2018 Dodge Charger The huge Rockford amp provides the JL Audio subwoofer with plenty of power. The custom trim for the enclosure turned out great. The PAC Audio interface allowed us to retain the factory radio while still getting a clean audio signal. The VXi amplifier was positioned underneath the big Rockford amplifier. An auxillary battery was added to the trunk. The ported enclosure was first constructed, then the trim piece was fabricated. The two color trim piece helps to cosmetically integrate the enclosure to the trunk. Foam rings were used on the door speakers to seal their output to the cabin. The rear speakers were upgraded with JL Audio C2 triaxials. Our fabricators created mounting adapters for the Audiofrog tweeters.