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Old 02-25-2004, 02:20 AM   #1
McBain_TP
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Default Sub enclosure lowering rear?

Hey, I got a JL 12W6V2 mounted in what looks to be a 18" X 18" X 28" enclosure. It is very heavy, perhaps 50-60 lbs. Is is just me or can this weight lower the rear a half-inch or so? It looks like the back end of my car is lowered somewhat, just about the right height. I'll be installing Eibach springs in a few months, so I don't want to have the rear way lower on the softer springs.
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Old 02-25-2004, 10:20 AM   #2
Aaron'z 2.5RS
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I used to have a VW with a saggin azz.....take a look at the pic, this was with 3/4" Neuspeed springs....I had 2-12z, 3 amps and 125lbs of dynamat. I never had a problem after i installed the springs, as compared to stock were i was rubbin tire when i would hit a dip in the road...



Thing is, most lowering springs are progressive rate, so they tighten up as the the shock compresses.....

I wouldn't worry much...if anything your new springs will be stronger not weaker....
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Old 02-25-2004, 10:39 AM   #3
tdxflex
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You might have tire rubbing issues when you lower the car with eibachs and your rear end is sagging. Running additional camber can help this, probably want to buy camber bolts so that you can prepare for this potential problem. The stock springs in the rear are fairly soft relative to eibachs, but still they are also loweing springs. A lot of it also depends on what size tire you're running, if you're stock it's probably not a problem.
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Old 02-25-2004, 12:36 PM   #4
veteq
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I noticed the same thing, when I placed the "box" in the trunk, the backend dropped about 1"

2 12" about 60lb

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Old 02-25-2004, 01:46 PM   #5
OneManArmy
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Dude if you go with things like 2 twelves and a particle board box and amps and stick them in your trunk of course it's gonna sag.

That is anywhere from 60-120 pounds from what I have seen. In general every 2 twelve system I have ever seen has wayed in around 75 pounds on average.

Only way you aren't gonna sag is if you stick a higher weight spring set in the back which could adversely effect your handling.

This is the major reason I have never been a fan of huge systems in performance cars. Besides the fact I don't see too much of a reason for it.

At most I'll be running a single 10.
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Old 02-25-2004, 01:50 PM   #6
the suicidal eggroll
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yeah mine sags
I have a single 12 in a ported box, weighs in around 70lb plus amps
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Old 02-25-2004, 04:52 PM   #7
McBain_TP
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Darn. I have 225/45/17s, so they might rub. I might have to get some fancy springs or coilovers.
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Old 02-26-2004, 12:12 AM   #8
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Well, I know what I'm about to suggest is a bit much but you could take that 12" and put it in a sonotube. End caps would be about 1.5" thick and should cut the weight almost in half. Then when you install the springs there will be no extra lowering because of a heavy box.

And just as a note - The JL 12W6V2's suggested sealed enclosure size is .90 - 1.50 cu.ft. The vented enclosure suggested size is 1.25 - 1.75 cu.ft. If the enclosure size is truly 18 x 18 x 28 then it is way way to large for that sub (which is around 5.4 cu.ft.).
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Old 02-26-2004, 03:11 AM   #9
McBain_TP
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I guestimated the enclosure size. According to Tweeter, they built it with JL's specs. I saw the same enclosure in another store, so mine wasn't a fluke. I'll keep the sonotube in mind, but the enclosure cost a lot of money.
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