BAK400XL 400W Off-Road Audio Amplifier and Tower Speaker Kit with Bluetooth Controller

Take Amplified Audio on Your Off-Road Adventure

Our BAK400XL kit provides a complete, portable solution for streaming amplified Bluetooth audio. In addition to four 6.5" ProBox RGB Tower Speakers, the kit includes everything in our PBR400 kit, namely a 400 watt amp, Bluetooth® and USB/AUX modules that pop into any standard rocker switch slot, fuse holder, RGB LED controller, 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. Available for iOS and Android.

A Complete Audio Streaming Solution

Includes everything you need to stream Bluetooth + 300W amplified audio:

  • (4) 6.5” ProBox RGB Tower Speakers
  • 400W Amplifier
  • 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
  • Band clamps with rubber inserts to fit most applications

MSRP: $950

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.


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

RGB Tower Speaker

The four 6.5" RGB Tower Speakers create a dazzling light show that you can command with the free GLO•PRO app.


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
PBR300 Package

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
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Golf Carts

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Personal Watercraft

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