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PAC AmpPRO AP4-CH31 Aftermarket Amplifier Interface Allows seamless addition of an amplifier in select 2010-up Chrysler-made vehicles

Item # 541AP4CH31

You can make a less-than-ideal factory system actually sound premium by upgrading the weak factory amplifier with a...

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You can make a less-than-ideal factory system actually sound premium by upgrading the weak factory amplifier with a...

Item # 541AP4CH31

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C$440.99

About the PAC AmpPRO AP4-CH31 Aftermarket Amplifier Interface

Buck Pomerantz

Your amp will sound better than the factory system

You can make a less-than-ideal factory system actually sound premium by upgrading the weak factory amplifier with a more powerful aftermarket amp. PAC's AmpPRO interface consists of a module and a vehicle-specific T-harness that make the job much easier. Now, you can install an amplifier of your own without losing any of your vehicle's factory audio features like warning chimes, navigation prompts, and Bluetooth® functions.

Your amp will sound better than the factory system

You can make a less-than-ideal factory system actually sound premium by upgrading the weak factory amplifier with a more powerful aftermarket amp. PAC's AmpPRO interface consists of a module and a vehicle-specific T-harness that make the job much easier. Now, you can install an amplifier of your own without losing any of your vehicle's factory audio features like warning chimes, navigation prompts, and Bluetooth® functions.

Simple to install

The package's T-harness plugs into the factory radio and vehicle harness. The small module fits behind the dash, converting your radio's speaker outputs into six preamp-level outputs ready for connection to your amp. The factory amplifier needs to be left connected in the vehicle. The factory radio controls, such as volume, balance, and fade, will work as before for your front and rear speakers. A separate wired remote level control lets you adjust the volume of the subwoofer channels from your front seat. An optional add-on module, PAC's APA-TOS1 adapter, provides an optical digital output for your high-end digital processors and amplifiers to handle.

An app for tweakers

After downloading the AmpPRO PC App and connecting to your Windows-run PC via USB, you can access the factory 3-band parametric equalizer (EQ) and customize the tone of your system to perfection. The app also lets you adjust the system's minimum volume level and update the product firmware when needed.

Important Note: This AmpPRO interface simplifies the installation of a car amplifier (not included). You'll also need to purchase anything required to install your new amp: an amp wiring kitspeaker wire (to replace factory wiring), and RCA cables

READ LESS

Product highlights:

  • amplifier integration module and T-harness
    • add an aftermarket amplifier without removing factory amp
  • works with select 2010-up Chrysler and Dodge vehicles
  • 6-channel RCA outputs (front, rear, subs)
  • switchable 5- or 4-volt output
  • retains factory radio controls and audio features
  • wired remote level control for sub channels
  • remote turn-on lead for amplifiers
  • AmpPRO PC App, available from PAC, lets you adjust minimum volume and 3-band EQ via your Windows-run PC
  • optional TOSLINK adapter provides digital output
  • warranty: 1 year
  • MFR # AP4-CH31

What's in the box:

  • Amplifier integration interface module
  • T-harness
  • 6' Rotary-knob cable
  • Rotary-knob
  • Installation Instructions

Customer reviews for PAC AmpPRO AP4-CH31 Aftermarket Amplifier Interface

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More details on the PAC AmpPRO AP4-CH31 Aftermarket Amplifier Interface

Stacey B.

Product Research

Features

Amplifier Integration Interface: The PAC AmpPRO AP4-CH31 simplifies the installation of aftermarket amplifiers in select Chrysler and Dodge vehicles with data-bus controlled factory sound systems. With the AmpPRO AP4-CH31, you can improve your vehicle's audio performance while keeping an original radio's fit, finish, and features.

Notes:

  • The factory radio and factory amplifier must remain connected in the vehicle and be operational in order to use the PAC AmpPRO interface.
  • If you are only using the PAC AmpPRO interface to add a subwoofer amplifier, the factory amplifier will still power the other speakers in the vehicle.

Vehicle Compatibility: The PAC AmpPRO AP4-CH31 amplifier integration interface is compatible with the following 2011-2016 Chrysler, Dodge, and Maserati vehicles with a data-bus controlled factory premium sound system.

Make Model Year
Chrysler 300 2011-2014
Dodge Charger 2011-2014
Journey 2011-2015
Maserati Ghibli 2015
Quattroporte 2014-2016
Note: 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 Harman 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.

6Ch Pre-Outs: The PAC AmpPRO AP4-CH31 provides a 6-channel pre-amp output for use with aftermarket amplifiers. Using the full-range, fixed level factory radio output, in conjunction with data-bus CAN messages, the AP4-CH31 delivers a variable 5V RMS pre-amp output with fading, balance, equalization, and level control capabilities.

