2 or 4

GoinDefxB
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I have 2 15" Kicker L7's and I'm looking to get 2 more. Right now I have a JL 1000x1 amp running the 2. I would purchase another 1000x1 JL to match it and push the other 2. I'm wondering how much louder to the human ear would it be with having 4 instead of 2. Thanks!

 
Theoretically the increase would be 6db since you are doubling both cone area and power.

But, that's only in theory. Real world results will vary.

To the ear, it will be noticeably louder, but probably not "twice as" loud.

 
From the looks of your picture that enclosure is extremely small for those subs. why not build a proper ported or sealed enclosure?

 
If you port those and give them twice the power your giving now you'll most definetly get louder. Your not even giving those subs have there rated rms power. You really need to give each of those 1,000 watts *EACH*! I would just give those more power and build a new box and you'll be set....

 
My advice to you is go with a bigger box and just add a 1000/1 to each sub. Give each sub 5 cubes roughly and put a slash on each one and youll be happier than with 4 sealed. trust me

 
sell that amp for like 500 get a orion 2500d for like 425. And spend the extra 75 dollars you have left over for building a couple enclosures see which one you like best ie. 4-4.5 net each tuned 33-37 hz are perfect for those subs and look at it this way you wont spend any money.

 
honestly the xb doesn't really have a big trunk, if he is goin to do 2 he will have to have a tall box in their, i would just run 1 15" in a proper ported box...

 
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GoinDefxB

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