In my '08 I went to the Boston amp and tapped the REAR speaker level outs to feed a LOC (can go direct to high level inputs on your amp) and then to a JL 250/1 for the stealthbox. I also used the factory amp bracket bolt as a grounding point for my amp. Never had an issue with the stereo in the 7 years I owned my WK (from new).
Sent from my iPhone using JeepGarage
2015 Altitude - Billet Silver
SRT Springs, Taillight Bezels, Red Start Button, Pedals & Grille Mesh, Black Lugs,
Mopar 4" Chrome exhaust tips, 1.25" Bora Wheel Spacers, DDM 5500k HID,
Red LED 3157 Bulbs, 15% Tint, Polk DB Center Channel, Mopar All Weather Mats