JL W7 problems/new install?

Question

Two questions...

First: Currently I haven one 12W7 running with the JL 500/1 and sometimes it fades in and out (hits harder then softer) I keep hearing this could be because when it was installed the ground wiring wasn't done right?

Second: I am in the process of putting in another W7 with 2 alpine MR 1000 and a secondary battery.....different alternator needed??

Car is a 2006 ford explorer

Answer 1

If you already have issues with the sub output fading in and out playing the same bass note, you have power voltage issues.  The JL 500/1 should be wired with 4 gauge power & ground wires.  Make sure of this first before going any further.

With the additional strain of the new amps you're planning, you definitely will need to upgrade your alternator.

Answer 2

sounds like you need a better alternator/battery think that should solve your probs.

owner of jl dub 7's and former employee of a stereo shop