Ram 2500 line output converter issues

[Xswizy]

I recently installed a subwoofer under the rear seat of my 2021 ram 2500 big horn and decided to use a LOC to tap into the b pillar for my sound. I used left and right + and - to tap onto the B pillar on the passenger side for right and left RCA. Everything works, but there’s one issue. I can tell the door speaker cuts in and out and it makes the subwoofer cut in and out as well. I’ve tried different splices and checking my connections over and over. Any help would be appreciated.