Highest SPL in a J-body? - Audio & Electronics Forum

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Highest SPL in a J-body?
Sunday, April 08, 2007 6:13 PM
I am wondering what everyones J is doing SPL wise at Usaci shows. I have noticed that the J body platform of both generations seem to do well with just about anything you put in them. My 2 L7 12s in the compact box with a KX 1200.1 did a 144.4 in the trunk at a Usaci show. Just looking for any positive input from competitors.




Re: Highest SPL in a J-body?
Sunday, April 08, 2007 6:17 PM
144.4 is nowhere near the highest in a j if thats what your asking.



Re: Highest SPL in a J-body?
Sunday, April 08, 2007 6:21 PM
Oh no thats not what Im saying at all. I am just wondering what is the highest in a jbody.



Re: Highest SPL in a J-body?
Sunday, April 08, 2007 6:33 PM
my highest was 148.7 on a TL hoping to be louder this year with a wall





Re: Highest SPL in a J-body?
Sunday, April 08, 2007 6:37 PM
with 2 12's and 1000 watts i did 148.9, in 2 weeks i should be a little over 150 with out a wall



Re: Highest SPL in a J-body?
Sunday, April 08, 2007 8:07 PM
That was last years setup.This year I am running 2 L7 12s with 2 KX 1200.1 amp in a mid wall box, it is just a touch taller than the 1/4 window. It isn't finished by any means but has been tested using a Audio Control 3050 with a true pressure mic. It measured a 150.2 without any close out panels, and is still pressuring the whole car and trunk area. The meter used is about 2 db shy of the Usaci meter as it was compared last year. That should put me in the 153 to 154 range with all finished work and in the regulation location on the windshield. That will be good enough for a state record in MS in the modified 0-1000 class.



Re: Highest SPL in a J-body?
Sunday, April 08, 2007 8:09 PM
Correction 3 L7s



Re: Highest SPL in a J-body?
Sunday, April 08, 2007 8:45 PM
141.7 with 3 12's and 1400 watts But i am now going more sq than spl



Re: Highest SPL in a J-body?
Sunday, April 08, 2007 8:54 PM
Chris Barkley here in Canada did a 154db+ with his wall... DD setup I beleive.

http://www.canadiancaraudio.com/online/513-chrisb.html



My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
Re: Highest SPL in a J-body?
Sunday, April 08, 2007 8:55 PM
+

http://www.chris-mel.com/



My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
Re: Highest SPL in a J-body?
Monday, April 09, 2007 5:54 AM
whats we running im assuming 9915s or 17s and a decent amount of power.

I should be around that ball park here once i get motivated to build.
4 DD 9515s
4 orion 2500ds
itll be walled off.

Re: Highest SPL in a J-body?
Monday, April 09, 2007 9:08 AM
no where near what you will be using n8, plus wont you be running huge voltage as well, im pretty sure he only has stock alt, and now where near the pwer that you will be pushing, I could be wrong but I doubt it





Re: Highest SPL in a J-body?
Monday, April 09, 2007 10:38 AM
if he is street max he is using the stock alt. Im gonna stay at 12 volts though. no 16 for me. he could be running big power though. just big battery power. he has a huge advantage over me in that he is probably not tuned to play music but just for burps. could be wrong on that though. plus his is built im just wishing mine was.
Re: Highest SPL in a J-body?
Tuesday, April 10, 2007 6:43 PM
My stock AC-Delco replacment alt keeps my voltage about 13.7 warm and 14.6 cold. When batterys (3 yellow top Optimas) are fully charged it pulls down to about 12.2- 11.9 on really deep note but comes back fairly quick. Thats not too bad considering with my amps there is a potential draw of 300 amps. I am about to add 3 more batterys and upgrade alt to a 200 amp regulated at 15 volts.that should get a little more current to the amps. I wish I knew how to get my pictures uploaded to the site so I could show my new setup to you all.



Re: Highest SPL in a J-body?
Thursday, April 12, 2007 11:44 AM
mine stock drops to about 12.4 opn a deep note and i have no idea what kind of SPL's ive been hitting but ive won to trophies at my first sound off show!

i cant wait to get to another one soon












GOT ECOTEC?
Re: Highest SPL in a J-body?
Thursday, April 12, 2007 12:27 PM
nothing but red x's





Re: Highest SPL in a J-body?
Sunday, April 15, 2007 6:54 AM
I have seen 151.8 coming from the trunk with setups like yours. i think I remember seeing a wall at about 156.



Re: Highest SPL in a J-body?
Tuesday, April 17, 2007 12:46 AM
i need mid bass!!!












GOT ECOTEC?
Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 11:37 AM
152.5 In my cavalier. Walled off 18's but looking to get at 157 within the next month
Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 12:09 PM
I have been looking into running 2 elemental designs 19ov.2's. in about 12 cubes to 35 hz. I was just going to build a big box and set it in the rear seat. Sorry if im sounding ignorant here but whats the point off walling? because if it has any significant gains i might do it. But this is a daily driver and i would like to wrestle the box out somtimes. The box im thinking of building is 25 x 25 x 50 which is at 12.9 cubes after all displacements except for bracing.



Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 12:16 PM
Dont think youll be getting 50" any direction. It was hard enough to get 12 cubes(not building in the trunk and staying behind the B Pillar. And you dont wanna just throw a giant ass box back there unless you fasten it down to the car.

Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 12:38 PM
my rear seat is 53 wide. Maybe im not seeing everything




Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 1:03 PM
yeah it may be 53 inches wide at the bottom once the seat is out its not flat once you get it all flat its about 48 if i remember right and then it only goes up about 18 inches after that it angles in to 36 i think at the top. 53 wont fit. a few of us have measured this and played with it a bit.
Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 1:05 PM
n8ball2013 wrote:yeah it may be 53 inches wide at the bottom once the seat is out its not flat once you get it all flat its about 48 if i remember right and then it only goes up about 18 inches after that it angles in to 36 i think at the top. 53 wont fit. a few of us have measured this and played with it a bit.
Yea we got like 37 1/2 wide on the front baffle. So it does narrow down quite a bit. But he is talking about not taking the seats out.
Re: Highest SPL in a J-body?
Wednesday, April 18, 2007 1:14 PM
119.2 bitches. LOL .... when I had a system, if you call it one.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
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