RZR14-K4

The Rockford Fosgate RZR14-K4 (also listed as RFRZ14-K4) is a complete 4-gauge amplifier wiring kit and mounting solution designed specifically for select Polaris RZR models. It’s built to simplify adding aftermarket amplifiers into RZR audio systems while maintaining clean, weather-resistant installation practices.

The RZR14-K4 is especially popular in:

• Polaris RZR Stage 3 builds
• Stage 4 audio systems
• Amplifier upgrades
• Custom UTV audio builds
• Subwoofer system additions
• High-output off-road audio systems

One of the biggest reasons installers use this kit is because it provides:

• Proper amplifier mounting
• Correct power wiring
• RZR-specific fitment
• Weather-resistant integration
• Cleaner installation routing

instead of forcing universal amp kits into tight UTV spaces.

Key Features

• 4 AWG amplifier wiring kit
• Vehicle-specific amplifier mounting plate
• Designed for select Polaris RZR models
• Plug-and-play style integration
• Heavy-duty power and ground wiring
• Weather-resistant construction
• Designed for off-road environments
• Simplified amplifier installation
• Compatible with Rockford Stage systems
• Supports additional amplifier expansion

Common Applications
The RZR14-K4 is commonly paired with:

• RZR14-STG3
• RZR14-STG4
• RZR14-STG5
• PMX-series source units
• M5-series amplifiers
• Color Optix systems

It’s especially common when adding:

• subwoofers,
• rear speaker pods,
• or higher-power amplifier systems.

Why It’s Better Than Universal Amp Kits
Compared to generic amp kits:

• Cleaner mounting
• Easier installation
• Better wire routing
• Better durability
• Less vibration issues
• Better water resistance
• More OEM-style appearance

The RZR-specific mounting system is important because space inside RZRs is extremely limited and exposed to: