Chevy | GMC 2019-Up — AXSUB-GM4

Product Overview

Add an aftermarket subwoofer to a compatible Chevy or GMC while retaining the factory radio with the Axxess AXSUB-GM4 Add-A-Sub interface. Designed for select 2019-up applications, it restores and extends low-frequency response that factory radios may limit.

Key Features & Benefits

• Non-amplified system design: Made for adding a subwoofer to a non-amplified system.
• Two-channel, non-fading output: Provides a 5V RMS signal for the subwoofer connection.
• Fixed 234Hz low-pass frequency: Sends a low-frequency signal to support subwoofer use.
• Included bass control: The dash-mountable knob lets you adjust bass from the driver’s seat.
• Remote turn-on output: Supplies a 250mA output for remote turn-on.
• USB updatable: The Micro “B” USB connection supports updates.

Technical Specifications

• Model: AXSUB-GM4
• Application in product title: Chevy | GMC 2019-Up
• System design: Non-amplified systems
• Output: 2-channel, non-fading, 5V RMS
• Fixed low-pass frequency: 234Hz
• Remote turn-on output: 250mA
• Update connection: Micro “B” USB
• Installation location: Radio location
• Warranty: 1 year
• Included: Interface, vehicle T-harness, bass knob

Why Choose This Product?

The AXSUB-GM4 is designed to address limited factory-radio bass response when adding an aftermarket subwoofer. Its vehicle-specific harness and radio-location installation are part of the kit’s plug-and-play approach. The included dash-mountable knob gives you a convenient way to adjust bass while driving.

Installation & Compatibility Notes

This interface is designed for non-amplified systems and installs at the radio location. The product title identifies Chevy and GMC 2019-up applications; confirm the specific vehicle application and system type before choosing the kit.

Frequently Asked Questions

What does the AXSUB-GM4 do?

It provides an interface for adding an aftermarket subwoofer and restores and extends low-frequency response that may be limited by a factory radio.

What kind of system is it designed for?

It is designed for non-amplified systems.

What output does the interface provide?

It provides a 2-channel, non-fading 5V RMS output, with a fixed 234Hz low-pass frequency.

Can I adjust the bass from the dash?

Yes. A dash-mountable bass control knob is included.

What comes in the kit?

The kit includes the interface, vehicle T-harness, and bass knob.

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