ROCKFORD FOSGATE M5-TM400 Harness Amplifier M5/TM400 M5-800X4 For TM400XADINPUT

( Brand: Rockford Fosgate ), ( Type: Amplifier ), ( Manufacturer Part Number: M5/TM400 ), ( Country Of Origin: United States )

Review ROCKFORD FOSGATE M5/tm400 M5-800x4 Tm400xadinput Harness Harley fits ROAD GLIDE M5 TM400 TM400XAD 2015–2023

Introducing the Rockford Fosgate M5/TM400 M5-800x4 TM400XAD Input Harness for Harley-Davidson Road Glide models between years 15 and 23, designed specifically for use with the TM400XAD 4-channel amplifier. This harness simplifies the installation process by providing a direct and secure connection between the Harley-Davidson factory radio and the amplifier.

The M5-800x4 harness is meticulously engineered to ensure a perfect fit and function with the Road Glide's factory wiring. It includes five wires: a constant power wire, a turn-on signal wire, two RCA audio input wires, and a ground wire. The constant power wire connects to the vehicle's power source, while the turn-on signal wire ensures the amplifier only receives power when the radio is on. The two RCA audio input wires transmit the audio signal from the radio to the amplifier for amplification and distribution to the speakers. Lastly, the ground wire connects the amplifier to the vehicle's ground source, minimizing the possibility of electrical interference.

All wires are shielded and insulated to protect against potential damage from the elements and the rigors of riding. The M5-800x4 harness is also designed with easy-to-connect push-on terminals, making the installation process quick and straightforward. Additionally, it is compatible with both stock and aftermarket radios, allowing you to upgrade your audio system with confidence.

By utilizing the Rockford Fosgate M5/TM400 M5-800x4 TM400XAD Input Harness, you can enjoy a high-performance audio system in your Harley-Davidson Road Glide without the hassle of complex wiring or custom fabrication. This harness ensures a secure and reliable connection between your radio and amplifier, allowing you to focus on the joy of the ride.

The Rockford Fosgate M5/TM400 M5-800x4 TM400XAD Input Harness is designed specifically for Harley-Davidson Road Glide models between years 15 and 23. This harness allows for the installation of a TM400XAD amplifier, which can provide improved sound quality and volume for your motorcycle audio system. Let's examine the potential pros and cons of purchasing this harness.

1. Designed for Harley-Davidson Road Glide: This harness is engineered to fit and function optimally in Harley-Davidson Road Glide motorcycles, ensuring a seamless installation process.

2. Easy installation: The harness comes with a plug-and-play design that minimizes the need for extensive wiring modifications.

3. High-quality components: Rockford Fosgate is known for manufacturing high-quality audio equipment, and this harness is no exception.

4. Improved sound quality: By integrating an external amplifier, you can experience enhanced sound quality and volume, providing a more enjoyable listening experience.

5. Compatibility with multiple amplifiers: The TM400XAD harness is compatible with various Rockford Fosgate amplifiers, allowing you to choose the one that best suits your audio preferences and power requirements.

1. Cost: The Rockford Fosgate M5/TM400 M5-800x4 TM400XAD Input Harness and the amplifier it is designed for can be a significant investment for some motorcycle enthusiasts.

2. Requires an additional purchase: To use this harness, you must also purchase a compatible amplifier, which adds to the overall cost.

3. Complexity for first-time installers: While the harness is designed for easy installation, those with limited experience in audio system upgrades may find the process challenging.

In conclusion, the Rockford Fosgate M5/TM400 M5-800x4 TM400XAD Input Harness offers several advantages, such as ease of installation, compatibility with various amplifiers, and improved sound quality. However, the investment required to purchase both the harness and a compatible amplifier may be a disadvantage for some. If you are an avid motorcycle audio enthusiast and desire a more powerful and high-quality sound system, this harness and amplifier combination could be an excellent choice. Alternatively, if you are looking for a more budget-friendly option, you may consider exploring other amplifier and harness combinations or opting for a different audio upgrade. Ultimately, the decision to purchase this harness depends on your personal preferences, budget, and audio system goals.

part # m5tm400 prices

• $369.99-$701.55

specifications scootnav:

• for models: M5, Tm400, Tm400xad, Road, Glide
• for makes: Harley
• for years: 2015-2023
• brand: Rockford Fosgate
• type: Amplifier
• manufacturer part number: M5/TM400
• country of origin: United States

returns scootnav:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

seller scootnav:

• # reviews: 39002
• rating: 99.9%

payments scootnav:

• wallet: Apple-pay
• other
• credit card: Diners-club

offer scootnav:

• best offers: True
• availability: In Stock
• sold: 0
• quantity: 2
• started: March 3, 2026
• options: Ship-to-home

general scootnav:

• Motorcycle Scooter Parts Accessories > Audio, Communication Navigation > Amplifiers
• condition: New

shipping scootnav:

• service: Standard
• cost: $8.00
• transit: 3-7 Days
• type: Fixed
• class: Standard

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