My double JL sub box

[nis.k.a.]

What kind of amp do you have running those? I'm assuming you wired them in series.

[Anthony]

How come you decided to relocate the battery to the boot? Or is that a second battery? Do you get any problems with the stock alternator charging them both if that is the case?

[P11GT]

Nah, it looks kinda close doesnt it? but theres about an inch clearence between the magnet and box, plus, ive recessed the subs, so they actually sit flush. The excursion of the subs aint that much so hothing to worry about.

Heres a picture of the back of the box, and how ive made it to maximise the room available, its a bit blurry but you get the message.

[nis.k.a.]

Excursion depends on the power put to them. JL's have one of the longest excursion's in the business.

[P11GT]

maybe, the excursion (Xmax) on my JL's are 0.438 iches or 11.9 mm so theres plenty room there. In my experience, Celestion subs have a bigger excursion length, as apposed to my JL's

[nis.k.a.]

Really?.....My 10w6's (in old G20) knocked the grilles straight off the box. Not just PLOP.....more like shot them off the box. I measured about 1 and 1/4" from woofer to grille. I don't know if you've ever seen the JL demo where you apply progressive frequency to the woofer. Those suckers will jump a good 1 and 1/2" to 1 and 3/4".


I take that back. It would throw 1 and 1/4" to 1 and 1/2". I just measured 1 and 3/4" that was way off.

[Swonder67]

I guess it just depends on how much bass boost you set your amp at.

[nis.k.a.]

More like how much power your amp is putting out. Maxed out gains sound nasty.

[Mrcoilover]

Originally posted by P11GT
Heres a picture of the back of the box, and how ive made it to maximise the room available, its a bit blurry but you get the message.

If I'm not mistaken, the soundwaves are supposed to bounce of the back of the trunk. Wouldn't having the subs so close to the magnet or top of the trunk distort the sound? It has no room to travel and create optimum bass.

[P11GT]

nope.

[Mrcoilover]

Originally posted by P11GT
nope.

I don't know. I really don't think your getting the best bass out of those JL's. But the set-up is nice and as long as your getting the thump then it's all good. I guess you can't keep W6's from sounding bad. But the thing I said about the soundwave travel is very true indeed. You probably don't notice but the sound from your 6x9's or whatever is above the subs is distorted by the bass from the subs. Looks good. I can tell you like LED's.

[nis.k.a.]

Standard square boxes should be avoid. His set up is good for the way his car is designed. I also found that my 10W6's are best utilized by the woofer shooting straight up and not "bouncing" off the back of the trunk like most people think. Enclosures are for optimum use of the speaker, in different ranges (sealed, ported). But the facing the enclosure towards the trunk is not always the answer. I also messed with my JL enclosure to get the best sound out of it. Shooting straight up was indeed the answer for my G20. Facing rearward, you only were able to hear the lower frequencies; it sound pretty shitty.

[Mrcoilover]

No soundwave travel, no soundwave travel, no soundwave travel. I'm right, you're wrong. j/k
I got my info from many car audio stores.

[nis.k.a.]

soundwave travel differs between all cars.

[Mrcoilover]

Originally posted by nis.k.a.
soundwave travel differs between all cars.

True, but we have a big trunk and the rule still applies.