---
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: "7741 kr"
currency: DKK
in_stock: true
reviews_count: 5
url: https://www.desertcart.dk/products/51041422-boss-audio-ask904b-64-500-w-4-channel-bluetooth-amplifier
store_origin: DK
region: Denmark
---

# Marine-grade durability Bluetooth wireless streaming 500W max power 4Ω 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:** 7741 kr
**Availability:** ✅ In Stock

## Summary

> 🌊 Turn your boat into the ultimate party zone with Boss Audio’s marine-grade power!

## 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?** 7741 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/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

- • **Compact & Concealed:** Sleek, space-saving amplifier design fits discreetly in your boat or vehicle, keeping your setup clean and stylish.
- • **Plug & Play Perfection:** Includes perfectly matched 180W marine speakers and easy AUX/USB inputs for instant, hassle-free installation.
- • **Power-Packed Precision:** 500W max output with 4x94W RMS Class A/B channels delivers crystal-clear sound that dominates any environment.
- • **Marine-Ready Resilience:** Rubber surround and polycarbonate membranes ensure your audio system withstands water, salt, and sun without skipping a beat.
- • **Seamless Wireless Vibes:** Effortlessly stream your favorite playlists from Spotify, Pandora, and more with built-in Bluetooth connectivity.

## Overview

The Boss Audio ASK904B.64 is a compact yet powerful 4-channel Bluetooth amplifier delivering up to 500 watts max power at 4 ohms, paired with a set of 180W marine-grade speakers. Designed for marine and land use, it features durable rubber surrounds, polycarbonate speaker membranes, and wireless streaming compatibility with popular apps. This all-in-one package offers easy installation, robust sound performance, and weather-resistant construction, making it the go-to audio upgrade for boaters and outdoor enthusiasts craving premium sound on the go.

## 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: Exelente producto lo recomiendo se lo puse a una Road king y se escucha muy bien
Review: After evaluating many options on the market, I bought this amplifier, read many reviews, and compare different options. I chose this one because it already had the speakers included. It is not easy to choose the right speaker for an amplifier since the amplifiers have RMS and nominal power, which changes if the speaker is 4 or 8. It is not easy to choose the right speaker, so I thought it was very good that already the amplifier will bring the speakers. Less task to acquire the whole set. I was surprised by the size of the amp. It is really small. I thought the sound would not be that good, but I was wrong. The sound surprised me! It is very good! My boat is a 21-foot bowrider type and with the engine running the old audio system just couldn't be heard, so I decided to change it for a better system, and this one works well. Pros: - The small size of the amp really makes it easy to hide it inside the boat - Bluetooth connection is extremely easy - The controls screen facilitates everything - It is a totally marine product - The speakers are easy to install and have the patterns to make the holes. - The USB connector is very good. Read MP3. - It is a very practical system and the sound is very good. Now my friends call it "the party boat" :) - the price is right. Cons - I don't have any for now.

## 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 4.4 out of 5 stars (612) |
| Date First Available | 1 April 2015 |
| Item Weight | 4.54 kg |
| Item model number | ASK904B.64 |
| Manufacturer | BOSS AUDIO |
| Manufacturer part number | ASK904B.64 |
| Model | ask904b 64 |
| Product Dimensions | 19.05 x 13.46 x 4.32 cm; 4.54 kg |
| Safety rating | não disponível |
| Special Features | Bluetooth, Wireless |
| Voltage | 12 Volts |
| Wattage | 500 watts |

## 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/81-CElty91L.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/A1W8ynU53sL.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/81kaZxPmKRL.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/81MSq4tVymL.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/71dNjeh8sgL.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

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

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

### ⭐⭐⭐⭐⭐ Review
*by B***S on 5 August 2021*

After evaluating many options on the market, I bought this amplifier, read many reviews, and compare different options. I chose this one because it already had the speakers included. It is not easy to choose the right speaker for an amplifier since the amplifiers have RMS and nominal power, which changes if the speaker is 4 or 8. It is not easy to choose the right speaker, so I thought it was very good that already the amplifier will bring the speakers. Less task to acquire the whole set. I was surprised by the size of the amp. It is really small. I thought the sound would not be that good, but I was wrong. The sound surprised me! It is very good! My boat is a 21-foot bowrider type and with the engine running the old audio system just couldn't be heard, so I decided to change it for a better system, and this one works well. Pros: - The small size of the amp really makes it easy to hide it inside the boat - Bluetooth connection is extremely easy - The controls screen facilitates everything - It is a totally marine product - The speakers are easy to install and have the patterns to make the holes. - The USB connector is very good. Read MP3. - It is a very practical system and the sound is very good. Now my friends call it "the party boat" :) - the price is right. Cons - I don't have any for now.

### ⭐⭐⭐⭐⭐ Review
*by M***A on 13 August 2024*

El producto esta fallando ¿Que debo hacer? Falla: Sube o Baja el volumen a extremos, reproduciendo MP3, en ocasiones sube el volumen al maximo de forma autonoma, sin mando del celular, y los controles del aparato no responden; lo mismo hace pero en sentido opuesto, baja el volumen al minimo (0), sin respondeer. ¿Como pueden ayudarme para resolver esta situacion?

## 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 Denmark*
*Store origin: DK*
*Last updated: 2026-03-07*