---
product_id: 16543816
title: "ASK904B.64"
brand: "boss audio systems"
price: "€ 404.47"
currency: EUR
in_stock: null
reviews_count: 9
category: "Boss Audio Systems"
url: https://www.desertcart.it/products/16543816-ask904b-64
store_origin: IT
region: Italy
---

# 500W max power x4 @4Ω 4-8Ω stable full-range output Weather-resistant IPX7 design ASK904B.64

**Brand:** boss audio systems
**Price:** € 404.47
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Elevate your adventure soundtrack—wherever life takes you!

## Quick Answers

- **What is this?** ASK904B.64 by boss audio systems
- **How much does it cost?** € 404.47 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/16543816-ask904b-64)

## 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

- • **Smart USB Charging:** Keep your devices powered on the go with a built-in USB charging port—never miss a beat or a call.
- • **Built for the Elements:** IPX7 weatherproof rating means your audio stays flawless rain or shine, on land or water.
- • **Powerhouse Performance:** Unleash 500 Watts max power across 4 channels for crystal-clear, room-filling sound anywhere.
- • **All-in-One Audio Solution:** Includes 2 pairs of 6.5” marine-grade full-range speakers with polypropylene cones and rubber surrounds for rich, durable sound.
- • **Seamless Bluetooth Streaming:** Ditch the head unit—stream Spotify, Pandora & more with the included Bluetooth remote control.

## Overview

The BOSS Audio ASK904B.64 is a compact, weatherproof 4-channel amplifier and marine speaker package delivering up to 500 Watts max power per channel. Featuring full-range 6.5” marine speakers, Bluetooth streaming with remote control, and a USB charging port, it’s engineered for rugged outdoor and marine environments with IPX7 protection. Perfect for millennials seeking premium sound on boats, ATVs, or outdoor setups without the hassle of a head unit.

## Description

Pump out the jams on your next adventure with the Boss Audio ASK904B.64 4-Channel Weatherproof All-Terrain Speaker and Amplifier package. This combo kit includes the MC900B Amplifier and 2-Pairs of MR6W 6.5" Full Range Marine Speakers with Poly Carbon Cone and Rubber Surround. The 4-Ohm stable Amplifier features 500 Watts Max Power with a MOSFET power supply to rock out on land or water. Plug into the MUSB35 USB to Aux Adapter to charge and play your USB-connected smartphone or other device. Bluetooth Audio Streaming lets you play your favorite music apps like Pandora or Spotify through the speakers. No need for an In-Dash Head Unit to play your music. Control it all with the Inline Multi-Function Remote Control. The ASK904B.64 Amplifier features weatherproof connectors to prevent corrosion and provide protection against the elements. Get out and go with the Boss Audio ASK904B.64. For further product details, please scroll down.

Review: Good Product! - 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: Great small system for my Waverunner install. - When brainstorming to add a stereo to my Yamaha Waveventure PWC, I came across this system and it seemed to fit my needs and the size of where I intended to put it. I wanted a way to listen to some music when floating or beached and didn't want to permanently modify my ski. So I installed this complete system in a spare front storage compartment. I'm also adding 2 3.5" speakers into a set of spare mirror housings. The system itself is small, light, and came with everything and seems to be well made, I'll update after use for some time and see how it holds up. For the price, I don't expect it to last forever. I tested it hooked to a YB14 series battery which is smaller than the one in my ski. I didn't hook up an ammeter, but this seems to draw very little power. I ran it on the bench via Bluetooth from my phone for 3 hours. Battery still showed 12.7 volts and charger said battery was still 95% capacity after the test. Battery drain being a concern, I'm very happy with this. The included speakers sound good. Not great, but as expected or better. For my needs, quite acceptable. The controls are easy to use. Blue tooth range is great. I tried it at up to 40 ft away and it worked fine. I'm pleased so far and have no complaints. Update 7/18/2017: One year later, still going strong and works as well as the day it was installed! Update 5/10/2018 Almost 2 years later and still works as well as it did when new. And it lives a rough wet life in the front of my Waverunner. It has been moved to my 98 XL1200 which uses the same front storage tub and gets a lot of looks, listens and thumbs up for having a stereo in my ski. I also put the small Polk audio 3.5” speakers I had in the mirrors of my wave venture in the mounting plate. Still love this setup! Update: 10/25/2018 Still working like New after another season in the ski. And in the off season I use it in my shop for a stereo. Still very happy! Update: 4/12/2019 Still going............. All winter in my shop. And now back in the ski for another season on the water. Still works perfectly! Update 7/29/2019 You guessed it.........still working perfectly.

