Axxess AXDSPL-CH3, Installation Instructions Manual

2

Adding a sub to a factory system:

This feature offers the ability to add a subwoofer to a factory system, whether amplified 
or non-amplified. (refer to page 3)

Adding a full-range amp & sub to a factory system:

This feature offers the ability to add a full-range amp and sub to a factory system, whether 
amplified 

† 

or non-amplified. (refer to page 4)

†

  For amplified models the amp must be bypassed/unplugged, and 

With OE Amplifier

 chosen in 

the 

Configuration

 tab under 

Vehicle Type

. Use Axxess AXABH-CH2 (sold separately) to bypass the 

amp for best results. 

16-pin header port:

Inside the interface is a 16-pin header port for adding optional modules (sold separately). Page 5 
and 6 will show the installation and use of these modules.
• 

AXDSPL-BT

 - Bluetooth streaming interface

• 

AXDSPL-SP

 - Toslink digital output

Note: 

The interface provides a 12-volt 1-amp output to turn on aftermarket amp(s). If installing 

multiple amps, an SPDT automotive relay will be required if the amp turn-on current of all amps 
combined exceeds 1-amp. Use Metra part number E-123 (sold separately) for best results.

1.

  Remove the factory radio †, then unplug all connectors.

2.

  Install the 

AXDSPL-CH3 vehicle T-harness

 to the vehicle and make all necessary 

connections, but leave the amp turn-on wire disconnected.

3.

  Plug the 

AXDSPL-CH3 vehicle T-harness

 to the 

AXDSPL-CH3 interface

.

4.

  Plug the 

AXDSPL-CH3 interface harness

 to the 

AXDSPL-CH3 interface

.

5.

  Download and install the 

AX-DSP-X app

 from the 

Google Play Store

 or 

Apple App Store

.

6.

  Cycle the ignition on.

7.

  Open the app then select the 

Bluetooth Connection

 tab. Follow the instructions to 

pair the mobile device to the interface. Refer to page 6 for more information.

8.

  Scroll to the 

Configuration

 tab then select the vehicle type. Press the

 Lock Down

 ‡ 

button to save the configuration. Refer to page 7 for more information.

9.

  Connect the amp turn-on wire.

10.

 Adjust the settings in the app as desired. Press the 

Lock Down 

‡ button to save any 

new configurations.

†  Refer to Metra online for dash disassembly. If Metra makes a dash kit for the vehicle, 

disassembly will be within those instructions.

‡  Anytime the interface is locked down the key must be cycled off then back on

INSTALLATION OPTIONS

INSTALLATION