Axxess AXSUB-FD1 Add-A-Sub Data Interface for Select Ford Vehicles Upgrade your factory audio system with richer, more dynamic bass using the Axxess AXSUB-FD1 Add-A-Sub Data Interface. Designed for select 2011-2017 Ford vehicles with non-amplified factory audio systems, this vehicle-specific interface provides a simple plug-and-play solution for adding an aftermarket subwoofer and amplifier while retaining the factory radio and its original functionality. The AXSUB-FD1 utilizes Axxess Add-A-Sub™ technology to extract a dedicated low-frequency signal from the factory audio system without replacing the original radio. It features a 2-channel non-fading 5V RMS output with a fixed 234Hz low-pass crossover, delivering a clean, optimized bass signal for an aftermarket subwoofer amplifier while maintaining the performance of the factory speakers. Installation is quick and straightforward using the included vehicle-specific T-harness, allowing the interface to connect directly at the radio location without cutting or modifying factory wiring. A dash-mountable bass level control knob is included, providing convenient adjustment of subwoofer output from the driver's seat. The AXSUB-FD1 also features a 250mA remote turn-on output to activate an aftermarket amplifier and includes Micro-B USB update capability for future firmware updates and expanded compatibility with supported vehicles. Before purchasing, vehicle compatibility should always be verified. The AXSUB-FD1 is designed for select 2011-2017 Ford vehicles equipped with compatible non-amplified factory audio systems, including many Ford cars, trucks, and SUVs. Whether adding a powered subwoofer, improving factory bass response, or building a custom sound system, the Axxess AXSUB-FD1 provides a clean, reliable, and professional solution for integrating aftermarket bass while retaining the factory radio. Key Features Vehicle-specific Ford Add-A-Sub™ interface Designed for select 2011-2017 Ford vehicles Designed for non-amplified factory audio systems Adds an aftermarket subwoofer while retaining the factory radio 2-channel non-fading 5V RMS output Fixed 234Hz low-pass crossover 250mA remote turn-on output Includes dash-mountable bass level control knob Vehicle-specific plug-and-play T-harness included Installation performed at the radio location Micro-B USB update capability Maintains factory radio operation while adding aftermarket bass Includes: AXSUB-FD1 interface Vehicle-specific T-harness Bass control knob Ideal for factory audio system bass upgrades