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  1. Home
  2. Products
  3. Car & Truck Enclosures
  4. Products
  5. Off-Road Amplifier Kits

The following Off-Road Amplifier Kits are available:

PBR300.2

PBR300.2 300W Off-Road Audio Amplifier Kit with Bluetooth Controller

US PATENT # 11,405,721 B2

Take Amplified Audio on Your Off-Road Adventure

The PBR300.2 is a revolutionary new product that provides a complete solution for streaming amplified Bluetooth audio from your mobile device to your off-road ProBox tower speakers. The kit includes a 300 watt amp, Bluetooth® and USB/AUX modules that pop into any standard rocker switch slot, fuse holder, and all the wiring you will need.

The amp is (2) channel 100 x 100 watts rms at 4 ohms (two tower speakers) and 150 x 150 watt rms at 2 ohms (four tower speakers). Unlike standard marine grade amps, the PBR300 features watertight molded rubber inserts around the wiring and a removable plexiglass panel with a rubber gasket to protect the gain and crossover controls.

This kit works great with ATVs, side by sides, golf carts, boats, personal watercraft, tractors and more.

With the free GLO•PRO app, you can use your mobile device to control the RGB LEDs in your ProBox tower speakers. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

A Complete Audio Streaming Solution

Includes everything you need to stream Bluetooth + 300.2W amplified audio to your off-road ProBox tower speakers:

  • 8 feet of power/ground wire
  • Extended leads and micro port for few connections
  • Fuse holder and fuse
  • Bluetooth audio controller (volume, track, power on/off)
  • USB charging port and AUX input

MSRP: $525

Rubber molded inserts

Rubber molded inserts around the wiring prevent water from entering the amp.

Plexiglass panel

A removable plexiglass panel with a rubber gasket protect the gain and crossover controls.

Wiring Installation Guide

Click here to download a PDF (79 kB)

Wiring installation diagram

BTR-14 Module Instructions

Click here to download a PDF (95 kB)

BTR-14 module instructions
ATV

ATVs

UTV

UTVs

Golf Carts

Golf Carts

Boats

Boats

Personal Watercraft

Personal Watercraft

Can Your Amp Do This?

Smartphones

Control Your RGB LED Lights from Your Phone

With the GLO•PRO app, you can use your smartphone to simultaneously control the colors and flash pattern of the LEDs in your ProBox RGB tower speakers, RGB component speakers, and RGB wheel well kit. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

GLO•PRO app icon
iTunes App Store Badge Google Play Badge

Assembled in the USA with parts from China. Availability, pricing, descriptions and specifications subject to change without notice.

PBR1000.2

PBR1000.2 1000 W, 2 Channel Off-Road Audio Amplifier Kit with Bluetooth Controller

US PATENT # 11,405,721 B2

Take Amplified Audio on Your Off-Road Adventure

The PBR1000.2 is a revolutionary new product that provides a complete solution for streaming amplified Bluetooth audio from your mobile device to your off-road ProBox tower speakers. The kit includes a 1000.2 watt amp, Bluetooth® and USB/AUX modules that pop into any standard rocker switch slot, fuse holder, and all the wiring you will need.

The PBR1000 features watertight molded rubber inserts around the wiring and a removable plexiglass panel with a rubber gasket to protect the gain and crossover controls.

This kit works great with ATVs, side by sides, golf carts, boats, personal watercraft, tractors and more.

With the free GLO•PRO app, you can use your mobile device to control the RGB LEDs in your ProBox tower speakers. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

A Complete Audio Streaming Solution

Includes everything you need to stream Bluetooth + 1000.2W amplified audio to your off-road ProBox tower speakers:

  • 8 feet of power/ground wire
  • Extended leads and micro port for few connections
  • Fuse holder and fuse
  • Bluetooth audio controller (volume, track, power on/off)
  • USB charging port and AUX input

MSRP: $800

Rubber molded inserts

Rubber molded inserts around the wiring prevent water from entering the amp.

  • Plexiglass panel
  • Plexiglass panel

A removable plexiglass panel with a rubber gasket protect the gain and crossover controls.

Rocker switch slot

The included Bluetooth® and USB/AUX modules pop into any standard rocker switch slot.

