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#1700084 - 08/30/09 08:43 PM

Hi!! Box right dimensions for JL 13w7? Sounds bad.

Xtian
SD Newbie

Registered: 05/14/09
Posts: 13
Loc: NJ

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Setup is:

JL 1000/1 V1
13w7 at 3ohms
Enclosure is 40W x 18.5H x 18.5D with a 4W x17H x25L Slot port. (6.2x cu. ft. at 30 hz)
4 Gauge wire with 2 batteries.
Stock everything else :-(

This box sounds better than the JL spec box, but it seems sloppy compared to 12w7/HO box I had before. It also seems as though the Sub is bottoming out and I don't want to hurt the sub. What would be better dimensions to make it louder. It's just that it sounds almost as loud as the 12w7.

I had a box built to JL spec before this and it sounded like it was tuned to 45-50 hz and I couldn't stand it. That's why I tried a different box.

Thanks!!!!

I know the box is too big, but I am looking for an alternative to the JL Spec'd box.

Edited by Xtian (08/30/09 09:16 PM)

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#1700106 - 08/30/09 09:43 PM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: Xtian]

highend64
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Registered: 11/04/00
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Loc: CA

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You need a net. volume of 2.375 cu.ft. for the 13W7. 6.2 cu.ft. is too big(about 3X bigger what it suppose to be) for the 13W7 which it is acting like it is in free air.

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#1700107 - 08/30/09 09:46 PM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: highend64]

basher8621
SD I wear red in a Crips neighborhood

Registered: 09/30/07
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Can you tell me why you are running two batteries?

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#1700241 - 08/31/09 11:18 AM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: basher8621]

Xtian
SD Newbie

Registered: 05/14/09
Posts: 13
Loc: NJ

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Originally Posted By: basher8621

Can you tell me why you are running two batteries?

My lights don't dim and my fuse doesn't blow with the extra battery.I don't have the $ for an H.O. alternator right now.

I've read to make the box slightly bigger than the JL Spec box. What dimensions though?

Edited by Xtian (08/31/09 11:45 AM)

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#1700508 - 09/01/09 07:06 AM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: Xtian]

jcresci
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Registered: 12/25/08
Posts: 1429
Loc: SSF, Bay Area

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Why did you change from the HO Box?

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#1700581 - 09/01/09 09:50 AM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: jcresci]

Xtian
SD Newbie

Registered: 05/14/09
Posts: 13
Loc: NJ

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Originally Posted By: jcresci

Why did you change from the HO Box?

I felt it wasn't enough and got the 13 for a steal from my brother.

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#1703296 - 09/08/09 09:36 PM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: Xtian]

Member # 6056, Jigga
Bitch I'm Amazing
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Registered: 05/19/00
Posts: 17013
Loc: Columbus, OH

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play a 20Hz test tone and feel the bass.

did a 12w7 in the recommended box last week off of a 500/1. wasn't blown away by the sheer volume of the sub. but when i mic'd it and noticed it did 130db at 20Hz i "felt" what the w7 technology was all about. as for relatively "flat" response, the sub was within 2dbs from 30Hz up to 50 Hz. it peaked at 135db at 40 hz.

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#1704611 - 09/12/09 10:57 AM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: Member # 6056, Jigga]

93_chevy
fabricator
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Registered: 07/01/02
Posts: 3538
Loc: San marcos, TX

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6 cubes is WAY f'n big for that sub no wonder it sounds like dump.

try 3-3.5

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#1704657 - 09/12/09 02:37 PM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: 93_chevy]

Xtian
SD Newbie

Registered: 05/14/09
Posts: 13
Loc: NJ

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I've since built another box that has a net volume of 3.7 althought it sounds decent is still too high. I'm not sure what I'm doing wrong. I've done all the calculations and research. When I have a chance I'm going to make another. I'm not the type to pay anyone for it because I want to learn.

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#1709507 - 09/23/09 12:10 PM

Re: Hi!! Box right dimensions for JL 13w7? Sounds bad. [Re: Xtian]

93_chevy
fabricator
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Registered: 07/01/02
Posts: 3538
Loc: San marcos, TX

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what is it tuned to...and whats the port area...

still a little large, which explains the sloppiness....try jl recommendation

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RF 4004
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jl w3v310's sealed
oh she bangs

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