got 2 questions
What are the dimensions to the jl 12w3v1?
will i need to change from a 1000 watt amp to a 2000 watt amp if im going to run 2 12JLw6w1?

 

Ok, you are asking for the dimensions of the 12w3v1, but asking if you need to upgrade your amp if you are going to use a pair of 12w6v1's?

http://mobile.jlaudio.com/pdfs/8-12W6_BDS.pdf

^^ that should be the specs for the v1's and no, 2k will be way too much power.