---
product_id: 1761663
title: "BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers and Amplifier Sound System – Class D Amplifier, Weatherproof, Volume Control, ATV UTV Compatible"
brand: "boss audio systems"
price: "€ 203.61"
currency: EUR
in_stock: true
reviews_count: 10
category: "Boss Audio Systems"
url: https://www.desertcart.de/products/1761663-boss-audio-systems-mc420b-3-inch-motorcycle-speakers-and-amplifier
store_origin: DE
region: Germany
---

# 25m Bluetooth wireless range 600W max output power Advanced weatherproof design BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers and Amplifier Sound System – Class D Amplifier, Weatherproof, Volume Control, ATV UTV Compatible

**Brand:** boss audio systems
**Price:** € 203.61
**Availability:** ✅ In Stock

## Summary

> 🏍️ Turn your ride into a rolling concert—because silence is so last season!

## Quick Answers

- **What is this?** BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers and Amplifier Sound System – Class D Amplifier, Weatherproof, Volume Control, ATV UTV Compatible by boss audio systems
- **How much does it cost?** € 203.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/1761663-boss-audio-systems-mc420b-3-inch-motorcycle-speakers-and-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

- • **Plug & Play Versatility:** Compatible with smartphones, MP3 players, and ATV/UTV handlebars (.75”–1.25”) for ultimate convenience.
- • **Seamless Wireless Control:** Bluetooth connectivity with a 25-meter range lets you stream your favorite playlists effortlessly.
- • **Built to Brave the Elements:** State-of-the-art weatherproofing ensures your sound system performs rain or shine.
- • **Ride with Power-Packed Sound:** Experience crystal-clear 600W max output that dominates the road and turns heads.
- • **Customizable Volume at Your Fingertips:** Inline volume control mounts where you want it for safe, on-the-go adjustments.

## Overview

The BOSS Audio Systems MC420B is a compact, weatherproof 3-inch motorcycle speaker and Class D amplifier system delivering up to 600 watts of power. Featuring Bluetooth wireless streaming with a 25-meter range, inline volume control, and durable mounting brackets for handlebars between .75” and 1.25”, it’s designed for motorcycles, ATVs, and UTVs. Backed by a 3-year platinum warranty, this system offers professional-grade sound quality and rugged reliability for riders who demand both performance and style.

## Description

BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers and Amplifier Sound System – Class D Amplifier, Weatherproof, Volume Control, ATV UTV Compatible

Review: 2008 Harley Davidson Sportster 1200 Install! - Quality product! Sound is awesome for a $60 system, at 40mph and lower its great. It's plenty loud enough, but as you approach 60 mph and up truth is no stereo is going to sound like a home audiophile system. Bottom line is 'buy it'! Customer service is first rate, they are great! Also, I read some complaints about bass. When I first connected the speakers they too sounded a bit flat. I clicked onto my Poweramp music player and set it to large concert hall and max bass and presto... truly impressive rich sound! My install - I mounted the speakers on the handlebars just inside the windshield. Then, ran all the wires and the amp into a small, front fork mounted, 'tool bag' type pouch. The main issue is the red hot wire. I must have watched a dozen youtube videos on this subject. I usually ride with my high beam on. I know its obnoxious, but down here in Florida anything you can do to stay visible is a life saver. I unscrewed the chrome cover that holds the daymaker headlight in place. Sadly, Harley does not provide an auxiliary wire in the headlight wiring harness of Sportster's. At least not in mine. There are three wires entering the headlight assembly from a hole in the back. Black wire is ground, white wire is High Beam, yellow wire is Low Beam. I used a plastic splice connector from Home Depot to connect the red Boss power wire to the white High Beam wire. (AMP Splice Tap Connectors 10 pack). The hole in the back of the headlight assembly where Harley runs the headlight wires - Harley runs the wire harness though the hole with a rubber bushing that protects the wires and keeps water from getting in. I tried to slice the rubber bushing so that I could add the Boss red hotwire but it was cramped quarters and I couldnt get in there without taking the chance of cutting the headlight wires also. You may be able to do it, I couldn't. I ran the red power wire through the hole and at the point where it touched the metal headlight housing I covered the wire with an extra couple of layers of electrical tape to protect it from the housing wearing through the insulation and shorting the amp. Then, pushed the rubber bushing back into the hole. It wasn't a perfect fit, there was a slight gap because of the red wire I installed. It also wasn't a terrible fit - and then I put the headlight and headlight retainer back into place. After continual testing at every stage, and when I was sure all worked as it should, I used a dab of black silicone caulk and filled in the gap between the rubber bushing and the outside of the headlight assembly. This also helped hold the red power wire in place and reduce any chance of shorting against the headlight casing. I ran the ground wire outside the headlight housing for a few inches to a windshield mounting bolt and tightened it down. (I didn't want the ground wire taking up space going through the headlight hole, so I split the red power wire and the ground wire before the power wire entered the headlight housing hole. You may find it works just fine running both wires through, especially after using caulk to close up the hole where the wires enter.) Finally, I used zip ties to connect the volume button to the left side windshield mount, very close to where my hand naturally fits onto the handlebar grip. I believe you want the volume control where your left hand can safely get to it without too much reaching. Final result is my Boss audio system works only when the high beam is on. And when the bike is turned off there is no chance of the amp staying on and draining the battery. Also, my install required no drilling, no running wires under gas tanks and seats, and no toggle switch. I love having music now!!! Safe riding!
Review: Great wuality speaker - These speakers are perfect! I bought them and installed them on my KLR. They were a little difficult to install on the handle bars because of the thick rubber strips to reduce size but once I got the nut started, I was able to tighten them without issues and they are extremely sturdy. The sound quality is amazing and I can hear my music while cruising at 75. The Bluetooth connectivity is great! Cable hookup is straightforward and didn’t have any issues with wiring.

