2011-2019 FORD VEHICLES EQUIPPED WITH 8.4 SONY SYSTEM PLUG & PLAY UPGRADE FOR ADDING A AFTERMARKET SUB AMP

ONLY FOR VEHICLES WITH THE  SONY BADGE SYSTEM WITH FACTORY SUBWOOFFER     PAC APSUB-FD21 AmpPRO SUB Wiring Interface Add an aftermarket amp and sub to the factory system in select 2011-20 Ford vehicles with premium sound systems .// PAC APSUB-FD21 Modern cars often make it tough to add a subwoofer to your audio system. PAC's APSUB-FD21 interface allows you to add an amp and sub to the factory premium system in your Ford vehicle. The package includes an amp installation module, a Ford-specific harness, and a wired remote. The vehicle-specific wiring harness connects the amp module to the factory databus and supplies an unequalized 5-volt preamp signal for your sub amp. The interface also allows you to select a center frequency to boost or cut to tailor bass response to your personal preference.  This package also includes a wired remote control for adjusting your sub's level. You'll be able to upgrade your bass response with a minimum of fuss while retaining the functi