Jl 12's w3 not all types of basses sound right

Signal getting to and from the Amp is problematic, if you do not have the correct wiring that will carry the necessary power then you are never going to get the sound you are looking for. Start with testing the AMP and then Wires....

i have the same problem.it is not worth for money

I have a similar problem with my 2012 civic, I hooked up my 1800w kenwood mp to my 2 12" w6s and 1 song plays and sounds great, the rest of my songs have no bass from the subs, just the car speakers sound normal so I dont know what the hell thats all about. I thought it was a wiring issue but I can play the one song all day and it sounds perfect so any suggestions? thanks in advance

here is a manual for your subwoofers: http://mobile.jlaudio.com/pdfs/8-12W6_BDS.pdf

use the wiring diagram for 1.5? (1.5ohm) with 2 speakers. the diagram for 3 speakers will not work, because it would bring the load down to 1 ohm, and the amp cannot go below 1.5 ohm.

to set up the amp:

under "preamp output section", on the "output mode" switch, select "amp filter"

to set up the levels: start with the amp gain pretty far down- with the input voltage on low for line level outputs from the deck, and on high for speaker outputs from the deck. now turn your cd deck as far up as it will go until it distorts, then turn the cd deck down to just where it stops distorting. now, you can start to turn up the gain on the amp.

on the filters, youll prolly want the cutoff filter around 100hz @ 24db slope. start with the infrasonic filters off, but, if you do get into them, try centering between 30 and 60hz on either, and, possibly dropping the cutoff filter to 80hz.

well start with. turn your hi pass completely off. Turn your bass boost completely off. Turn your input gain copletely down. and turn your cd player to about 3/4 of what you listen to it at. Then turn your input up until it starts to sound a little dirty(distortion) then turn it down a notch. set it at a 80 herz filter so it allows nothing over 80 herz to come through. I just installed one of these jl amps a week ago. 1400.1 and it made two kicker cvt's sound amazing just have to set it just exactly like i told you. it will hit tight as hell and loud and it will hit all frequencies way better.

250 watts rms seems a little low for a 12 inch woofer, a 500 or higher will likely fix your problem. Specific model numbers and the type of enclosure you have will allow a more specific answer.

rewire the whole system with new wires,you could have a bad ground or wire try it first if that dont work rewire

Hello highs31 Ok this is a common problem and the fix is quite easy. even though you may not want to hear it. Here it goes: Your amplifier is drawing more current then your alternator can put out and more then your voltage regulator can control. This means that you must and I repeat must add another battery, alternator, and voltage regulator for your sound system. adding these components will eliminate your problems. That is the long and the short of it. I hope this helps, Thank you, Shuttle83

could be low current ,disconnect all power including ground for 20min N.B most amps will seem to be shorted at output but this is normal due to damping ratio.