AXDSPX-BMWM25
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com © COPYRIGHT 2024 METRA ELECTRONICS CORPORATION REV. 5/10/24 INSTAXDSPX-BMWM25
BMW MOST25
®
DSPX Interface
with Amplifier Bypass Harness 2010-2020
INTERFACE COMPONENTS
• AXDSPX-BMWM25 interface • AXDSPX-BMWM25 harness
• AXBK-1 Bass Knob • LD-MOSTCAP •BMWM25
Visit axxessinterfaces.com for a current application list
TOOLS & INSTALLATION ACCESSORIES REQUIRED
• Crimping tool and connectors, or solder gun, solder, and heat shrink
• Tape • Wire cutter • Zip-ties
• Multimeter • Tone generator
TABLE OF CONTENTS
Interface Features ..................................................2
Connections: Adding a Full-Range Amp
& Sub to a Factory System ................................. 3
Installing the Fiber Optic Cable.............................4
Installation .........................................................5-6
Quick Setup Steps: AX-DSP-XL App .......................7
Specifications ......................................................... 8
Troubleshooting..................................................... 9
LED Feedback ......................................................... 9
Speaker Assignment QR Code .............................10
iOS 12.1 or higher
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.
Visit AxxessInterfaces.com for more detailed
information about the product and
up-to-date vehicle specific applications
Google Play Store
Apple App Store
For Dash Disassembly Instructions, refer to metraonline.com. Enter the year, make, and model of the vehicle in the Vehicle Fit Guide for Radio Install kits.
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.
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