Hi, been on the forum for awhile, never posted before.
My question is, im adding an additional amplifier and subwoofer using a line out converter.
How would i got about routing the power cable of the amplifier through the firewall or to the battery or vice versa.
I have a 2009 azera limited with the 3.8

Please help as i would like to finish this add on within the week.
Please respond or PM me