## Features

- Amplifier Power - 500 Max x 4 @4-Ohms. USB charging port available. 4-8 Ohm Stable with RCA Outputs
- Bluetooth - You do not need a head unit. Just power up the amplifier and hook up some speakers to it. The included Bluetooth remote control lets you stream your music via your Bluetooth device and use apps like Spotify and Pandora
- Weather Resistant - The MC900B has been designed to handle some light weather conditions without giving up on you
- Class A/B Topology - Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal
- Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
- Auxiliary - The Bluetooth remote is compatible with the audio output from smartphones as well as MP3 players. Just plug in and start playing
- Amp Specs - Dimensions: 7.8” x 3.8” x 1.8”, Weight 2.9 lbs.
- Speaker Specs - Power: 180 watts per pair, Frequency: 80 Hz to 20 kHz, Sensitivity: 89 dB, Cone: Polypropylene, Voice Coil: 1”, Surround: Rubber, Dimensions: 3.4” x 7.5” x 7.5”, Mounting Depth: 2.2”, Mounting Hole: 5.8”
- BOSS Audio Systems provides a 6-year warranty on amplifiers and 3 years on speakers purchased is made on desertcart.com. We strongly encourage professional installation of this product to ensure proper and safe functionality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00VFZ09TG |
| Best Sellers Rank | #24,802 in Electronics ( See Top 100 in Electronics ) #6 in Marine Amplifiers |
| Brand | BOSS Audio Systems |
| Date First Available | March 30, 2015 |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00791489123020 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10 pounds |
| Item dimensions L x W x H | 7.5 x 5.3 x 1.7 inches |
| Item model number | ASK904B.64 |
| Manufacturer | BOSS Audio Systems |
| Material | Plastic |
| Mounting Type | Flush Mount |
| Number of Channels | 4 |
| Output Power | 500 Watts |
| Package Type Name | Box |
| Product Dimensions | 7.5 x 5.3 x 1.7 inches |
| Specification Met | Ipx7 |
| UPC | 791489123020 |
| Voltage | 12 Volts |

## Product Details

- **Brand:** BOSS Audio Systems
- **Item dimensions L x W x H:** 7.5 x 5.3 x 1.7 inches
- **Manufacturer:** BOSS Audio Systems
- **Mounting Type:** Flush Mount
- **Voltage:** 12 Volts

## Images

![ASK904B.64 - Image 1](https://m.media-amazon.com/images/I/411S9++S3BL.jpg)
![ASK904B.64 - Image 2](https://m.media-amazon.com/images/I/513x4cpYYiL.jpg)
![ASK904B.64 - Image 3](https://m.media-amazon.com/images/I/51KNtoacsGL.jpg)
![ASK904B.64 - Image 4](https://m.media-amazon.com/images/I/51j4cUhHY9L.jpg)
![ASK904B.64 - Image 5](https://m.media-amazon.com/images/I/51z5OQ58PpL.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

### ⭐⭐⭐⭐⭐ Good Product!
*by B***S on August 5, 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.

### ⭐⭐⭐⭐⭐ Great small system for my Waverunner install.
*by P***T on July 11, 2016*

When brainstorming to add a stereo to my Yamaha Waveventure PWC, I came across this system and it seemed to fit my needs and the size of where I intended to put it. I wanted a way to listen to some music when floating or beached and didn't want to permanently modify my ski. So I installed this complete system in a spare front storage compartment. I'm also adding 2 3.5" speakers into a set of spare mirror housings. The system itself is small, light, and came with everything and seems to be well made, I'll update after use for some time and see how it holds up. For the price, I don't expect it to last forever. I tested it hooked to a YB14 series battery which is smaller than the one in my ski. I didn't hook up an ammeter, but this seems to draw very little power. I ran it on the bench via Bluetooth from my phone for 3 hours. Battery still showed 12.7 volts and charger said battery was still 95% capacity after the test. Battery drain being a concern, I'm very happy with this. The included speakers sound good. Not great, but as expected or better. For my needs, quite acceptable. The controls are easy to use. Blue tooth range is great. I tried it at up to 40 ft away and it worked fine. I'm pleased so far and have no complaints. Update 7/18/2017: One year later, still going strong and works as well as the day it was installed! Update 5/10/2018 Almost 2 years later and still works as well as it did when new. And it lives a rough wet life in the front of my Waverunner. It has been moved to my 98 XL1200 which uses the same front storage tub and gets a lot of looks, listens and thumbs up for having a stereo in my ski. I also put the small Polk audio 3.5” speakers I had in the mirrors of my wave venture in the mounting plate. Still love this setup! Update: 10/25/2018 Still working like New after another season in the ski. And in the off season I use it in my shop for a stereo. Still very happy! Update: 4/12/2019 Still going............. All winter in my shop. And now back in the ski for another season on the water. Still works perfectly! Update 7/29/2019 You guessed it.........still working perfectly.

### ⭐⭐⭐⭐⭐ Absolutely great sound for the price.
*by L***R on March 18, 2025*

Installed in my new 2025 Avid Rogue 20. Install was SUPER easy. I watched like 3 videos and felt like i had the jist of it. Mounted to the center console and it's pretty loud. I have a yamaha 150 and even WOT the music is easily audible. For the price, this is it. IF you're an audiophile, or looking for a better bass response, you're gonna have to add a sub and amp.

## 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 Italy*
*Store origin: IT*
*Last updated: 2026-01-26*