quote:
Originally posted on 08-02-2011 by mmmadog

Dude just checked the factory manual and kicker most certainly recommends sealed inclosures. Always do what the factory recommends.



... Yeah don't listen to the guy that has 26 years of experience that would be dumb. BTW over 95% of youtube videos with square kicker subs the enclosure is ported fyi. "Always do what the factory recommends." ROFL.

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New Post 08-02-2011 11:51 PM
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mmmadog
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Coming from a guy that jb welds his alternator and tells everyone thats the way to fix it. Iam with daman this place is full of laughs.

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New Post 08-03-2011 12:33 AM
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SINTORMAN
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 RE:

quote:
Originally posted on 08-03-2011 by mmmadog

Coming from a guy that jb welds his alternator and tells everyone thats the way to fix it. Iam with daman this place is full of laughs.



Yeah cause pulling an alternator and paying 100 bucks plus to fix it was a smart idea. I made my alternator last another 2 months and then by then I could afford a HO alt. Siding with Daman, now thats humor.

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New Post 08-03-2011 12:41 AM
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SINTORMAN
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 RE:

quote:
Originally posted on 08-03-2011 by mmmadog

Coming from a guy that jb welds his alternator and tells everyone thats the way to fix it. Iam with daman this place is full of laughs.



You just wish you had the brilliance to come up with a fix like that on the fly. LOL.

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New Post 08-03-2011 12:42 AM
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