Specifications / Features:
• Model: AP4-CH41 (Revision R.2)
• Type: Amplifier integration interface / audio DSP gateway
• Application: Select 2013+ Chrysler / Dodge / Jeep / RAM vehicles (medium speed CAN bus systems)
• Compatibility: Works with vehicles equipped with factory amplified or non-amplified systems (with exceptions / compatibility caveats)
Audio Outputs / Controls:
• Provides 6-channel variable preamp (RCA) outputs for Front, Rear, and Sub channels
• RCA output level: 5 V RMS (switchable to 4 V via DIP switch)
• Channels 5 & 6 (sub outputs) are non-fading (i.e., fixed) — their level is adjusted via supplied level knob
• Retains balance, fade, bass, mid, treble, and factory EQ control (via CAN)
• Includes data-controlled remote turn-on output for aftermarket amplifiers (rated at 2 A; external relay recommended if more current needed)
Feature Retention / Integration:
• Keeps factory audio features intact: radio controls, Bluetooth, navigation prompts, warning chimes
• Supports chime volume and minimum volume adjustment
• Supports factory steering wheel controls (SWC) for volume, track, etc.
• Optional TOSLINK digital output (via APA-TOS1 add-on)
DIP Switch / Configuration Options:
• DIP 1 – Two-channel mode (routes rear chimes through front outputs)
• DIP 2 – Lower RCA voltage (5 V vs 4 V)
• DIP 3 – Not used
• DIP 4 – For non-amplified vehicles (reconfigure radio for variable output)
Installation Notes / Requirements:
• In vehicles with a factory amplifier, the amplifier must remain connected after installing the AP4
• In non-amplified vehicles, installing AP4 reconfigures the factory radio to variable output; thus you must use an aftermarket amp for cabin speakers
• Some vehicles use an Active Noise Cancellation (ANC) module that must be bypassed when using AP4 (e.g. on certain Chrysler / RAM / Jeep models)
• The level control knob must be connected to allow adjustment of chime & minimum volume
Physical / Miscellaneous:
• Module output remote turn-on rated 2 A
• Firmware / hardware revisions possible; updating firmware can resolve issues such as lockups or audio dropouts
• Included: interface module, harness, level knob, user manual
Typical Channel Routing (after installation):
• Ch 1 (L Front)
• Ch 2 (R Front)
• Ch 3 (L Rear)
• Ch 4 (R Rear)
• Ch 5 (L Sub — non-fading)
• Ch 6 (R Sub — non-fading)
