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PAC - Amplifier Integration Interface for Select Ford Vehicles with 8.4” Radio and Sony System - Black/Blue

Product Features | Product Description | Product Details | Customer Reviews | Included Items | Similar Products
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Product Features

  • Compatible with select Ford vehicles equipped with 8.4” radios and Sony factory amplified audio systems Including 2015-2018 Edge, 2016 Escape, 2015-2017 Expedition, 2011-2018 Explorer, 2013-2017 F-150, 2013-2019 F-250, and 2013-2019 F-350 models.
  • Also compatible with 2013-2019 F-450, 2013-2019 F-550, 2012-2017 Focus, 2013-2016 Fusion, 2019-2020 Mustang, and 2013-2015 Taurus models for a customized fit.
  • Variable 5V RMS front, rear, and sub preamp outputs Features fading, balance, equalization, and level control capabilities.
  • Customized OE bass, mid, and treble center frequency selection Allows precision tuning.
  • Provides flat audio output For a solid audio foundation.
  • Retains audio from factory features Including SYNC, Bluetooth audio, safety warning chimes, parking sensor chimes, and navigation prompts.
  • Data-controlled remote amplifier turn-on Automatically powers the amplifier when the radio is turned on.
  • Enables subwoofer installation Allows you to add a subwoofer to the factory sound system and adjust sublevel with the included bass knob.
  • Optional TOSLINK optical output Provides a variable 2-channel fiber optic digital audio output when used in conjunction with APA-TOS1 (sold separately).
  • Plug-and-play installation For quick and easy setup.

Product Description

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.

Product Details

Manufacturer PAC Model Number AP4-FD21
SKU 5981701 UPC 609098817042
Color Black/Blue Model Number AP4-FD21
Vehicle Compatibility Select 2011-2020 Ford vehicles equipped with 8.4" radios and Sony factory amplified audio systems Manufacturer's Warranty - Labor None
Color Category Multi Function(s) Retained SYNC, Bluetooth audio, safety warning chimes, parking sensor chimes, navigation prompts
Product Name Amplifier Integration Interface for Select Ford Vehicles with 8.4” Radio and Sony System Manufacturer's Warranty - Parts 1 year
Wireless No Brand PAC
Color Black/Blue USB Port(s) Yes
Digital False Pre-Owned False
Shipping Weight 1.25 Warranty Labor None
Warranty Parts 1 year Type HardGood

Customer Reviews

Customer Top Rated: False


4/21/2023 12:25:03 PM

2016 Fusion Titanium W/Sony

I first tried using a Audio Control LCI6I but it just didnt sound good at all and it had a noticeable hiss and the sound it produced was just lacking and man I was so dissapointed , So I wanted to try this PAC interface and luckily it was a deal of the day for $159 when I got it which made the decision easy. So I have had this installed for 1 year in my 2016 Fusion Titanium for little over a year and its running a 4 channel 100w RMS amp to Alpine Type R 6.5 components in front door and Type R 6x9s in rear deck and also 2 Rockville powered subs under front seats, the factory Sony amp is still running the rear door speakers and the center dash speaker, and it does what it says BUT 2 things I don't like are.. It says 4V or 5V pre-out but there's no way when compared to a aftermarket deck as I had exact same speakers and amps in a 2011 Fusion with a aftermarket Sony (2V pre-out) and a Pioneer (4V pre-out) deck and the volume at same amp gain was lot less than on my current 16 Fusion, the amp gains had to be turned up lot more to get near that volume. It also has a minor hiss when you have the stereo turned real low or in between songs etc.. but you don't notice it when playing music. Also its not this interfaces problem but the Sony deck doesn't put out great sound compared to an aftermarket deck but I didn't think it would, but it is something else that's noticeable. I do like that it has the 3 band EQ settings you can change and also that I haven't had ANY issues with it since installing it a year ago. And it bypasses the bass roll-off as far as I can tell and from what I read. If you want to run amps and subs then this is the best Interface or way to do it in my opinion and I am glad I got it instead of the AudioControl LCI6I or by using a speaker level to RCS convertor.


10/25/2022 12:16:21 AM

Ford harness 2016 with sony sound system

This was about the only harness that works ahd makes it sound good , excellent product. but very pricey


7/30/2021 3:23:19 PM

PAC Harness

Worked just the way I needed it too! Love the way PAC products work with your factory vehicle.


3/5/2021 3:18:09 PM

Pac amp

Makes adding amp to my truck so much easier great product and very easy to install


10/30/2020 2:44:40 PM


There is a small noise with the volume all the way down


5/30/2020 11:55:39 AM

Works great

Got this for me 2015 F-150 with the Sony system. Did exactly what it said it would and allowed me to integrate my 2 maps so I could finally install my system. I picked up the optional tos link so I could run optical to my dsp. No noise no matter where the dial is. Completely happy


4/20/2020 8:15:28 AM

2018 Focus RS

Works with the 2018 Focus RS' "premium" Sony system. Simple plug and play. Make sure to test if system turns on before screwing everything in the deck back in. It is the most expensive option out there to obtain an amplifier remote and audio-out but it is a clean install with NO impact to OEM system.


7/12/2019 8:38:02 PM

Great product

It was easy to install, i Installed it my self and works great, is a bit pricey but worth it

Included Items

  • PAC Amplifier Integration Interface for Select Ford Vehicles with 8.4” Radio and Sony System
  • Wiring harness
  • Bass knob
  • Knob harness
  • Installation guide