AAMP Global PAC AP4-CH21 User Manual

PAC
®
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©2017 PAC | PAC is a Power Brand of AAMP Global
www.pac-audio.com
Rev. 020717
Page 1
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AP4-CH21
The AP4-CH21 provides a 6-channel pre-amp output for use with aftermarket audio equipment. Using the full range,
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Introduction and Features
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.
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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
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6. The level control knob must be connected in order to manually adjust the minimum volume setting.
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To Aftermarket
Amplier
Non-FadingRearFront
1(L) 2(R) 4(R) 5(L) 6(R)3(L)
Remote Turn On Output
2A Max Output
AP4-CH21-HAR
To Radio
To Vehicle
Harness
Non-Fading
Level Control
Knob
Module Layout
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

AAMP Global PAC AP4-CH21 Specifications

General

Channels	4
Frequency Response	20Hz - 20kHz
Steering Wheel Control	Yes
Amplifier Turn-On	Yes
Navigation Outputs	Yes
Retained Accessory Power (RAP)	Yes
Color	Black
Compatibility	Chrysler vehicles
Input Voltage	12V
Connector Type	OEM Specific

Summary

AP4-CH21 Introduction and Features

Product Overview

Details the AP4-CH21's 6-channel pre-amp output, variable 5v RMS output, and retention of vehicle audio features.

Important Notes and Warnings

Compatibility and Installation Notes

Covers compatibility verification, factory amplifier connection, remote output limits, and specific channel behavior.

Wiring and Module Layout

Wiring Connection Chart

Diagram illustrating connections for radio, vehicle harness, amplifier, and non-fading level control knob.

Module Layout Overview

Identifies key components on the module, including DIP switches, connectors, buttons, and output channels.

AP4-CH21 Installation Guide

Installation Steps

Covers removing the factory radio, connecting harnesses, setting DIP switches, and connecting the level control knob.

Setting Minimum Volume via Programming Button

Procedure for manually adjusting minimum volume using the module's programming button and level control knob.

Setting Minimum Volume via Factory SWC

Procedure for manually adjusting minimum volume using the vehicle's factory steering wheel controls and level control knob.

AmpPRO PC App Configuration

App Features Overview

Lists capabilities including user interface options, firmware updates, and version checks for the AP4-CH21.

User Interface Options

Configure minimum volume, enable/disable factory EQ, and set EQ frequencies/Q factors via the AmpPRO PC application.

AP4-CH21 Firmware Updates and Troubleshooting

Firmware Update Procedure

Steps to connect the interface to a PC and update its firmware using the AmpPRO application.

Restoring Factory Settings

Instructions to reset the interface to factory default settings by holding the programming button.

Troubleshooting Common Issues

Addresses hiss, inaudible prompts, loud minimum volume, and unresponsive module behavior with solutions.

LED Status Legend

Explanation of LED indicators and their corresponding actions or states during normal operation and specific modes.