---
product_id: 51041422
title: "BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set"
brand: "boss audio systems"
price: "€ 878.56"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.fr/products/51041422-boss-audio-ask904b-64-500-w-4-channel-bluetooth-amplifier
store_origin: FR
region: France
---

# IPX7 water-resistant design Bluetooth wireless streaming 500W max power output BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set

**Brand:** boss audio systems
**Price:** € 878.56
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your soundscape—where power meets waterproof style!

## Quick Answers

- **What is this?** BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set by boss audio systems
- **How much does it cost?** € 878.56 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/51041422-boss-audio-ask904b-64-500-w-4-channel-bluetooth-amplifier)

## Best For

- boss audio systems enthusiasts

## Why This Product

- Trusted boss audio systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Marine-Grade Durability:** Built tough with weather-resistant materials and IPX7 rating, these speakers thrive in wet, rugged environments.
- • **Plug & Play Versatility:** Multiple AUX and low-level inputs ensure compatibility with all your devices—upgrade your sound system without hassle.
- • **Power-Packed Performance:** Unleash 500 watts of crystal-clear sound with the 4-channel MC900B amplifier, perfect for any marine or land adventure.
- • **Precision Audio Engineering:** 6.5-inch MR6W speakers with polycarbonate membranes and rubber surrounds deliver rich, distortion-free sound.
- • **Seamless Wireless Streaming:** Effortlessly connect via Bluetooth to your favorite apps like Spotify and Pandora—ditch the cables, keep the vibes flowing.

## Overview

The BOSS AUDIO ASK904B.64 is a robust 4-channel Bluetooth amplifier delivering up to 500 watts max power at 4 ohms, paired with two 180 watt MR6W marine-grade speakers. Designed for both water and land use, it features weather-resistant materials, IPX7 rating, and seamless wireless streaming compatibility with popular music apps, making it the ultimate sound upgrade for marine enthusiasts and audiophiles alike.

## Description

The 500 watt 4-channel Bluetooth amplifier package delivers clear sound, while the rubber surround ensures smooth resonance and durability. This set includes the Boss Audio Mc900B amplifier as well as a pair of Mr6W 6.5 inch speakers with poly carbon membrane and a rubber surround. The 4-ohm stable amplifier has 500 watts of power with a Mosfet power supply, ideal for water and land.

Review: Chulada - Exelente producto lo recomiendo se lo puse a una Road king y se escucha muy bien
Review: Great quality and price - Sounds really good for the price

## Features

- 4-channel amplifier MC900B 500 Watt Max Power at 4 Ω, RMS Power @ 4 Ohm, 4x 94 W Class A/B amplifier
- Speaker Set MR6 W 180 watt max 90 Watt RMS Power per pair
- Multifunction Bedienung
- AUX/Low Level Inputs
- Wireless Playback of music and apps such as Spotify, Pandora

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00VFZ09TG |
| Brand | BOSS Audio Systems |
| Customer Reviews | 4.4 out of 5 stars 629 Reviews |
| Global Trade Identification Number | 00791489123020 |
| Item Dimensions | 19.1 x 13.5 x 4.3 centimetres |
| Item Type Name | Boss Audio 500 Watt 4-Channel Bluetooth Amplifier MC900B and Two Pairs of 180 Watt MR6W Marine Speakers in Set |
| Item Weight | 10 Pounds |
| Item dimensions L x W x H | 19.1 x 13.5 x 4.3 centimetres |
| Manufacturer | BOSS AUDIO |
| Manufacturer Part Number | ASK904B.64 |
| Material | Plastic, weather-resistant material |
| Maximum Supply Voltage | 12 Volts (DC) |
| Maximum supply voltage | 12 Volts (DC) |
| Minimum Supply Voltage | 12 Volts |
| Minimum supply voltage | 12 Volts |
| Model Number | ASK904B.64 |
| Mounting Type | Tabletop |
| Mounting type | Tabletop |
| Number of Channels | 4 |
| Output Power | 500 Watts |
| Package Type Name | Box |
| Specification Met | IPX7 |
| UPC | 791489123020 |
| Voltage | 12 Volts |

## Product Details

- **Item dimensions L x W x H:** 19.1 x 13.5 x 4.3 centimetres
- **Manufacturer:** BOSS AUDIO
- **Maximum supply voltage:** 12 Volts (DC)
- **Minimum supply voltage:** 12 Volts
- **Voltage:** 12 Volts

## Images

![BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set - Image 1](https://m.media-amazon.com/images/I/81HL3vQdxBL.jpg)
![BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set - Image 2](https://m.media-amazon.com/images/I/91Tat1FCh1L.jpg)
![BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set - Image 3](https://m.media-amazon.com/images/I/91gYnp9mbUL.jpg)
![BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set - Image 4](https://m.media-amazon.com/images/I/810B6VwVUML.jpg)
![BOSS AUDIO ask904b.64 500 W 4-Channel Bluetooth Amplifier MC900B & Pair of 180 W MR6 W Marine Speakers Set - Image 5](https://m.media-amazon.com/images/I/81fBJINjcbL.jpg)

## Questions & Answers

**Q: I hooked this system up in my boat. It works great until i turn the boat motor on. Then it cuts in and out continuously. Ideas what might be wrong**
A: I’m having the exact same problem. With te engine off it works just fine but ad soon as I turn the engine on in cuts and turns off. 

I made a completely separate cable and connection straight from the battery and the problem persists. 

I have a voltage gauge and volts go from 12.6 with the engine off to 14.4 with te engine on which is just fine.

I even changed the voltage rectifier in my engine but the problem persists. 

Its definitely a problem with the amp.

**Q: If i install this without a head unit can i control the fade and balance with the inline multi-function remote?**
A: Not as far as I know !

**Q: What is the rms of the speakers?**
A: 10

**Q: Will the unit still work from a smart phone if the remote gets lost or broken.**
A: The remote is hardwired, if you lose it will not function

## Customer Reviews

### ⭐⭐⭐⭐⭐ Chulada
*by K***. on 15 May 2021*

Exelente producto lo recomiendo se lo puse a una Road king y se escucha muy bien

### ⭐⭐⭐⭐⭐ Great quality and price
*by G***G on 29 March 2026*

Sounds really good for the price

### ⭐⭐⭐⭐⭐ So far impressed and happy with purchase
*by D***N on 26 May 2026*

So far so good! Installed on 5/25/26. Sounds great. Straight forward install because all the wires in the harness are well labelled. Easy to connect my phone via Bluetooth. We will see how it holds up throughout the boating season.

## Frequently Bought Together

- BOSS Audio Systems ASK904B.64 Marine Boat 6.5 inch Speakers and 4 Channel Amplifier - 500 High Output, Bluetooth Remote, USB and Auxiliary, Waterproof Pouch
- FXC Waterproof Marine Boat Rocker Switch Aluminum Panel 5 Gang with Dual USB Slot Socket 3.1A + Volt Meter Blue LED Light for Car Rv Vehicles Truck (KG0149-5B Blue)
- 10 Gauge Marine Wire,10 AWG 30ft Duplex Marine Grade Wire Tinned Copper Oxygen-Free Insulated Red& Black Electrical Cable for Boat/Automotive/RV/Camper/Trailer

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-09-24*