The Bluetooth® and USB/AUX modules

The Bluetooth® and USB/AUX modules

Wiring Installation Guide

Click here to download a PDF (105 kB)

Wiring installation diagram

BTR-14 Module Instructions

Click here to download a PDF (95 kB)

BTR-14 module instructions
ATV

ATVs

UTV

UTVs

Golf Carts

Golf Carts

Boats

Boats

Personal Watercraft

Personal Watercraft

Can Your Amp Do This?

Smartphones

Control Your RGB LED Lights from Your Phone

With the GLO•PRO app, you can use your smartphone to simultaneously control the colors and flash pattern of the LEDs in your ProBox RGB tower speakers, RGB component speakers, and RGB wheel well kit. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

GLO•PRO app icon
iTunes App Store Badge Google Play Badge

Assembled in the USA with parts from China. Availability, pricing, descriptions and specifications subject to change without notice.

PBR2000.2

PBR2000.2 2000W Off-Road Audio Amplifier Kit with Bluetooth Controller

US PATENT # 11,405,721 B2

Take Amplified Audio on Your Off-Road Adventure

The PBR2000.2 is a revolutionary new product that provides a complete solution for streaming amplified Bluetooth audio from your mobile device to your off-road ProBox tower speakers. The kit includes a 2000 watt amp, Bluetooth® and USB/AUX modules that pop into any standard rocker switch slot, fuse holder, and all the wiring you will need.

The amp is 1000 x 1000 W at 2 ohms and 650 x 650 W at 4 ohms. Unlike standard marine grade amps, the PBR2000.2 features watertight molded rubber inserts around the wiring and a removable plexiglass panel with a rubber gasket to protect the gain and crossover controls.

This kit works great with ATVs, side by sides, golf carts, boats, personal watercraft, tractors and more.

With the GLO•PRO app, you can use your smartphone to simultaneously control the colors and flash pattern of the LEDs in your ProBox RGB tower speakers, RGB component speakers, and RGB wheel well kit. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

A Complete Audio Streaming Solution

Includes everything you need to stream Bluetooth + 2000W amplified audio to your off-road ProBox tower speakers:

  • 8 feet of power/ground wire
  • Extended leads and micro port for few connections
  • Fuse holder and fuse
  • Bluetooth audio controller (volume, track, power on/off)
  • USB charging port and AUX input

MSRP: $900

Rubber molded inserts

Rubber molded inserts around the wiring prevent water from entering the amp.

Plexiglass panel

A removable plexiglass panel with a rubber gasket protect the gain and crossover controls.

Rocker switch slot

The included Bluetooth® and USB/AUX modules pop into any standard rocker switch slot.

The Bluetooth® and USB/AUX modules

The Bluetooth® and USB/AUX modules

Wiring Installation Guide

Click here to download a PDF (79 kB)

Wiring installation diagram

Bluetooth® Module Instructions

Click here to download a PDF (100 kB)

Bluetooth module instructions
ATV

ATVs

UTV

UTVs

Golf Carts

Golf Carts

Boats

Boats

Personal Watercraft

Personal Watercraft

Can Your Amp Do This?

Smartphones

Control Your RGB LED Lights from Your Phone

With the GLO•PRO app, you can use your smartphone to simultaneously control the colors and flash pattern of the LEDs in your ProBox RGB tower speakers, RGB component speakers, and RGB wheel well kit. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

GLO•PRO app icon
iTunes App Store Badge Google Play Badge

Assembled in the USA with parts from China. Availability, pricing, descriptions and specifications subject to change without notice.

PBR400.2

PBR400.2 400W Off-Road Audio Amplifier Kit with Bluetooth Controller

US PATENT # 11,405,721 B2

Take Amplified Audio on Your Off-Road Adventure

The PBR400.2 is a revolutionary product that provides a complete solution for streaming amplified Bluetooth audio from your mobile device to your off-road ProBox tower speakers. The kit includes a 400 watt amp, Bluetooth® and USB/AUX modules that pop into any standard rocker switch slot, fuse holder, and all the wiring you will need.

The amp is (2) channel 100 x 100 watts rms at 4 ohms (two tower speakers) and 200 x 200 watt rms at 2 ohms (four tower speakers). Unlike standard marine grade amps, the PBR400 features watertight molded rubber inserts around the wiring and a removable plexiglass panel with a rubber gasket to protect the gain and crossover controls.

This kit works great with ATVs, side by sides, golf carts, boats, personal watercraft, tractors and more.

