Simplify amplifier installation in your Ford vehicle with this Amplifier Integration Interface by PAC. The AP4-FD21 eliminates the need for DSP and summing devices by providing a 6-channel preamp output so you can upgrade your amplifier without modifying the factory radio. This amplifier integration interface retains all audio from factory features and includes plug-and-play connections for easy installation.
Q: Is this Amplifier Integration Interface compatible with my 2016 Ford Escape?
A: Yes, this interface is compatible with select Ford vehicles equipped with 8.4” radios and Sony factory amplified audio systems, including the 2016 Ford Escape.
Q: How does the interface handle amplifier turn-on?
A: The amplifier is automatically powered on when the radio is turned on using data-controlled remote amplifier turn-on.
Q: Does this amplifier integration interface retain the factory features in my Ford?
A: Yes, this interface retains all audio from factory features, including SYNC, Bluetooth audio, safety warning chimes, parking sensor chimes, and navigation prompts.
Q: What is the purpose of the flat audio output provided by this interface?
A: The flat audio output provides a solid audio foundation for a sound system upgrade.
Q: Can I add a subwoofer to my factory sound system with this interface?
A: Yes, this interface enables subwoofer installation and allows you to adjust the sub level with the included bass knob.
Q: How does this interface simplify the installation of an amplifier?
A: This interface eliminates the need for DSP and summing devices by providing a 6-channel preamp output.
Rating 4.8 out of 5 stars with 9 reviews
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

Simplify amplifier installation in your Ford vehicle with this Amplifier Integration Interface by PAC. The AP4-FD21 eliminates the need for DSP and summing devices by providing a 6-channel preamp output so you can upgrade your amplifier without modifying the factory radio. This amplifier integration interface retains all audio from factory features and includes plug-and-play connections for easy installation.

Simplify amplifier installation in your 2018-2024 Ford vehicle with this advanced integration interface by PAC. The AP4-FD31 eliminates the need for DSP and summing devices by providing a 6-channel preamp output so you can upgrade your amplifier without modifying the factory radio. This AmpPRO interface retains all audio from factory features and includes plug-and-play connections for easy installation.

Easily add an aftermarket amplifier in your Ford vehicle without cutting or modifying the original wiring with this AmpPRO Speaker Connection Harness by PAC. The APH-FD02 allows you to save time during installation by using the factory speaker wires and providing a plug-and-play connection at the factory amplifier. This speaker connection harness works with the PAC RadioPRO integrated installation kit RPK4-FD2101 for a complete solution.
| Pros for PAC - Amplifier Integration Interface for Select Ford Vehicles with 8.4” Radio and Sony System - Black/Blue | |||
|---|---|---|---|
| Installation | There were no pros for this product— | There were no pros for this product— | Installation, Ease of use, Fit, Compatibility, Sound Quality |
| Cons for PAC - Amplifier Integration Interface for Select Ford Vehicles with 8.4” Radio and Sony System - Black/Blue | |||
| There were no cons for this product— | There were no cons for this product— | There were no cons for this product— | Polarity |