JL 12W3V2 D2 Amp Help

my amplifier has a LP crossover adjustable from 30-400 HZ so i should this one to 80Hz after installing the HP 30HZ . Does this need to be installed NEar the amp or Near the decks preout i? Because if i hve to install near the amp , which i think is what needs to be done, i will run into a problem because their is a plate that tries to hide wiring to the amps and this plate will be in the way if i install this HP near the amp. I want if i can aget a bendable version.

Near the pre-outs is fine. Or you can just get a short length of rce to put between the f-mod and your amp. New Project: 2003 Pathfinder

Sorry, no Gumby models available.. so just pick up a pair of short RCA's and install the filter between RCA's. 

Ok so even though im not buying a new amp right now i should still purchase this HP Filter 30hz and install it near my amp i have? i dunno maybe i will keep this alpine amp its feeding it 220W Rms and i dont know if i really shoud get a new amp its a V12 and its about 400 dollars to buy it new i got it for 100.....maybe illjust pick up any 100*2 amp for components or so.... any suggestions this amp i have is pusing the sub beyond my needs i think if i were to buy a new amp just for the sub it would be just to show off. i can get another one of these alpine amps cheap aswell 120 bux cdn or so shoudl i do this or invest in a new amp? So i should go ahead and buy this HP filter asAp right ?

I totally agree. There's no need for more watts if you're happy with what you have. Get a good 50x2 amplifier for the components and you'll be set. Car audio is very hung up on megawatts. The fact is, for daily driving, as long as you find something that meets your needs why waste money on more? I only run 200w to my sub and never feel like I need more. Power is all personal preference. If your current amp works for you, keep it! I would definitely pick up the high pass filter. It will make your bass even more clean. New Project: 2003 Pathfinder

ok would you reccomend for me to purchase a pg tantrum 300.2 300*1 @ 4 ohms rms IF i can get it for like 120CDN or less because this amp retails for clost to 400 CDN i might buy it cuz i l ikeed when my components were poerwerd by the alpine. ? im guying buy that filter soon.