PAC Audio AP4-FD11 Specification Sheet
Advanced Amplier Interface
AP4-FD11
Introduction and Features
The AP4-FD11 provides a 6-channel pre-amp output for use with aftermarket audio equipment. Using the full range,
xed level head unit output, in conjunction with CAN messages, the AP4-FD11 delivers a variable 5v RMS pre-amp
output with fading, balance, equalization, and level control capabilities. The module also retains all audio from other
vehicle features such as factory navigation prompts, Bluetooth, SYNC, and parking sensor chimes. A data controlled
remote amplier turn on wire is also provided by the AP4-FD11. When used in conjunction with the APA-TOS1 (sold
separately), the module can provide a variable 2-channel ber optic digital audio output (TOSLINK).
Important Notes
1. This interface is only compatible in vehicles equipped with a data bus controlled premium sound system. To verify
compatibility, look for a Sony or THX badge on the door speakers, center speaker, or factory sub woofer. If none of these
brands are shown, check for the presence of a center speaker or sub woofer.
2. The factory amplier must remain connected, and in the vehicle, after the AmpPRO has been installed.
3. The remote output is rated at 2A of current. If more current is needed an external relay must be used.
4. Channels 5 and 6 are non-fading outputs. The output level of channels 5 and 6 can be controlled using the supplied level
control knob.
5. The chime volume and minimum volume levels are set to 0 dB by default. If you are happy with this level in your particular
application then additional adjustment is not required. Please refer to the Setup and Conguration section on page 2 for
more details.
6. You can only use the factory seek / track buttons to activate the chime and minimum volume adjustment in vehicles
equipped with the factory center stack radio.
7. The chime volume only controls the level of the radio button beep. This can be turned off in the radio settings menu.
8. The level control knob must be connected in order to manually adjust the chime volume and minimum volume settings.
9. The factory radio's speed controlled volume and surround sound mode are not supported by the AP4 outputs.
10. No adjustments can be made manually using the programming button, or the factory SWC when the module is connected to
a PC.
for Ford / Lincoln
Wiring Connection Chart
To Radio
AP4-FD11-HAR
Remote Turn On Output
2A Max Output
To Vehicle
Harness
Non-Fading
Level Control
Knob
1(L) 2(R) 4(R) 5(L) 6(R)3(L)
Non-FadingRearFront
To Aftermarket
Amplier
© 2017 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
PAC-audio.com
Rev. 070717
Page 1
AP4-FD11
DIP
1 2 3 4
ON
Module Layout
Feature Select
DIP switches
Interface Connector 1
Expansion Port
Programming Button
USB Connection
Installation
Set DIP switches to the ON position to activate the corresponding features.
Set DIP switches to the OFF position for any features that are not desired.
Two Channel Mode 5v / 4v Preout Troubleshooting* Troubleshooting*
1 2 3 4
* See troubleshooting section on page 4 for more details
Non-Fading Level Control
Knob Connection
Advanced Amplier Interface
TOSLINK Output
(APA-TOS1 sold separately)
Front Output
Ch. 1(L) and 2(R)
Rear Output
Ch. 3(L) and 4(R)
Non-Fading Output
Ch. 5(L) and 6(R)
for Ford / Lincoln
LED 1
LED 2
1. Remove factory radio.
2. Disconnect the 24-pin, 16-pin and 8-pin harnesses from the radio.
3. Connect the AmpPRO harnesses to the vehicle harnesses.
4. Connect the AmpPRO harnesses to the factory radio.
5. Set any feature DIP switches that apply to your install.
a. DIP switch 1 is used for two channel mode. In this mode, both the TOSLINK and front RCA outputs (1 and 2) become
non-fading outputs.
b. Set DIP switch 2 on (down) to lower the RCA output voltage to 4v. Leave DIP switch 2 off (up) to keep the RCA output
voltage at 5v. See troubleshooting section on page 5 for more details.
c. DIP switches 3 and 4 are used for additional troubleshooting. See the troubleshooting section on page 5 for more details.
6. If you are using the APA-TOS1 (sold separately) refer to the instructions included with that product for its installation.
7. Connect the AmpPRO harness to the module.
8. Connect the level control knob to the module and install in an accessible location.
9. Connect the signal cables and remote input from the aftermarket amplier.
10. Turn vehicle off, remove the key, lock the car using the factory keyfob, and let the vehicle sit for 10 minutes. This will
ensure that the vehicle data-bus goes to sleep and the AmpPRO will function as intended.
Setup and Conguration
1. Turn the ignition on. LED 1 on the interface will turn on and the +12v remote output will turn on.
2. Set the amp gain(s) to the desired level. We recommend using an oscilloscope and test tones to set the amp gain(s).
Please refer to the MECP Advanced study guide (p. 360) if you are unfamiliar with this process.
3. Check volume, balance, fade and EQ settings.
4. If you would like to adjust the chime volume or minimum volume, do so using one of the methods outlined below. If you are
happy with the default levels, no adjustments are necessary.
Manually Setting the Chime Volume
You can manually set the level of the factory chime using either the programming button on the side of the interface, or the
factory Seek/Track buttons. If you would like to set the chime volume using the PC app please proceed to the PC App section.
PLEASE NOTE: Level control knob must be connected to module for either of the following methods.
© 2017 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
PAC-audio.com
Rev. 070717
Page 2
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