PAC Audio AP4-CH41 (R.2) Instruction Manual
Advanced Amplier Interface for
AP4-CH41 (R.2)
Introduction and Features
The AP4-CH41 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-CH41 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, uConnect, and parking sensor chimes. A data controlled remote
amplier turn on wire is also provided by the AP4-CH41. When used in conjunction with the APA-TOS1 (sold separately),
the module can provide a variable, stereo, digital audio signal over ber optic (TOSLINK).
Important Notes
1. These instructions only apply to R.2.1.3.15 or later revisions of the AP4-CH41
2. Compatible with both amplied and non-amplied factory systems.
• Amplied Vehicles
• Compatible with all data-bus controlled amplied systems, no matter the screen size (including the 12" screen). To identify
these systems, look for logos on door speakers, tweeters, dash speakers or the subwoofer to conrm if the vehicle has an
amplied system (Alpine, Beats or Harman Kardon). Some vehicles may not always have branded systems. Unbranded
amplied systems are generally identied by locating a center channel speaker or subwoofer.
• Non-Amplied Vehicles
• Jeep Wrangler: Compatible with all screen sizes (5”, 7”, and 8”).
• All other models: Only compatible in vehicles equipped with the 7” or 8” screen. Vehicles equipped with the 5” screen
are not compatible.
• If you are installing the AmpPRO in a vehicle that is not equipped with a factory amplier, you must add an amplier to
the vehicle's speakers, as the factory radio will no longer have a 4 channel variable output after it has been re-congured
by the AmpPRO. For example, you can not add only a subwoofer to a non-amplied vehicle, as the radio will no longer
power the cabin speakers properly.
• Non-amplied vehicles equipped with an Active Noise Cancellation (ANC) system require the ANC module to be bypassed.
This can be done manually or with the ANC bypass harness ANC-CH01. The following vehicles have an ANC module
that needs to be bypassed:
• 2019 RAM Truck
• 2017-2019 Pacica
3. If a factory amplier is present, it must remain connected and in the vehicle after the Amp PRO has been installed.
4. The remote output is rated at 2A of current. If more current is needed, an external relay must be used.
5. 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.
6. 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, additional adjustment is not required. Please refer to the Setup and Conguration section on page 2 for more details.
7. The level control knob must be connected in order to manually adjust the chime volume and minimum volume settings.
8. The factory radio's speed controlled volume and surround sound mode are not supported by the AP4 outputs.
9. When using the TOSLINK output (APA-TOS1 sold separately), DIP switch 1 must be on in order for all warning chimes to be
heard through the sound system (see page 2 for details).
10. No adjustments can be made manually using the programming button, or the factory SWC, when the module is connected to
a PC.
Chrysler / Dodge / Jeep / RAM
Module Layout
Interface Connector 1
Expansion Port
Programming Button
USB Connection
Feature Select
DIP switches
Non-Fading Level Control
Knob Connection
© 2019 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
PAC-audio.com
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)
LED 2
Rev. V12
Date:092019
LED 1
Page 1
AP4-CH41 (R.2)
DIP
1 2 3 4
ON
Wiring Connection Chart
Advanced Amplier Interface for
Chrysler / Dodge / Jeep / RAM
Remote Turn On Output
2A Max Output
To Radio
Factory Speaker
Connection Point
Factory Speaker
Connection Harness
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
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 No Function Non-Amplied Vehicles
1 2 3 4
1. Remove factory radio.
2. Disconnect the main 52-pin factory harness from radio.
3. Connect AmpPRO harness to vehicle harness.
4. Connect AmpPRO harness to factory radio.
5. If you are using the AmpPRO in a vehicle with no factory amplier, connect the aftermarket amplier's speaker outputs to the
provided harness. If the vehicle has a factory amplifer, disconnect the harness with the loose speaker leads and connect it
to the matching plug on the AP4 harness.
6. Set any feature DIP switches that apply to your install.
a. Set DIP switch 1 on (down) to activate two channel mode. In this mode, both the TOSLINK and front RCA outputs (1 and
2) become non-fading outputs. All rear chimes will also be routed through these outputs in two channel mode.
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 switch 3 is not used.
d. DIP switch 4 is for vehicles without a factory amplier. Set DIP switch 4 on (down) to recongure the radio for proper
communication with the AmpPRO. If you set this DIP switch on, once you connect the AmpPRO to the vehicle you
must do two full sleep cycles to recongure the radio. To do a sleep cycle, make sure the vehicle ignition is off,
close all doors, trunk and/or tailgate, lock the vehicle with the keyfob and let it sit for at least ve minutes. To
wake the vehicle back up, unlock the doors, turn on the ignition, and wait for the radio to come on. After two sleep
cycles the radio will be congured for a factory amplier and ready for use with the AP4. This can be veried by turning the
vehicle on, powering up the radio, and rolling the volume knob. If the radio is congured properly, LED 1 will ash rapidly
when the volume knob is turned.
7. If you are using the APA-TOS1 (sold separately) refer to the instructions included with that product for its installation.
8. Connect the AmpPRO harness to the module.
9. Connect the level control knob to the module and install in an accessible location.
10. Connect the signal cables and remote input from the aftermarket amplier.
© 2019 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
PAC-audio.com
Rev. V12
Date:092019
Page 2
Loading...