PAC AP4-CH41 User manual
PAC®| Ph. 866-931-8021 | [email protected]
©2016 Pacic Accessory Corporation
www.pac-audio.com
Rev. 121216 Page 1
Pacific Accessory Corporation
Amplier Integration Interface for
Chrysler / Dodge / Jeep / RAM
AP4-CH41
The AP4-CH41 provides a 6-channel pre-amp output for use with aftermarket audio equipment. Using the full range,
xed level headunit output, in conjunction with CAN messages, the AP4-CH41 delivers a variable 5v RMS (max) pre-
amp output with fading, balance, equalization, and level control capabilities. The module also retains all audio from
other vehicle features such as factory Bluetooth, uConnect, and parking sensors. A data controlled remote 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 2-channel digital ((TOSLINK,S/PDIF) audio output.
Introduction and Features
Important Notes
1. The remote output is rated at 2A of current. If more current is needed an external relay must be used.
2. 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.
3. The chime volume and minimum volume levels are set to 0 dB by default. If you are happy with these levels it is not
necessary to make any adjustments. Please refer to the Setup and Conguration section on page 2 for more details.
4. The level control knob must be connected in order to manually adjust the chime volume and minimum volume settings.
5. The factory radio's speed controlled volume and surround sound mode are not supported by the AP4 outputs.
6. When using the TOSLINK output (APA-TOS1 sold separately), all chimes must be routed through the front output using DIP
switch 1.
7. No adjustments can be made manually using the programming button, or the factory SWC when the module is connected to
a PC.
Module Layout
Wiring Connection Chart
To Aftermarket
Amplier
Non-FadingRearFront
1(L) 2(R) 4(R) 5(L) 6(R)3(L)
Remote Turn On Output
2A Max Output
AP4-CH41-HAR
To Radio To Vehicle
Harness
Non-Fading
Level Control
Knob
Interface Connector 1
Expansion Port
Programming Button
Feature Select
DIP switches
Non-Fading Level Control
Knob Connection
USB Connection
LED 1
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
PAC®| Ph. 866-931-8021 | [email protected]
©2016 Pacic Accessory Corporation
www.pac-audio.com
Rev. 121216 Page 2
Pacific Accessory Corporation
Amplier Integration Interface for
Chrysler / Dodge / Jeep / RAM
AP4-CH41
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 oscilliscope 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 SWC. If you would like to set the chime volume using the PC app please proceed to the PC App section on page 4.
PLEASE NOTE: Knob must be connected to module for either of the following methods.
Setting the chime volume using the programming button
1. Start with the level control knob turned all the way down (counter-clockwise).
2. Press the programming button on the side of the interface.
3. LED 1 will turn green and the chimes will begin continuously beeping.
4. Turn the level control knob clockwise until the desired chime level is reached.
5. You can now either press the programming button twice or wait ten seconds to exit the settings.
Setting the chime volume using the factory SWC
1. Start with the level control knob turned all the way down.
2. Press and hold the track down button on the factory SWC (Back left of steering wheel) for approximately ten seconds.
PLEASE NOTE: The radio will respond to the SWC commands during this process, this is normal and has no effect on the
AP4 operation.
3. LED 1 will turn green and the chimes will begin continuously beeping.
4. Turn the level control knob clockwise until the desired chime level is reached.
5. You can now either press the programming button twice or wait ten seconds to exit the settings.
Installation
1. Remove factory radio.
2. Disconnect the main 52-pin factory harness from radio.
3. Connect AmpPRO harness to vehicle harnesss.
4. Connect AmpPRO pro harness to factory radio.
5. Set any feature DIP switches that apply to your install.
a.Set DIP switch 1 on (down) to send all rear parking sensor chimes through the front channel. This should be used when
the vehicle is equipped with rear parking sensors and you are either using the TOSLINK output, or running all cabin
speakers off of the front outputs of the AP4.
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 3 for more details.
c. DIP switches 3 and 4 are not used.
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.
DIP
1 2 3 4
ON
Rear Chime Path 5v / 4v Preout No Function No Function
1 2 3 4
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.
PAC®| Ph. 866-931-8021 | [email protected]
©2016 Pacic Accessory Corporation
www.pac-audio.com
Rev. 121216 Page 3
Pacific Accessory Corporation
Amplier Integration Interface for
Chrysler / Dodge / Jeep / RAM
AP4-CH41
Restoring Factory Settings
You can restore the interface to factory default settings by pressing and holding the programming button on the side of the module
until the status LEDs start blinking red. Once the LEDs start blinking red, release the button.
This reset will restore the following settings to their factory defaults:
• Chime volume level
• Enable / Disable Factory Chimes
• Minimum volume level
• Enable / Disable factory EQ
• Factory EQ frequency
• Factory EQ Q factor
Testing and Verication (cont)
Manually Setting the Minimum Volume
If the minimum volume of the radio (factory radio volume level 1) is too loud, you can manually set the level of the minimum
volume using either the programming button on the side of the interface or the factory SWC. If you would like to set the
minimum volume using the AmpPRO app, please proceed to the AmpPRO App section on page 4.
