---
product_id: 35626401
title: "BOSS Audio Systems MCBK520B Motorcycle 3 Inch Stereo Speakers and Amplifier Audio Sound System - Bluetooth 2 Channel Amplifier, Weatherproof, FM Tuner, USB, SD, Auxiliary In, ATV UTV Compatible"
brand: "boss audio systems"
price: "¥59544"
currency: JPY
in_stock: true
reviews_count: 11
category: "Boss Audio Systems"
url: https://www.desertcart.jp/products/35626401-boss-audio-systems-mcbk520b-motorcycle-3-inch-stereo-speakers-amplifier
store_origin: JP
region: Japan
---

# Built-in FM tuner & Bluetooth 3-inch full-range speakers Weatherproof for all conditions BOSS Audio Systems MCBK520B Motorcycle 3 Inch Stereo Speakers and Amplifier Audio Sound System - Bluetooth 2 Channel Amplifier, Weatherproof, FM Tuner, USB, SD, Auxiliary In, ATV UTV Compatible

**Brand:** boss audio systems
**Price:** ¥59544
**Availability:** ✅ In Stock

## Summary

> 🏍️ Amplify your adventure with sound that rides shotgun!

## Quick Answers

- **What is this?** BOSS Audio Systems MCBK520B Motorcycle 3 Inch Stereo Speakers and Amplifier Audio Sound System - Bluetooth 2 Channel Amplifier, Weatherproof, FM Tuner, USB, SD, Auxiliary In, ATV UTV Compatible by boss audio systems
- **How much does it cost?** ¥59544 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/35626401-boss-audio-systems-mcbk520b-motorcycle-3-inch-stereo-speakers-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 Powerhouse:** Class A/B 2-channel amplifier delivers crisp, powerful sound without hogging handlebar space—sleek installation, maximum impact.
- • **Ride the Soundwave:** Seamlessly stream your favorite playlists via Bluetooth or plug in with aux, USB, or SD card for endless road trip vibes.
- • **Control at Your Fingertips:** Wireless remote lets you manage your music safely and effortlessly, whether you’re riding solo or sharing the journey.
- • **Stay Tuned, Stay Connected:** Integrated FM tuner keeps you in the loop with live news, sports, and music, so you never miss a beat on the road.
- • **Built to Brave the Elements:** Advanced weatherproof design means your soundtrack never stops, rain or shine—because your ride deserves premium audio no matter what.

## Overview

The BOSS Audio Systems MCBK520B is a rugged, weatherproof 3-inch motorcycle speaker and amplifier system featuring Bluetooth connectivity, FM tuner, USB/SD inputs, and auxiliary compatibility. Designed for handlebar mounting, it delivers powerful, clear audio through a compact Class A/B 2-channel amplifier, perfect for motorcycles, ATVs, and UTVs. With a wireless remote and durable construction, it ensures your music stays loud and clear on every ride, backed by a 3-year warranty.

## Description

Buy BOSS Audio Systems MCBK520B Motorcycle 3 Inch Stereo Speakers and Amplifier Audio Sound System - Bluetooth 2 Channel Amplifier, Weatherproof, FM Tuner, USB, SD, Auxiliary In, ATV UTV Compatible: Coaxial Speakers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Fantastic for the money - Well I finally had a chance to get out on the road with this today. The volume was impressive I could not stand to listen to it at full volume at 55 MPH. The tone is a little "trebeley". but that is to be expected from a 3" speaker that is doing the full range of sound. The bluetooth worked well and the FM tuner is okay. I have not tried the USB or SD cards yet. I suggest going on Boss Audio's web site and reading the owners manual to fully understand this unit's limitations. I had to fabricate a bracket out of a piece of 18 GA stainless steel to mount the amp. You can see it in the pictures. I noticed that the reviews seemed to cover several models all lumped into one group. The unit comes with a 7.5 amp inline fuse in case you are worried about amp draw on your system. You can't really hide the MC520B in a saddle bag because of needing to get to the controls unless you just wanted to use the remote. I thought the remote would be dangerous to use on the road as a driver. However my wife loved being able to control things from the back seat. I will try and update this later and see about durability. For the price, you can't go wrong with this. Update: I got some SD cards to use with this and loaded a bunch of music. I had a problem with it just sampling the first 5 to 10 seconds of each song. I went back and converted all of them to MP3 format and it works great.
Review: Good quality sound - I can hear on my Harley with Vance and Hines pipe doing 75 mph. Base isn’t the best but has quality sound. Wires are a little short though.

