---
product_id: 1761663
title: "BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package"
brand: "boss audio systems"
price: "26630 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Boss Audio Systems"
url: https://www.desertcart.is/products/1761663-boss-audio-systems-mc420b-3-inch-motorcycle-speakers-class-d
store_origin: IS
region: Iceland
---

# 25m Bluetooth wireless range 600W max output power Advanced weatherproof design BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package

**Brand:** boss audio systems
**Price:** 26630 kr
**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, Class D Amp Package by boss audio systems
- **How much does it cost?** 26630 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/1761663-boss-audio-systems-mc420b-3-inch-motorcycle-speakers-class-d)

## 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

- • **Customizable Handlebar Fit:** Adjustable brackets fit handlebars from 0.75” to 1.25” for a sleek, secure installation tailored to your bike.
- • **Built to Brave the Elements:** Engineered with cutting-edge weatherproofing so your soundtrack never stops, rain or shine.
- • **Seamless Wireless Streaming:** Connect effortlessly via Bluetooth up to 25 meters—your playlist, your ride, no strings attached.
- • **Ride with Power-Packed Sound:** Experience booming 600 watts of crystal-clear audio that cuts through the roar of the road.
- • **Intuitive Inline Volume Control:** Keep your focus on the road with conveniently placed volume control exactly where your hand naturally rests.

## Overview

The BOSS Audio Systems MC420B is a compact, weatherproof 3-inch motorcycle speaker and Class D amplifier package delivering up to 600 watts of stereo sound. Featuring Bluetooth connectivity with a 25-meter range, adjustable handlebar mounts, and an inline volume control, it’s designed for seamless integration on motorcycles, ATVs, and UTVs. Backed by a 3-year platinum warranty, this system ensures your favorite music rides shotgun, no matter the weather.

## 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: Sound quality - I don’t write reviews with this being my first ever. I have been on the fence with purchasing these speakers for 5-6 months. I pulled the trigger and figured I could always return if not satisfied. If it sounds to good to be true, it usually is. 1st. The installation did take some time. I put these on my Harley Davidson Fatboy Motorcycle. Its was not as easy on a motorcycle as described. The module although small just took lots of time with getting it to fit under my seat. Very tight fit. 2nd: Getting the speaker on the bars should be done with someone who can help. This to was quite a hassle when doing it alone. Be aware that the wiring harness is on the short end. Longer wiring harness could make this a lot easier and or give you more options for alternative placement other then under the seat. Maybe in the saddle bags if harness was longer. 3 rd: Not much bass. All in all I have to give these speakers a 5 star review. Video is with volume only at 70%. I do have them on my bars and I do have a batwing which I’m sure helps with wind drowning. My speed got to about 60mph and they sound great. For the price, you cant go wrong!! 5 ⭐️

## 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 | #6 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 | 4.2 out of 5 stars 3,412 Reviews |
| EU Spare Part Availability Duration | 3 years |
| Enclosure Material | Metal |
| Frequency Response | 15 KHz |
| Global Trade Identification Number | 00791489121842 |
| Impedance | 4 ohm |
| Input Voltage | 12 volts |
| 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 |
| 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 |
| 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 | Outdoor |
| Specific Uses For Product | personal, gaming, business |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 3 inches |
| Tweeter Diameter | 3 inches |
| UPC | 791489121842 801940118035 506087193098 779422928048 012304293811 804892188439 |
| Unit Count | 6 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
- **Frequency Response:** 15000 hertz
- **Speaker Maximum Output Power:** 600 watts

## Images

![BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package - Image 1](https://m.media-amazon.com/images/I/71IxQJmm9TL.jpg)
![BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package - Image 2](https://m.media-amazon.com/images/I/81YhKmGMdFL.jpg)
![BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package - Image 3](https://m.media-amazon.com/images/I/711nuqPvviL.jpg)
![BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package - Image 4](https://m.media-amazon.com/images/I/71fjcRxF0ML.jpg)
![BOSS Audio Systems MC420B 3 Inch Motorcycle Speakers, Class D Amp Package - Image 5](https://m.media-amazon.com/images/I/71KuWjK2DGL.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!

### ⭐⭐⭐⭐⭐ Sound quality
*by J***H on May 4, 2026*

I don’t write reviews with this being my first ever. I have been on the fence with purchasing these speakers for 5-6 months. I pulled the trigger and figured I could always return if not satisfied. If it sounds to good to be true, it usually is. 1st. The installation did take some time. I put these on my Harley Davidson Fatboy Motorcycle. Its was not as easy on a motorcycle as described. The module although small just took lots of time with getting it to fit under my seat. Very tight fit. 2nd: Getting the speaker on the bars should be done with someone who can help. This to was quite a hassle when doing it alone. Be aware that the wiring harness is on the short end. Longer wiring harness could make this a lot easier and or give you more options for alternative placement other then under the seat. Maybe in the saddle bags if harness was longer. 3 rd: Not much bass. All in all I have to give these speakers a 5 star review. Video is with volume only at 70%. I do have them on my bars and I do have a batwing which I’m sure helps with wind drowning. My speed got to about 60mph and they sound great. For the price, you cant go wrong!! 5 ⭐️

### ⭐⭐⭐⭐ Great system for the price
*by B***H on May 25, 2017*

I wasn't expecting a lot from these but they sound pretty good and they are loud. I stream Spotify radio through Bluetooth and the quality is pretty good. You have to check the settings on streaming apps to get the best sound. I haven't tried the mini audio connection but I should do that. A lot of people expect top notch sound with a Bluetooth connection but as any audiophile knows, you lose a LOT of quality via Bluetooth. You are always better off using a wired connection for higher volume and better quality without pops, clicks, and hisses from radio interference. Like most people have commented, they bass is not very deep but these things will suck the life right out of your battery as is. If you added a subwoofer or deeper bass you would probably suffer performance issues on your motorcycle. I HIGHLY recommend getting a trickle battery charger for your bike and leave it on the bike while its in the garage after using this system. Your bike cannot fully recharge your battery if you use this going down the highway for more than 30 minutes and you will find it takes longer to start your bike. I gave it a try after I installed it in my garage while the motor was not running and listed to some tunes while I tightened everything down and it completely drained my battery dead. I had to jump start it with my truck which is not really a good idea but I wanted to ride. My only real complaint is they don't provided a power switch. I bought a toggle switch at an auto parts store and installed it next to my seat. You DO NOT want to leave this connected to your battery even if you are not playing music or you will have no battery power left at all to start it. Don't follow the instructions to hack into your igntiton either. That is not a good idea with a motorcycle or any vehicle that doesn't have a hood on it to protect it from the elements. Just a little bit of water on any exposed wires could ruin your day in a split second.

## Frequently Bought Together

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-09-15*