The Best Interfaces & Converters 2025

1. AXXESS - 2-Ch. Line Output Converter for Harley Davidson 2014-2017 Vehicles - Multi

Compatible with 2014-2015 Honda Civic models; retains the HDMI port; 7" length

Don't sacrifice sound for a ride on your hog with this Metra mini 2-channel line output converter. The convenient wiring setup is made for us with Harley-Davidsons from 2014 to 2017, offering cool 80W audio enjoyment. This Metra mini 2-channel line output converter comes with everything needed for a seamless setup.

2. Metra - Axxess Camera Retention Interface for Select 2015-Up Honda Vehicles - Multi

Honda w.o Touchscreen 2015-Up Harness AX-HON24RVC W/ 6 VOLT CONVERT OEM Rear Camera Retention Converts power to 6 volt for oem camera Utilize OEM camera with aftermarket radio - Item Weight: 0.05 - Item Depth: 0.9 - Item Height: 3.9 - Item Width: 7.7 - Number of Pieces: 1 - Outdoor (Y/N): No - Set Y/N: No

Compatible with select 2015-up Honda (without touch screen) models, this AXXESS camera retention harness allows adding the factory camera to an aftermarket radio.

3. AXXESS - 12-Volt to 6-Volt Step-Down Interface - Multi

12 Volt to 6 Volt Step Down Converter This step down adapter converts your vehicles 12 volts down to 6 volts allowing you to retain your factory 6 volt compatible backup camera when installing a new car stereo. Converts 12-Volts DC to 6-Volts DC Provides Proper Voltage for a 6-Volt Factory Backup Camera 1 amp maximum current output Perfect for back up camera system and other low current draw devices - Number of Pieces: 1 - Item Depth: 0.5 - Item Height: 3.1 - Item Weight: 0.03 - Item Width: 5.9 - Set Y/N: No - Outdoor (Y/N): No

Convert 12-volt DC to 6-volt DC easily with this AXXESS AXCSD-6V step-down converter to provide proper voltage for a 6-volt backup camera.

4. AXXESS - Chime Retention Interface for Select Vehicles - Black

Have your portable GPS radar detector installed the easy way: neatly, reliably and professionally by a Geek Squad Autotech.

This Metra LC-GMRC-CL interface retains your vehicle's warning chimes after the amplified or non-amplified sound system has been removed or replaced. The compact design allows easy integration into your vehicle.

5. Maestro - Universal Analog Steering Wheel Interface - Black

Handles up to 150W RMS; built-in Class D amplifier; hook-and-loop straps; aluminum woofer cone; Santoprene surround

Control an aftermarket radio from your steering wheel with the help of this Maestro ADS-MSW universal analog steering wheel interface that allows you to program 2 unique radio functions for each button. Plastic and copper materials ensure durability.

6. AXXESS - Audio Interface Adapter for Select 2012 and Later Hyundai and Kia Vehicles - Black

Over 7,500 loops; new instruments and effects; live performance; remastered interface; MIDI scoring and editing; video editing; mixing and mastering; enhanced automation

Retain the use of an amplifier in your 2012 or newer Hyundai/Kia vehicle with this Axxess interface. It works with AX-HYKIA1-SWC or AX-HYKIA2-SWC for improved audio output.

7. Metra - Axxess Steering Wheel Control and Data Interface for Select 2001-2018 Mercedes Vehicles - Multi

One Solution Provides Total Control Axxess has engineered a new data interface that combines all of the features of the patented ASWC-1 with additional patent-pending features into one robust solution for new radio installations. When replacing a radio, the AXTC-1 utilizes patented Auto-Detect technology (1) that automatically detects the vehicle type, radio connection and preset controls, while allowing the ability to dual assign steering wheel controls. It provides NAV outputs, accessory power and a 12-volt illumination output, in addition to retaining R.A.P., balance and fade. Compatible with More Radios and Vehicles. The Axxess Total Control Series is a universal solution designed to work with all major radio brands and both amplified and non-amplified audio systems. In addition to Auto-Detect, it can be manually programmed for most vehicles and will retain settings even after battery disconnection or interface removal. Additional vehicle-specific packages include harnessing for an easier installation.

Tune your car connection with this AXXESS steering wheel control and data interface. The auto-detect function works with all major radio brands, while the nonvolatile memory retains settings even if battery is disconnected or interface is removed from the vehicle. This AXXESS steering wheel control and data interface fits select 2001-2018 Mercedes vehicles for seamless operation.

8. Metra - Axxess Camera Retention Interface for Select 2011-2016 Chrysler Vehicles - Multi

Compatible with Chrysler®. This product is not created or sold by Chrysler®.; Retains the factory back-up camera to an aftermarket radio.;

Compatible with select 2011-2016 Chrysler models, this AXXESS camera retention harness allows adding the factory camera to an aftermarket radio.

9. Metra - Axxess Data Interface for Select 2006-2012 GM Vehicles - Multi

GM Data Interface 2006-2012 GM Data Interface 2006-2012 Provides accessory power (12-volt 10-amp) Micro-B USB updatable Retains fade and balance Retains chimes through an onboard speaker - Set Y/N: No - Outdoor (Y/N): No - Item Weight: 0.38 - Number of Pieces: 1 - Item Depth: 2.6 - Item Height: 3 - Item Width: 8.2

Tune your car connection with this AXXESS data interface. The multimedia radio outputs offer multiple vehicle motion functions, such as reverse and speed sense, while the built-in audio controls enable hassle-free access. This AXXESS data interface fits select 2006-2012 GM vehicles for seamless operation.

10. Metra - Axxess Steering Wheel Control and Data Interface for Select 2006-2012 GM Vehicles - Multi

Axxess Combines an Interface and DSP for Digital, Analog or Non-Amplified Vehicles! From fixed level output for digital systems to analog factory systems, or even adding a subwoofer to an OE system, the versatile AX-DSP has installers covered.

Tune your car connection with this AXXESS steering wheel control and data interface. The multimedia radio outputs offer multiple vehicle motion functions, such as reverse and speed sense, while the built-in audio controls enable hassle-free access. This AXXESS data interface with SWC fits select 2006-2012 GM vehicles for seamless operation.