## Features

- Bluetooth - Play and control a vast library of your favorite music using your smartphone or MP3 device, plus plug into apps like Spotify and Pandora wirelessly
- Amplified - A Bluetooth, compact, weatherproof, class D amplifier is included. It has been sealed with the latest weatherproofing techniques to protect against a rainy forecast
- Weatherproof - The MC420B has been outfitted with the latest weatherproofing techniques for protection against the elements
- Speakers - Also included are two 3-inch chrome full range speakers. The adjustable brackets will fit handlebars from ranging from .75” to 1.25”
- Playback - A 3.5 mm Auxiliary input located on the side of the amplifier is compatible with audio outputs of smartphones and MP3 players
- Volume Control - A convenient inline volume control (attached to the amplifier) can be installed in a place of your choosing, making sure that when the need hits… so will your tunes
- 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 | B00IBI50NK |
| Additional Features | Bluetooth |
| Antenna Location | Volume |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Battery Average Life | 10 years |
| Best Sellers Rank | #2 in Powersports Speaker Systems |
| Bluetooth Range | 25 Meters |
| Brand | BOSS Audio Systems |
| Built-In Media | BOSS AUDIO MC420B |
| Color | Silver |
| Compatible Devices | Smartphone, Tablet, MP3 Player |
| Compatible with Vehicle Type | ATV, UTV |
| Connectivity Protocol | Bluetooth |
| Connectivity Technology | Bluetooth |
| Control Method | App |
| Controller Type | Remote Control |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.3 4.3 out of 5 stars (7,087) |
| Enclosure Material | Metal |
| Global Trade Identification Number | 00791489121842 |
| Impedance | 4 Ohms |
| Input Voltage | 12 Volts |
| Is Electric | No |
| Is Waterproof | FALSE |
| Item Dimensions D x W x H | 4.5"D x 4"W x 4"H |
| Item Type Name | BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers and Amplifier Audio Sound System – Class D Compact Amplifier, Weatherproof, Volume Control, ATV UTV Compatible, For Stereo, Tweeters |
| Item Weight | 4 Pounds |
| MP3 player | No |
| Manufacturer | BOSS Audio Systems |
| Maximum Range | 25 Meters |
| Model Name | MC420B |
| Model Number | MC420B |
| Mounting Type | Handlebar Mount |
| Number Of Circuits | 2 |
| Number of Audio Channels | 3.0 |
| Number of Batteries | 1 12V batteries required. |
| Number of Items | 2 |
| Number of Power Levels | 2 |
| Power Source | Battery Powered |
| Signal-to-Noise Ratio | 85 |
| Speaker Maximum Output Power | 600 Watts |
| Speaker Size | 3 Inches |
| Speaker Type | Tweeter |
| Specific Uses For Product | personal, gaming, business |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 3 Inches |
| Tweeter Diameter | 3 Inches |
| UPC | 791489121842 801940118035 506087193098 012304293811 804892188439 |
| Unit Count | 1.0 Count |
| Warranty Description | 3 YEAR PLATINUM DEALER WARRANTY |
| Warranty Type | Extended |
| Water Resistance Level | Water Resistant |
| Wireless Technology | Bluetooth |
| Woofer Diameter | 3 Inches |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** BOSS Audio Systems
- **Connectivity Technology:** Bluetooth
- **Input Voltage:** 12 Volts
- **Speaker Maximum Output Power:** 600 Watts

## Images

![BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers and Amplifier Sound System – Class D Amplifier, Weatherproof, Volume Control, ATV UTV Compatible - Image 1](https://m.media-amazon.com/images/I/71IxQJmm9TL.jpg)

## Available Options

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

## Questions & Answers

**Q: Has anyone tried to mount these on a Harley engine guard?  Any issues?**
A: I mounted these on the engine guard of a Yamaha V-star. It works ok. But volume and clarity much improved when I moved them to the handle bars behind the windshield. When I had them mounted lower,on the engine guard,  to much distortion at highway speeds.

**Q: Would you be willing to just sell the amp part?  Stored over the winter and mice ate through the volume control and some other main wires.**
A: Hello,

I am looking through all of our options, and I did not find the amp by itself. 

Thank You.

**Q: Well this work on my Honda 1100 with a windshield? Are they water proof?**
A: I have this system install on my 2000 Honda VT1100C3 with a windshield it has work great sound is clean and loud, I install the speakers on the engine guard, the amp on the fork bag and the volume on the tool cover.

