---
product_id: 17482917
title: "BOSS Audio Systems MCBK420B 3 Inch Motorcycle Speakers and 2 Channel Amplifier Package - Bluetooth, Weatherproof, Volume Control, ATV UTV Compatible"
brand: "boss audio systems"
price: "R$1771"
currency: BRL
in_stock: true
reviews_count: 11
category: "Boss Audio Systems"
url: https://www.desertcart.com.br/products/17482917-boss-audio-systems-mcbk420b-3-inch-motorcycle-speakers-and-2
store_origin: BR
region: Brazil
---

# Bluetooth wireless streaming 3-inch full-range speakers Weatherproof design BOSS Audio Systems MCBK420B 3 Inch Motorcycle Speakers and 2 Channel Amplifier Package - Bluetooth, Weatherproof, Volume Control, ATV UTV Compatible

**Brand:** boss audio systems
**Price:** R$1771
**Availability:** ✅ In Stock

## Summary

> 🏍️ Turn your ride into a rolling concert—because silence is overrated!

## Quick Answers

- **What is this?** BOSS Audio Systems MCBK420B 3 Inch Motorcycle Speakers and 2 Channel Amplifier Package - Bluetooth, Weatherproof, Volume Control, ATV UTV Compatible by boss audio systems
- **How much does it cost?** R$1771 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/17482917-boss-audio-systems-mcbk420b-3-inch-motorcycle-speakers-and-2)

## 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

- • **Ride with Rich Sound:** Powerful 3-inch speakers deliver clear, full-range audio that cuts through road noise.
- • **Plug & Play Versatility:** Compatible with smartphones, MP3 players, and ATV/UTV models for ultimate audio freedom.
- • **Seamless Wireless Control:** Bluetooth connectivity lets you stream your favorite playlists from up to 30 feet away.
- • **Built to Brave the Elements:** Advanced weatherproofing ensures your music stays loud rain or shine.
- • **Custom Volume at Your Fingertips:** Inline volume control mounts conveniently on your handlebar for quick, safe adjustments.

## Overview

The BOSS Audio Systems MCBK420B package includes two 3-inch weatherproof motorcycle speakers and a compact 2-channel Class D amplifier with Bluetooth connectivity. Designed for handlebar mounting, it supports wireless streaming from smartphones and MP3 devices, features inline volume control, and is compatible with ATVs and UTVs. Backed by a 3-year warranty, this system delivers robust sound performance tailored for outdoor riding conditions.

## Description

desertcart.com: BOSS Audio Systems MCBK420B 3 Inch Motorcycle Speakers and 2 Channel Amplifier Package - Bluetooth, Weatherproof, Volume Control, ATV UTV Compatible : Electronics

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: Worth every penny - I don’t do reviews but I had to express my gratitude for these speakers! After hearing reviews and carefully weighing my options for pricing and quality, I can say that these speakers are well worth the value! I have a 750 original pipes and a 800cc and these speakers are heard BEYOND expectations on both motorcycles!! It makes the ride so much more enjoyable! They have been in the rain and still work as new! Definitely recommend for motorcycle riding and enjoyable experience!

## 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
- Weatherproof - The MCBK420B has been outfitted with the latest weatherproofing techniques for protection against the elements
- Speakers - Also included are two 3-inch matte black full range speakers. The adjustable brackets will fit handlebars from ranging from .75” to 1.25”
- Playback - A 3.5 mm auxiliary input 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 | B00T3QBL3M |
| Audio Driver Type | Dynamic Driver |
| Batteries | 1 12V batteries required. |
| Best Sellers Rank | #4 in Powersports Speaker Systems |
| Bluetooth Range | 30 Feet |
| Color | Black |
| Compatible Devices | MP3 Player, Smartphone |
| Control Method | Remote |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.3 4.3 out of 5 stars (7,004) |
| Date First Available | February 10, 2015 |
| Global Trade Identification Number | 00791489123082 |
| Impedance | 4 Ohms |
| Included Components | Amplifier |
| Indoor/Outdoor Usage | Outdoor |
| Input Voltage | 12 Volts |
| Is Discontinued By Manufacturer | No |
| Is Waterproof | False |
| Item Weight | 3.8 pounds |
| Item model number | MCBK420B |
| Manufacturer | BOSS Audio Systems |
| Material | Plastic |
| Maximum Range | 30 Feet |
| Model Name | MCBK420B |
| Mounting Type | Handlebar Mount |
| Number of Batteries | 1 12V batteries required. |
| Number of Items | 3 |
| Power Source | Corded Electric |
| Product Dimensions | 4.5"D x 4"W x 4"H |
| Recommended Uses For Product | For Music Players |
| Speaker Size | 3 Inches |
| Speaker Type | Outdoor |
| Special Feature | Amplified, Built-in Bluetooth, Weatherproof |
| Specific Uses For Product | Pro Audio |
| Style | (2) 3" Black Speakers + Class D Amp |
| Subwoofer Connectivity Technology | Wired |
| Surround Sound Channel Configuration | 3.0 |
| Tweeter Diameter | 1 Inches |
| UPC | 791489123082 |
| Unit Count | 1 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:** wired, wireless
- **Frequency Response:** 15 KHz
- **Speaker Maximum Output Power:** 600 Watts

## Images

![BOSS Audio Systems MCBK420B 3 Inch Motorcycle Speakers and 2 Channel Amplifier Package - Bluetooth, Weatherproof, Volume Control, ATV UTV Compatible - Image 1](https://m.media-amazon.com/images/I/7198WKY5rML.jpg)

## Questions & Answers

**Q: Why would you recommend, this set of 4 or the set of 2 with 600 watts ?**
A: I tried running 4 in the amp provided by boss but it didn't have the power needed to dedicate for clear and loud sound. I went back down to two of these and 2 6/9s in my fairing in a separate amp. I would not recommend more then 2, but with just the 2 it was a decent sound I was pleased with it.

**Q: Will these fit a 300cc touring scooter?**
A: The MCBK420B may fit. Thank you.

**Q: Will this work with a Honda Rebel 250?**
A: I see no reason why they won't fit your Honda Rebel.If you put it up on utube to see the fitting instructions, you can decide if you want to go ahead with the fitting.You won't be disappointed with the great sound.

**Q: Where do I find a replacement fuse?**
A: Available at local auto parts or Walmart automotive department

## 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!

### ⭐⭐⭐⭐⭐ Worth every penny
*by L***E on January 1, 2026*

I don’t do reviews but I had to express my gratitude for these speakers! After hearing reviews and carefully weighing my options for pricing and quality, I can say that these speakers are well worth the value! I have a 750 original pipes and a 800cc and these speakers are heard BEYOND expectations on both motorcycles!! It makes the ride so much more enjoyable! They have been in the rain and still work as new! Definitely recommend for motorcycle riding and enjoyable experience!

### ⭐⭐⭐⭐ Happy buyer
*by K***L on October 2, 2025*

Initial installation was smooth and easy! Sounds good the only downfall is that it can’t be tuned and distorts if you go past half way, still gave it 4 stars because it does sound good and clear blutooth connects smoothly! Great quality! Would buy again

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---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-01-25*