Axxess AXSUB-GM6 Add-A-Sub Data Interface for Select GM Vehicles
Add powerful bass performance to your factory audio system with the Axxess AXSUB-GM6 Add-A-Sub Data Interface. Designed for select 2021 and newer GM vehicles with non-amplified factory systems, this vehicle-specific interface provides a simple solution for adding an aftermarket subwoofer and amplifier while maintaining factory radio functionality. The AXSUB-GM6 restores and extends low-frequency output that is often limited by factory radios, allowing your subwoofer system to deliver stronger and more accurate bass performance.
The AXSUB-GM6 provides a 2-channel non-fading 5V RMS output for connecting an aftermarket subwoofer amplifier directly to the factory radio system. Featuring a fixed 234Hz low-pass frequency, the interface delivers a dedicated bass signal optimized for subwoofer applications while maintaining a clean integration with the vehicle’s existing audio system.
Designed for easy installation, the AXSUB-GM6 installs directly at the radio location and includes a vehicle-specific T-harness for a cleaner, plug-and-play connection. The included bass control knob allows convenient adjustment of subwoofer output levels, giving users quick control over bass performance from the driver’s seat.
The AXSUB-GM6 also provides a 250mA remote turn-on output to activate an aftermarket subwoofer amplifier and includes Micro-B USB update capability for future software updates. The interface is designed for select GM vehicles equipped with compatible factory radio systems, making it an ideal solution for adding aftermarket bass without replacing the factory receiver.
Before purchasing, vehicle compatibility should always be verified. The AXSUB-GM6 is designed for select GM applications from 2021 and newer, including compatible Buick, Chevrolet, and GMC models with non-amplified factory audio systems. Some vehicles equipped with active noise cancellation (ANC) may require an additional bypass solution.
Whether adding a powered subwoofer, upgrading factory bass performance, or building a complete aftermarket audio system, the Axxess AXSUB-GM6 provides a clean, reliable, and professional solution for integrating aftermarket subwoofer equipment with select GM factory radios.
Key Features
- Vehicle-specific GM Add-A-Sub interface
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Designed for select 2021 and newer GM vehicles
- Designed for non-amplified factory audio systems
- Adds aftermarket subwoofer capability to factory radios
- 2-channel non-fading 5V RMS output
- Fixed 234Hz low-pass frequency
- 250mA remote turn-on output
- Includes bass control knob for subwoofer level adjustment
- Vehicle-specific T-harness included
- Installation completed at the radio location
- Micro-B USB update capability
- Maintains factory radio functionality
- Provides clean integration with aftermarket subwoofer amplifiers
- Ideal for factory audio system bass upgrades
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Includes:
- AXSUB-GM6 interface
- Vehicle-specific T-harness
- Bass control knob
