PAC AP4-CH21 User Manual

AP4-CH21
Introduction and Features
The AP4-CH21 provides a 6-channel pre-amp output for use with aftermarket audio equipment. Using the full range,
fixed level head unit output, in conjunction with CAN messages, the AP4-CH21 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, and uConnect. A data controlled remote amplifier
turn on wire is also provided by the AP4-CH21. When used in conjunction with the APA-TOS1 (sold separately), the
module can provide a variable 2-channel fiber 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 an Alpine, Beats, or Harmon Kardon badge on the door speakers, center speaker, or factory
subwoofer. If none of these brands are shown, check for the presence of a center speaker or subwoofer.
2. The factory amplifier 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 minimum volume level is 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 Configuration section on page 2 for more details.
6. The level control knob must be connected in order to manually adjust the minimum volume setting.
7. No adjustments can be made manually using the programming button, or the factory SWC when the module is connected to
a PC.
Wiring Connection Chart
AP4-CH21-HAR
To Radio
Module Layout
Interface Connector 1
Expansion Port
Programming Button
USB Connection
Pacific Accessory Corporation
Remote Turn On Output
2A Max Output
To Vehicle
Harness
Feature Select
DIP switches
Non-Fading Level Control
Knob Connection
PAC | Ph. 866-931-8021 | support@pac-audio.com
®
©2017 PAC | PAC is a Power Brand of AAMP Global
Advanced Amplifier Interface for
Non-Fading
Level Control
Knob
TOSLINK Output
(APA-TOS1 sold separately)
Front Output
Ch. 1(L) and 2(R)
Rear Output
Ch. 3(L) and 4(R)
www.pac-audio.com
Chrysler / Dodge / Jeep
1(L) 2(R) 3(L) 4(R) 5(L) 6(R)
Front Rear Non-Fading
To Aftermarket
LED 2
Non-Fading Output
Ch. 5(L) and 6(R)
Rev. 020717
Ampli er
LED 1
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