
AXDSPX-GL9
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com  © COPYRIGHT 2024 METRA ELECTRONICS CORPORATION  REV. 8/6/24 INSTAXDSPX-GL9
INTERFACE FEATURES
INTERFACE COMPONENTS
TABLE OF CONTENTS
Installation & Installation Options ........................2
Connections ........................................................3-4
Mobile App: Quick Setup ................................... 5-6
Specifications ......................................................... 7
GM DSP Interface with Pre-Wired Harness
 
2014-2020
•  Designed for non-amplified models
•  Includes a DSP (Digital Signal Processor)
•  Selectable 31 Band graphic EQ or 5 Band Parametric EQ
•  10 individually assignable outputs
•  Independent equalization on each of the 10 outputs
•  Independent high pass, low pass, and bandpass filters
•  Each channel can be delayed independently up to 10ms
•  Clipping detection and limiting circuits
•  Retains factory parking sensor chimes
•  Retains OnStar
® 
voice prompts
•  Adjustable chime level
(Features continued on next page)
APPLICATIONS
Visit Axxessinterfaces.com for current application list
www.MetraOnline.com
MetraOnline.com may be used to assist with 
dash assembly instructions. Simply enter 
your Year, Make, Model vehicle into the 
vehicle fit guide and look for the Dash Kit 
Installation Instructions.
TOOLS & INSTALLATION ACCESSORIES REQUIRED
• Crimping tool and connectors, or solder gun, 
  solder, and heat shrink • Tape • Wire cutter
• Zip ties • Multimeter
ATTENTION: With the key out of the ignition, disconnect 
the negative battery terminal before installing this 
product. Ensure that all installation connections, 
especially the air bag indicator lights, are plugged in 
before reconnecting the battery or cycling the ignition 
to test this product.
NOTE: Refer also to the instructions included with the 
aftermarket accessory before installing this device.
Google Play Store
Apple App Store
iOS 12.1 or higher
• AXDSPX-GL9 interface
• AXDSPX-GL9 interface harness
• AXDSPX-GL9 vehicle T-harness 
• Bass knob