PAC Audio AP4-FD21 AmpPRO 4 Amplifier Integration Interface – Factory audio upgrade for Ford vehicles.
AP4-FD21 AmpPRO 4 interface diagram showcasing pre-amp outputs and subwoofer control.
Rear view of PAC AP4-FD21 with plug-and-play harness for easy installation.

PAC Audio AP4 FD21 AmpPRO 4 Amplifier Integration Interface

PAC Audio AP4-FD21 AmpPRO 4 Amplifier Integration Interface – Factory audio upgrade for Ford vehicles.

PAC Audio AP4 FD21 AmpPRO 4 Amplifier Integration Interface

$0.00
Product description

PAC Audio AP4-FD21 AmpPRO 4 – Seamless Ford Amplifier Integration

The PAC Audio AP4-FD21 AmpPRO 4 Amplifier Integration Interface is the ultimate solution for integrating aftermarket amplifiers into select 2011-2020 Ford vehicles equipped with a Sony factory amplified audio system. Designed to enhance your vehicle’s sound system while retaining all factory functions, this plug-and-play interface delivers clean, powerful pre-amp outputs, eliminating the need for complex rewiring or signal summing devices.


🔊 Key Features & Benefits

✔️ Seamless Factory Integration – Retains full functionality of SYNC, Bluetooth audio, navigation prompts, warning chimes, and volume controls
✔️ 6-Channel Pre-Amp Outputs – Provides front, rear, and subwoofer RCA outputs for clean, high-quality sound to aftermarket amplifiers
✔️ High-Voltage RCA Outputs – Adjustable 5V RMS signal ensures a strong, noise-free connection to your amp
✔️ Dedicated Subwoofer Control – Includes a bass level knob for easy subwoofer adjustment on the fly
✔️ Plug-and-Play InstallationNo factory radio modifications required; retains OEM wiring for quick, secure setup
✔️ Optional Digital Output – Supports a TOSLINK optical output with the APA-TOS1 adapter (sold separately) for digital sound processing


🚗 Vehicle Compatibility

The AP4-FD21 works with select Ford vehicles (2011-2020) equipped with Sony premium audio systems, including:

  • Ford Edge (2015-2018)
  • Ford Escape (2016)
  • Ford Expedition (2015-2017)
  • Ford Explorer (2011-2018)
  • Ford F-150 (2013-2017)
  • Ford F-250 & F-350 (2013-2019)
  • Ford Focus (2012-2017)
  • Ford Fusion (2013-2016)
  • Ford Mustang (2019-2020)
  • Ford Taurus (2013-2015)

🔹 Check with PAC Audio for full vehicle compatibility before purchase.


🎵 Why Choose the PAC Audio AP4-FD21?

✔️ Upgrades Your Audio Without Losing Factory Features
✔️ Delivers Clean, High-Quality Sound for Aftermarket Amps
✔️ Avoids the Need for Complicated DSPs or Summing Devices
✔️ Designed Specifically for Sony Factory Amplified Systems
✔️ Trusted PAC Audio Technology for Reliable Performance

💡 Looking to upgrade your Ford’s sound system? The AP4-FD21 ensures a hassle-free, high-performance integration!


🛒 Buy the PAC Audio AP4-FD21 AmpPRO 4 Today!

Upgrade your Ford's factory sound system with the PAC Audio AP4-FD21 for uncompromised audio clarity and seamless amplifier integration. Shop online now for fast shipping or visit us for professional installation!

📞 Call (440) 525-2001 or Order Online Today!

🚀 Better Sound Starts Here – Experience High-Performance Audio Now!


SEO Optimization for Google Search Rankings

Primary Keyword Placement – "PAC Audio AP4-FD21 AmpPRO 4 Amplifier Integration Interface" is placed in the title, first sentence, and multiple sections
Long-Tail Keyword Integration – "Best amplifier interface for Ford," "PAC AmpPRO 4 installation," "Ford Sony audio upgrade," "aftermarket amp for Ford"
Google Featured Snippet Targeting – Bullet points & structured formatting improve chances of appearing in Google’s Featured Snippets
E-Commerce & Local SEO Strategy – Includes "Buy Online," "Fast Shipping," and "Professional Installation Available" for search optimization
Engaging, Conversion-Optimized CTAsEncourages users to purchase, call, or visit for installation

Shipping & Return

Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price.

We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.