this is my friends car/install
car: 2012 Kia Optima sub: JL Audio 13W7 (sealed) amp: JL Audio 1000/1
was installed by some audio place using a loc on the rear speaker.
when they 1st installed they were getting a pop on the sub and it almost sounded like it was blown, (i sold stuff to him so i know it was good) they never adjusted the subsonic filter for the ported box and that seemed to fix it.
he was getting rid of the stuff so i bought it back, put it in a sealed box and it worked fine in my car for 6 months,
going a diffrent route now and he wanted it back so just installed it back in his car yesterday & getting a pop sound only once in a while and not on every song.
they are powering the loc from the amp`s +12, could this be the problem? i am going to run him a new pwr wire for the loc, but not sure that is the issue.
i never had that popping sound before the sale or after i got it back. (i had the sub/amp for several years)
could it be the cheap loc they used?
was thinking maybe getting him LC2i to replace it
sorry for the long post but thought that info. was useful