PLEASE NOTE: Level control knob must be connected to module for either of the following methods.
Setting the minimum volume using the programming button
1. Start with the level control knob turned all the way down (counter-clockwise).
2. Set the amp gains to the desired level.
3. Set the volume on the factory radio to 1.
4. Press the programming button on the side of the interface twice.
5. LED 1 will turn amber and the chimes will begin beeping every ve seconds.
6. Turn the level control knob clockwise until the desired minimum volume level is reached.
7. You can now either press the programming button once or wait ten seconds to exit the settings.
Setting the minimum volume using the factory SWC
1. Start with the level control knob turned all the way down (counter-clockwise).
2. Set the amp gains to the desired level.
3. Set the volume on the factory radio to 1.
4. Press and hold the track up button on the factory SWC (Back left of steering wheel) for approximately ten seconds.
PLEASE NOTE: The radio will respond to the SWC commands during this process, this is normal and has no effect on the
AP4 operation.
5. LED 1 will turn amber and the chimes will begin beeping every ve seconds.
6. Turn the level control knob clockwise until the desired minimum volume level is reached.
7. You can now either press the programming button once or wait ten seconds to exit the settings.
Troubleshooting
1. Hiss at high amp gain - Set feature DIP switch 2 to the on (down) position to lower the output voltage of the AP4 to 4v. If you
still hear the hiss, lower your amp gains until the hiss is gone.
2. Cannot hear uConnect or nav voice - Use the volume knob while either of these voice prompts are active to adjust voice
volume. If you still do not hear voice prompts, be sure that the 10 pin connector is plugged in behind the radio.
3. Cannot hear chimes - Set chime volume using process outlined in Setup and Conguration or using the AmpPRO application.
If you still do not hear chimes, be sure that you are using the remote output from the AP4 to turn on your aftermarket amplier.
4. Low volume setting on radio is too loud - Set minimum volume using process outlined in Setup and Conguration or using the
Amp PRO application.
Action / Color During Normal Operation
Solid Red Module Active
Solid Green Chime Volume Adjustment Mode
Solid Amber Minimum Volume Adjustment Mode
Rapid Blink Any Color DSP Activity
LED2 Blink Amber USB Connection Detected
LED Legend
LED 1
PAC®| Ph. 866-931-8021 | [email protected]
©2016 Pacic Accessory Corporation
www.pac-audio.com
Rev. 121216 Page 4
Pacific Accessory Corporation
Amplier Integration Interface for
Chrysler / Dodge / Jeep / RAM
AP4-CH41
AmpPRO App
Use of the AmpPRO App allows
you to do the following:
• Congure User Interface Options such
as:
• Minimum Volume Level
• Chime Volume Level
• Enable / Disable AP4 Chimes
• Enable / Disable factory EQ
• Bass / Mid / Treble boost
frequencies and Q factor
• Update Product Firmware
• Read Firmware / Hardware Versions
PLEASE NOTE: These settings can be adjusted with the module installed in the vehicle, or on the bench. However, it is
recomended to make the adjustments with the module installed, and the factory radio on, so that the changes can be
heard.
Minimum Volume Level - This allows you to set the minimum volume level of the factory radio (factory radio volume level 1)
Chime Volume Level - This allows you to set the volume of the AP4 chimes (ie: park sensors).
Front / Rear Chimes Enabled - This allows you to enable/disable AP4 chimes (ie: park sensors). This is used when mixing
factory and aftermarket speakers.
3 Band EQ Enabled - This allows you to enable / disable the 3 band factory EQ.
Bass / Mid / Treble Freq / Q Factor - This allows you to set the center frequency that will be adjusted when setting the 3 band
factory EQ, as well as the Q Factor for each frequency. The Q Factor determines how many of the adjacent frequencies will be
affected when adjusting the selected frequency. The lower the Q Factor, the more frequencies will be affected.
60HZ 500HZ 7.5KHZ
80HZ 1KHZ 10KHZ
100HZ 1.5KHZ 12.5KHZ
120HZ 2.5KHZ 15KHZ
0.50 0.75
1.00 1.00
1.50 1.25
2.00 1.50
Bass Frequency Mid Frequency Treble Frequency
Available Frequencies and Q Factors
Bass Q Factor Mid Q Factor Treble Q Factor 0.75
1.25
PAC®| Ph. 866-931-8021 | [email protected]
©2016 Pacic Accessory Corporation
www.pac-audio.com
Rev. 121216 Page 5
Pacific Accessory Corporation
Amplier Integration Interface for
Chrysler / Dodge / Jeep / RAM
AP4-CH41
AmpPRO App (cont.)
Firmware Updates
The AmpPRO app will also allow you to update the interface with new rmware as it becomes available. Please visit www.pac-
audio.com or contact our tech support department to see if there is a rmware update for your interface.
Connect the interface to your PC and select "Firmware", then “Update Firmware”. Now select “Select File”. Finally, browse to the
place where you saved the le and select it. This will begin the updating process. Once nished, disconnect the interface from
the PC and resume normal operation.
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