Table of Contents
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Quick Links
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.
For Dash Disassembly Instructions, refer to
AxxessInterfaces.com
BMW MOST25
with Amplifier Bypass Harness
INTERFACE COMPONENTS
• AXDSPX-BMWM25 interface • AXDSPX-BMWM25 harness
• AXBK-1 Bass Knob
TOOLS & INSTALLATION ACCESSORIES REQUIRED
• Crimping tool and connectors, or solder gun, solder, and heat shrink
• Tape
• Multimeter
www.MetraOnline.com
metraonline.com.
Enter the year, make, and model of the vehicle in the Vehicle Fit Guide for Radio Install kits.
© COPYRIGHT 2024 METRA ELECTRONICS CORPORATION
DSPX Interface
®
Visit
axxessinterfaces.com
for a current application list
• LD-MOSTCAP
• Wire cutter
• Tone generator
Google Play Store
AXDSPX-BMWM25
I N S T A L L A T I O N I N S T R U C T I O N S
TABLE OF CONTENTS
Interface Features ..................................................2
2010-2020
& Sub to a Factory System .................................3
Installing the Fiber Optic Cable.............................4
Installation .........................................................5-6
Quick Setup Steps: AX-DSP-XL App .......................7
•BMWM25
Specifications ......................................................... 8
Troubleshooting..................................................... 9
LED Feedback ......................................................... 9
Speaker Assignment QR Code .............................10
• Zip-ties
Visit
AxxessInterfaces.com
information about the product and
Apple App Store
up-to-date vehicle specific applications
iOS 12.1 or higher
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.
for more detailed
REV. 5/10/24 INSTAXDSPX-BMWM25
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Table of Contents
Related Manuals for Axxess AXDSPX-BMWM25
Summary of Contents for Axxess AXDSPX-BMWM25
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Page 1: Table Of Contents
Visit axxessinterfaces.com for a current application list Installing the Fiber Optic Cable......4 INTERFACE COMPONENTS Installation ............5-6 • AXDSPX-BMWM25 interface • AXDSPX-BMWM25 harness Quick Setup Steps: AX-DSP-XL App .......7 • AXBK-1 Bass Knob • LD-MOSTCAP •BMWM25 Specifications ............8 Troubleshooting............. 9 LED Feedback ............ -
Page 2: Interface Features
INTERFACE FEATURES INTERFACE FEATURES • Includes a DSP (Digital Signal Processor) • Bass knob included for level control of subwoofer amp • Designed for MOST amplified sound systems ® • Settings adjusted via Bluetooth ® in a smart device application (tablet or mobile phone), compatible with both Android and Apple devices •... -
Page 3: Connections: Adding A Full-Range Amp & Sub To A Factory System
CONNECTIONS: ADDING A FULL-RANGE AMP & SUB TO A FACTORY SYSTEM RCA Jacks Factory Amp CONNECTION TYPE Factory Amp Harness (sold separately) (must be removed) Speaker Assignment QR Code located on page 10 of instructions PWR CONNECTION TYPE An SPDT relay, Metra part number E-123, must be used if the amp turn-on Type: current of all amps exceed 1-amp. -
Page 4: Installing The Fiber Optic Cable
INSTALLING THE FIBER OPTIC CABLE Installing the Fiber Optic Cable: • From the MOST Interface: Using the same steps from above, remove the gray insert Removal of the original fiber optic from the black fiber optic housing. Replace connection is required to adapt to the the gray connector with the fiber optic cables Media Oriented System Transport into the MOST interface’s black connector... -
Page 5: Installation
AXDSPX-BMWM25 interface. For fiber optic connection, please refer to page 8, Installing the Fiber Optic Cable. 4. Plug the 12-pin and 16-pin connectors from the AXDSPX-BMWM25 harness into the AXDSPX-BMWM25 interface. 5. Download and install the AX-DSP-XL app from the Google Play Store or Apple App Store or use the QR code on the cover. - Page 6 INSTALLATION (CONT.) 8. Scroll to the Configuration tab then select the vehicle type. Press the Lock Down button to save the configuration. (Figure B) 9. Connect the Blue/White amp turn-on wire. 10. Click the Identify button to confirm the interface is connected properly. A chime will be heard from the front left speaker.
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Page 7: Quick Setup Steps: Ax-Dsp-Xl App
7. From the Configuration page click the Identify button to confirm that the AXDSPX-BMWM25 is connected properly. If so, a chime will be heard from the 2. Turn Vehicle Ignition on. Make sure the Remote Turn on lead is disconnected. -
Page 8: Specifications
SPECIFICATIONS Specifications General Input Impedance 1M Ohm Operating Voltage 10 - 16VDC Input Channels 6 High/Low level Selectable Standby Current Draw ~7mA Input Options High Level or Low Level Operation Current Draw ~150mA Input Type Differential-Balanced Adjustments/Controls Application via Bluetooth ®... -
Page 9: Troubleshooting
TROUBLESHOOTING LED FEEDBACK If the Red light in the interface is blinking, it is not communicating with the vehicle. BLINK RATE CONDITION/STATUS 1. Cycle the key off. LED Heartbeat BOARD POWERED ON 2. Unplug the connectors from the vehicle to the interface. LED Fade In/Out Slow CONNECTED TO MOST 3. -
Page 10: Speaker Assignment Qr Code
AXDSPX-BMWM25 I N S T A L L A T I O N I N S T R U C T I O N S Having difficulties? We’re here to help. Contact our Tech Support line at: 386-257-1187 Or via email at: techsupport@metra-autosound.com...
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