With the free GLO•PRO app, you can use your mobile device to control the RGB LEDs in your ProBox tower speakers. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

A Complete Audio Streaming Solution

Includes everything you need to stream Bluetooth + 400.2W amplified audio to your off-road ProBox tower speakers:

  • 8 feet of power/ground wire
  • Extended leads and micro port for few connections
  • Fuse holder and fuse
  • Bluetooth audio controller (volume, track, power on/off)
  • USB charging port and AUX input

MSRP: $575

Rubber molded inserts

Rubber molded inserts around the wiring prevent water from entering the amp.

Plexiglass panel

A removable plexiglass panel with a rubber gasket protect the gain and crossover controls.

Wiring Installation Guide

Click here to download a PDF (79 kB)

Wiring installation diagram

BTR-14 Module Instructions

Click here to download a PDF (95 kB)

BTR-14 module instructions
ATV

ATVs

UTV

UTVs

Golf Carts

Golf Carts

Boats

Boats

Personal Watercraft

Personal Watercraft

Can Your Amp Do This?

Smartphones

Control Your RGB LED Lights from Your Phone

With the GLO•PRO app, you can use your smartphone to simultaneously control the colors and flash pattern of the LEDs in your ProBox RGB tower speakers, RGB component speakers, and RGB wheel well kit. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

GLO•PRO app icon
iTunes App Store Badge Google Play Badge

Assembled in the USA with parts from China. Availability, pricing, descriptions and specifications subject to change without notice.

PBR1200.6

PBR1200.6 1200 W, 6 Channel Off-Road Audio Amplifier Kit with Bluetooth Controller

US PATENT # 11,405,721 B2

Take Amplified Audio on Your Off-Road Adventure

The PBR1200.6 is a revolutionary new product that provides a complete solution for streaming amplified Bluetooth audio from your mobile device to your off-road ProBox tower speakers. The kit includes a 1200.6 watt amp, Bluetooth® and USB/AUX modules that pop into any standard rocker switch slot, fuse holder, and all the wiring you will need.

The PBR1200 features watertight molded rubber inserts around the wiring and a removable plexiglass panel with a rubber gasket to protect the gain and crossover controls.

This kit works great with ATVs, side by sides, golf carts, boats, personal watercraft, tractors and more.

With the free GLO•PRO app, you can use your mobile device to control the RGB LEDs in your ProBox tower speakers. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

A Complete Audio Streaming Solution

Includes everything you need to stream Bluetooth + 1200.6W amplified audio to your off-road ProBox tower speakers:

  • 8 feet of power/ground wire
  • Extended leads and micro port for few connections
  • Fuse holder and fuse
  • Bluetooth audio controller (volume, track, power on/off)
  • USB charging port and AUX input

MSRP: $900

Rubber molded inserts

Rubber molded inserts around the wiring prevent water from entering the amp.

  • Plexiglass panel
  • Plexiglass panel

A removable plexiglass panel with a rubber gasket protect the gain and crossover controls.

Rocker switch slot

The included Bluetooth® and USB/AUX modules pop into any standard rocker switch slot.

The Bluetooth® and USB/AUX modules

The Bluetooth® and USB/AUX modules

Wiring Installation Guide

Click here to download a PDF (105 kB)

Wiring installation diagram

BTR-14 Module Instructions

Click here to download a PDF (95 kB)

BTR-14 module instructions
ATV

ATVs

UTV

UTVs

Golf Carts

Golf Carts

Boats

Boats

Personal Watercraft

Personal Watercraft

Can Your Amp Do This?

Smartphones

Control Your RGB LED Lights from Your Phone

With the GLO•PRO app, you can use your smartphone to simultaneously control the colors and flash pattern of the LEDs in your ProBox RGB tower speakers, RGB component speakers, and RGB wheel well kit. The GLO•PRO app is available for free from the iTunes App Store and Google Play.

GLO•PRO app icon
iTunes App Store Badge Google Play Badge

Assembled in the USA with parts from China. Availability, pricing, descriptions and specifications subject to change without notice.

  1. Off-Road Amplifier Kits

© 2025 Kirkland Audio, LLC. All rights reserved. PROBOX, PROBOXROCKS, NOTHING ROCKS LIKE A PROBOX, OFF-ROAD AUDIO and OFF-ROAD AUDIO EXTREME CERTIFIED are registered trademarks of Kirkland Audio, LLC in the United States and other countries. All other trademarks are property of their respective owners. Specifications are subject to change without notification.