## Features

- Bluetooth - use your smartphone or MP3 player and Get access to a vast library of your favorite music, plus plug into apps like Spotify and Pandora, wirelessly. The 3.5 mm aux input is also compatible with the audio out of your devices
- Weatherproof - the MCBK520B has been outfitted with the latest weatherproofing techniques for protection against the elements. Rain or snow, take your music wherever you go
- Speakers - The two 3-inch matte black full range speakers have adjustable brackets that will fit handlebars ranging from .75” to 1.25”
- Amplifier - the 2 Channel Bluetooth, compact, Weatherproof, class A/B amplifier is small enough for an out of the way Installation
- Fm tuner - tune into FM radio station for up to date music, Sport, news, weather and other entertainment
- USB/SD - The USB and SD ports support up to 32 GB of memory so that when you hit the road, your music can follow
- Aux in - compatible with the audio output from smartphones as well as MP3 players. Just plug in and start playing
- Remote control - a convenient wireless multi-function remote control lets you control your music wirelessly
- Warranty - BOSS Audio Systems provides a powerful 3-year platinum online dealer warranty so long as the purchase is made through desertcart.com. We strongly encourage professional installation of this product to ensure proper and safe functionality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DT4P634 |
| Audio Driver Type | Dynamic Driver |
| Batteries | 1 CR2 batteries required. |
| Best Sellers Rank | #227 in Powersports Speaker Systems |
| Color | Black |
| Compatible Devices | MP3 Player, Phones, Smartphone, Television |
| Control Method | Remote |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,026) |
| Date First Available | May 17, 2016 |
| EU Spare Part Availability Duration | 3 Years |
| Global Trade Identification Number | 00791489124379 |
| Impedance | 4 Ohms |
| Included Components | Remote control, Brackets, User manual |
| Input Voltage | 12 Volts |
| Is Discontinued By Manufacturer | No |
| Is Waterproof | Yes |
| Item Weight | 4.5 pounds |
| Item model number | MCBK520B |
| Manufacturer | BOSS Audio Systems |
| Material | Platinum |
| Model Name | MCBK520B |
| Mounting Type | Handlebar Mount |
| Number Of Circuits | 2 |
| Number of Batteries | 1 CR2 batteries required. |
| Number of Items | 4 |
| Number of Power Levels | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 5"D x 3"W x 1.5"H |
| Recommended Uses For Product | For Music Players |
| Set Name | Single Set |
| Shape | Rectangular |
| Speaker Size | 3 Inches |
| Speaker Type | Outdoor |
| Special Feature | Amplified, Bluetooth, Weatherproof |
| Specific Uses For Product | For Motorcycles, Scooters, ATVs, and Golf Carts, as well as for Music Players during Road Trips and Off-Road Adventures |
| Style | (2) 3" Black Speakers + Class A/B Amp |
| Subwoofer Connectivity Technology | Wireless |
| Subwoofer Diameter | 3 Inches |
| Surround Sound Channel Configuration | 3.0 |
| Tweeter Diameter | 1 Inches |
| UPC | 791489124379 |
| Unit Count | 4.0 Count |
| Warranty Type | Extended |
| Water Resistance Level | Water Resistant |
| Wireless Communication Technology | Bluetooth |
| Woofer Diameter | 3 Inches |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** BOSS Audio Systems
- **Connectivity Technology:** Auxiliary, Bluetooth
- **Frequency Response:** 15 KHz
- **Speaker Maximum Output Power:** 600 Watts

## Images

![BOSS Audio Systems MCBK520B Motorcycle 3 Inch Stereo Speakers and Amplifier Audio Sound System - Bluetooth 2 Channel Amplifier, Weatherproof, FM Tuner, USB, SD, Auxiliary In, ATV UTV Compatible - Image 1](https://m.media-amazon.com/images/I/81oBsrZawaL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: The blue tooth broke on it how do I fix it**
A: Hello,
Please contact the Boss Audio Technical Support Team via telephone regarding the issue you are experiencing, so we may further assist you. You may find our phone number on our company website. Scroll to the bottom of the home page and under "ENGAGE WITH US," click on "Contact Us."
Thank you!