**Q: I just installed this and one speaker is already blown!**
A: Sometimes they go out and come back in

## Customer Reviews

### ⭐⭐⭐⭐⭐ 2008 Harley Davidson Sportster 1200 Install!
*by D***N on April 7, 2019*

Quality product! Sound is awesome for a $60 system, at 40mph and lower its great. It's plenty loud enough, but as you approach 60 mph and up truth is no stereo is going to sound like a home audiophile system. Bottom line is 'buy it'! Customer service is first rate, they are great! Also, I read some complaints about bass. When I first connected the speakers they too sounded a bit flat. I clicked onto my Poweramp music player and set it to large concert hall and max bass and presto... truly impressive rich sound! My install - I mounted the speakers on the handlebars just inside the windshield. Then, ran all the wires and the amp into a small, front fork mounted, 'tool bag' type pouch. The main issue is the red hot wire. I must have watched a dozen youtube videos on this subject. I usually ride with my high beam on. I know its obnoxious, but down here in Florida anything you can do to stay visible is a life saver. I unscrewed the chrome cover that holds the daymaker headlight in place. Sadly, Harley does not provide an auxiliary wire in the headlight wiring harness of Sportster's. At least not in mine. There are three wires entering the headlight assembly from a hole in the back. Black wire is ground, white wire is High Beam, yellow wire is Low Beam. I used a plastic splice connector from Home Depot to connect the red Boss power wire to the white High Beam wire. (AMP Splice Tap Connectors 10 pack). The hole in the back of the headlight assembly where Harley runs the headlight wires - Harley runs the wire harness though the hole with a rubber bushing that protects the wires and keeps water from getting in. I tried to slice the rubber bushing so that I could add the Boss red hotwire but it was cramped quarters and I couldnt get in there without taking the chance of cutting the headlight wires also. You may be able to do it, I couldn't. I ran the red power wire through the hole and at the point where it touched the metal headlight housing I covered the wire with an extra couple of layers of electrical tape to protect it from the housing wearing through the insulation and shorting the amp. Then, pushed the rubber bushing back into the hole. It wasn't a perfect fit, there was a slight gap because of the red wire I installed. It also wasn't a terrible fit - and then I put the headlight and headlight retainer back into place. After continual testing at every stage, and when I was sure all worked as it should, I used a dab of black silicone caulk and filled in the gap between the rubber bushing and the outside of the headlight assembly. This also helped hold the red power wire in place and reduce any chance of shorting against the headlight casing. I ran the ground wire outside the headlight housing for a few inches to a windshield mounting bolt and tightened it down. (I didn't want the ground wire taking up space going through the headlight hole, so I split the red power wire and the ground wire before the power wire entered the headlight housing hole. You may find it works just fine running both wires through, especially after using caulk to close up the hole where the wires enter.) Finally, I used zip ties to connect the volume button to the left side windshield mount, very close to where my hand naturally fits onto the handlebar grip. I believe you want the volume control where your left hand can safely get to it without too much reaching. Final result is my Boss audio system works only when the high beam is on. And when the bike is turned off there is no chance of the amp staying on and draining the battery. Also, my install required no drilling, no running wires under gas tanks and seats, and no toggle switch. I love having music now!!! Safe riding!

### ⭐⭐⭐⭐⭐ Great wuality speaker
*by C***E on April 5, 2026*

These speakers are perfect! I bought them and installed them on my KLR. They were a little difficult to install on the handle bars because of the thick rubber strips to reduce size but once I got the nut started, I was able to tighten them without issues and they are extremely sturdy. The sound quality is amazing and I can hear my music while cruising at 75. The Bluetooth connectivity is great! Cable hookup is straightforward and didn’t have any issues with wiring.

### ⭐⭐⭐⭐⭐ Great system for my Kawasaki Mule SX
*by B***N on February 17, 2019*

I wanted a system that would give me clean music at normal listening levels and that would not draw excessive amps doing it. My Mule, and most motorcycles have batteries and charging systems are not designed for excessive amp drain. ( the Boss Audio MCBK420B only draws 4-5 amps) . I chose the Boss Audio MCBK420B Bluetooth system for my 2019 Kawasaki Mule and I am very happy with my choice . I installed the amp inside the glove box. In the dash mounted the volume control along with an additional on/off toggle switch. The 12v power is supplied thru a relay that is activated by the ignition switch per the instructions. I added the fore mentioned SPST toggle switch inline so I can manually turn off the amp when not needed. The speakers are clamped to a round frame under the dash that allowed them to face the occupants. I secured all wiring with ty wraps. This system is just what I was looking for. Music is clear, clean and it will play louder than I care to listen. The bass is a little lacking but sound quality is excellent for this size speaker system . Great bang for the buck and easy to install. The amp , speakers ,mounts and wiring in the kit are all good quality pieces and instructions make it relatively easy to install. If your looking for a nice minimalist sound system to enjoy some tunes in your UTV or SxS I would recommend you check this system out. If your looking for bone shaking bass and enough volume to scare the animals this system is probably not going to meet your needs. Happy Trails

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-04-23*