Non-Fading Level Control Knob: Channels 5-6 (Sub) of the AP4-CH31 are non-fading outputs. The output level of channels 5-6 can be controlled using the supplied level control knob. The level control knob comes with a 6' cable which plugs into the interface module and should be mounted in an accessible location.

Data Controlled Remote Turn-On: A data controlled remote amplifier turn on wire is also provided by the PAC AmpPRO AP4-CH31. The remote turn-on is rated at 2A of current. If more current is needed an external relay must be used.

Retained Factory Audio Features: The PAC AmpPRO AP4-CH31 also retains all audio from other vehicle features such as factory Navigation Prompts, Bluetooth, uConnect, and Parking Sensor Chimes.

Minimum Volume: If the minimum volume of your factory radio is too loud once the AP4-CH31 is installed, 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 (Steering Wheel Controls) in conjunction with the supplied level control knob. You can also use AmpPRO PC app. 

AmpPRO PC App: Using the AmpPRO PC App (for Windows PC only) allows you to configure user interface options such as Minimum Volume Level and a 3-Band EQ from your Windows computer or laptop. The app can also be used to update product firmware.

  • Minimum Volume Level: From the app you can set the minimum volume level of the factory radio.
  • 3-Band EQ: Enables the 3-band EQ (Bass-Mid-Treble) with frequency and Q-factory adjustment. The Bass Frequency can be set to 60, 80, 100, or 120Hz; while the Bass Q-Factor can be set to 0.5, 1.0, 1.5, or 2.0. The Mid Frequency can be set to 500, 1k, 1.5k, or 2.5k; while the Mid Q-Factor can be set to 0.75, 1.0, 1.25, or 1.5. The Treble Frequency can be set to 7.5k, 10k, 12.5k, or 15k; while the Treble Q-Factory can be set to 0.75 or 1.25.
  • Firmware: The AmpPRO app will also allow you to update the interface with new firmware as it becomes available.
Note: These AmpPRO PC App settings can be adjusted with the module installed in the vehicle or on the bench. However, it is recommended to make the adjustments with the module installed, and the factory radio on so that the changes can be heard.

Dip Switches: Set dip switch 2 to "ON" to lower the RCA output voltage to 4V. Set the dip switch 2 "OFF" to keep the RCA output voltage at 5V. Set dip switch 1 to "ON" 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 adapter (sold separately), or running all cabin speakers off of the front outputs of the AP4-CH31. Dip switches 3-4 are not used.

Optional Toslink Add-On Module: When used in conjunction with PAC's APA-TOS1 (541APATOS1; sold separately), the AP4-CH31 can provide a variable 2-channel fiber optic digital audio output (toslink). Toslink fiber-optical cable also sold separately.

Optional Amplifier Harness: The APH-CH01 installation harness (541APHCH01, sold separately) simplifies speaker wire connections when using one the PAC AmpPRO AP4-CH31 to add an aftermarket amplifier or amplifiers in select vehicles that feature factory amplified sound systems. The APH-CH01 keeps you from having to cut or modify your vehicle's original factory wiring, providing a direct connection at the vehicle's original factory amplifier location (you will need to make hardwire connections at the aftermarket amplifier/s).