**Q: Is this water proof?**
A: The MCBK520B is weatherproof, both speakers and amp are able to resist the penetration of water to some degree but not entirely.

**Q: How long are the speaker wires**
A: Hello,
About 36 inches.
Thank you.

**Q: Does it play fm radio & have a built in antenna?**
A: Yes, the MCBK520B features a built-in radio and antenna.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic for the money
*by W***N on March 20, 2017*

Well I finally had a chance to get out on the road with this today. The volume was impressive I could not stand to listen to it at full volume at 55 MPH. The tone is a little "trebeley". but that is to be expected from a 3" speaker that is doing the full range of sound. The bluetooth worked well and the FM tuner is okay. I have not tried the USB or SD cards yet. I suggest going on Boss Audio's web site and reading the owners manual to fully understand this unit's limitations. I had to fabricate a bracket out of a piece of 18 GA stainless steel to mount the amp. You can see it in the pictures. I noticed that the reviews seemed to cover several models all lumped into one group. The unit comes with a 7.5 amp inline fuse in case you are worried about amp draw on your system. You can't really hide the MC520B in a saddle bag because of needing to get to the controls unless you just wanted to use the remote. I thought the remote would be dangerous to use on the road as a driver. However my wife loved being able to control things from the back seat. I will try and update this later and see about durability. For the price, you can't go wrong with this. Update: I got some SD cards to use with this and loaded a bunch of music. I had a problem with it just sampling the first 5 to 10 seconds of each song. I went back and converted all of them to MP3 format and it works great.

### ⭐⭐⭐⭐⭐ Good quality sound
*by A***R on November 20, 2025*

I can hear on my Harley with Vance and Hines pipe doing 75 mph. Base isn’t the best but has quality sound. Wires are a little short though.

### ⭐⭐⭐⭐ A nice motorcycle stereo - loud enough and compact
*by R***T on September 21, 2018*

I installed this stereo on my 1997 Honda Shadow ACE 1100, and it works very well. Install: I had to improvise a little mounting the speakers on the handlebars - the brackets were too big to clamp down on the handlebars, and the rubber-spacing strips included were too thin, and too thick. So I cut some strips from an orange rubber mat I just happened to have, that were just the right thickness. I ran the speaker cables under the gas tank, and under the seat. The included wires were just barely long enough, with the connectors ending up under the seat (beside the air filter, which is centered under the seat on this bike). I mounted the main box of the stereo in my saddle bag so it's out of the way and protected (I'll control it with the wireless remote). I had read some reviews that the unit still draws a little power even when it's turned off, which drains the motorcycle battery - therefore I installed an extra switch that totally disconnects it from the battery (I installed this in the corner of my saddlebag, so I can snake my finger in and turn it on/off without opening the saddlebag. Use: The main feature I liked on this stereo is that it will play mp3 files on an SD card (you could also put them on a USB stick, but that sticks out farther, and prevents the protective waterproof rubber cover from fitting). It's also cool that it has an FM stereo in case I get tired of my songs (be sure to read the directions on scanning/pre-programming the local FM channels!) I just use an old flip-phone so I haven't tried playing music via bluetooth yet, so I can't say how easy/good that is. One thing I was pleased to find is that when I turn it off/on via my power kill switch, it still remembers what song I was playing on the SD card, and resumes where I left off. The wireless remote is a nice touch - right now I've got it hanging from the handlebar, but I might put it in a more secure place later. Seems to be a pretty cool little stereo - I recommend it!

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-15*