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Customer Q&A

6 questions already asked

Q
Just reasking about APH-CH01(optional but recommended) harness as I'm getting multiple answers from different stereo techs on this piece. What exactly does APH-CH01 harness do? Is it for aftermarket amp/s to power the stock speakers? That really doesn't make sense but I can't come up with another function as the PAC unit itself provides the harnesses necessary to power the factory amp to power the 6 outputs so I can hook up aftermarket amps for aftermarket speakers/subs.
chris  Mar 13, 2024
1 answer
A
We can't provide any confirmed details without knowing the exact year, make, model, and specific trim of your exact vehicle, Christopher. When using the PAC AmpPRO AP4-CH31 interface in compatible vehicles, adding the APH-CHO1 allows you to install an aftermarket amp while retaining the use of the factory speaker wires (you won't have to rewire your whole car with speaker wire). We show the factory size wiring can be used with amplifiers up to 100-watts RMS. Changing your speakers to aftermarket upgrades that can handle the RMS power of your amp is also needed. The PAC Harness does not provide any power to your amplifier (a fused power wiring kit is required), only a low-level RCA input signal for use with your aftermarket amplifier. I hope this helps to clarify things!
bo  Mar 14, 2024 (Staff)
Q
Just reasking about APH-CH01(optional but recommended) harness as I'm getting multiple answers from different stereo techs on this piece. What exactly does APH-CH01 harness do? Is it for aftermarket amp/s to power the stock speakers? That really doesn't make sense but I can't come up with another function as the PAC unit itself provides the harnesses necessary to power the factory amp to power the 6 outputs so I can hook up aftermarket amps for aftermarket speakers/subs. Nobody can tell me what this specific harness is for.
chris  Mar 13, 2024
1 answer
A
Hey Chris, great question. So the APH-CH01 itself is what is known as a T-harness is part of the connections needed to add aftermarket amps into a factory system. Essentially that specific piece is designed to plug between the output side of an aftermarket amp and then plugs into the speaker input harness that would normally run to all factory speakers. This essentially allows you to, once you complete your amp add on circuit, to just plug back into your factory system wiring so you don't have to splice back into your system and you can add more power to your speakers. This can amp up your old factory speakers OR just allow you to drop some new replacement speakers in those factory locations and not have to worry about rewiring up your vehicle.
red  Mar 14, 2024 (Staff)
Q
1.DOES ADDING THIS UNIT TO A 2011 CHRYSLER 3OOC WITH FACTORY ALPINE 10 SPEAKER SYSTEM TAKE AWAY ANY FACTORY CONTROLS WHATSOEVER, RADIO OR ANYTHING ELSE? 2.DO I NEED ANY OTHER ITEM/S FOR THIS UNIT TO BE FULLY FUNCTIONAL? IN THE SECOND PICTURE LEFT SIDE I SEE AN OPTIONAL/SOLD SEPARATELY/RECOMMENDED HARNESS(APH-CH01) IT SAYS I NEED THIS IN ORDER TO HOOK UP TO THE FACTORY AMP TO POWER THE 6 PREAMPS, IS THERE ONE INCLUDED OR DON'T I NEED ONE? DOESN'T THE AMPPRO ITSELF PERFORM THIS FUNCTION THIS WAY? SAYS ITEM DOES NOT FIT. 3. IS THE FACTORY AMP STILL POWERING ALL THE FACTORY SPEAKERS IF I'M USING OUTS #5 AND 6 TO MY AFTERMARKET AMP AND AFTERMARKET SUBBOX? WHAT IF IM USING ALL 6 OUTS FOR 1 MONO AFTERMARKET AMP TO SUBBOX AND A 4 CH AFTERMARKET AMP TO 2 PAIRS OF AFTERMARKET SPEAKERS, IS THE FACTORY AMP STILL POWERING THE FACTORY SPEAKERS? OR IS THIS UNIT MORE MEANT FOR REPLACING THE FACTORY SPEAKERS ALTOGETHER OR BOTH? 4.IF I WANT FULL CONTROL OF MY AUDIO USING THIS PRODUCT COULD I AND WOULD I WANT TO ADD ANY PROCESSOR/EQ TYPE UNIT TO THE AMPPRO OUTS BEFORE THE AMPS? WOULD I WANT TO USE THE SEPARATELY AVAILABLE TOSLINK TO THAT PROCESSOR/EQ TO KEEP A DIGITAL SIGNAL? IS THE DIGITAL SIGNAL LOST AT AFTERMARKET AMP TO THE SUBS/SPEAKERS? JUST WONDERING THE ADVANTAGE OF TOSLINK AND IF OPTICAL IS NEEDED. **MAIN MUSIC SOURCE IS ANDROID CELL BUT HAVE A TON OF .FLAC/.WAV/.APE FILES I PLAY THROUGH FACTORY CD AND USB. THANK YOU
swen  Mar 03, 2024
1 answer
A
Greetings Swen. First thank you for including all your vehicle data. You would not lose any factory features. This model is all inclusive for your vehicle, you would need no other wiring. The factory amp must remain connected to power in the vehicle but will no longer power your speakers. You will need to replace your speakers with aftermarket speakers, or risk damage to the factory speakers. If you wish to add some type of signal processor, you can. It would need to have either RCA in and out, or optical in (then you would need the optical adapter) and RCA out. Your factory radio is analog out not digital. That optical cable would only be needed if you had a digital amp, or a processor that used digital in. If you have any more questions on this, contact one of our advisors at 800-324-9695
hogan  Mar 03, 2024 (Staff)
Q
hello, does it fit 2020 dodge charger with alpine oem system?
patryk  Apr 20, 2023
1 answer
A
The AP4-CH31 would not be compatible, but the AP4-CH41 would be. Here's a link to the AP4-CH41: www.crutchfield.com/p_541AP4CH41/item.html
zachary  Apr 20, 2023 (Staff)
Q
Does this unit retain all steering wheel function specifically the Voice Recognition command button and the blutoooth audio that plays thru the speakers? I have seen there is another module for other dodge cars that have a kit just for the Bluetooth function. With adding the amp bypass kit I won't have to get any other plug in to retain a seamless transition. Add the amp pro and I'm good correct? Thank you Mike
mike  Jun 04, 2019
1 answer
A
The ability to retain steering wheel controls with aftermarket receivers will be determined by the receiver you are using and the vehicle you have. For full information on this type of integration (including the parts you will need) please contact an Advisor by phone (1-800-324-9695) or online chat.
kristina  Jun 19, 2019 (Staff)
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