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BOSS Audio Systems

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

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Availability: In Stock.
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Arrives Monday, Feb 16
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Style: (2) 3" Black Speakers + Class D Amp


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

Brand: BOSS Audio Systems


Speaker Maximum Output Power: 600 Watts


Frequency Response: 15 KHz


Connectivity Technology: wired, wireless


Audio Output Mode: Stereo


Input Voltage: 12 Volts


Mounting Type: Handlebar Mount


Material: Plastic


Model Name: MCBK420B


Speaker Type: Outdoor


Special Feature: Amplified, Built-in Bluetooth, Weatherproof


Recommended Uses For Product: For Music Players


Compatible Devices: MP3 Player, Smartphone


Unit Count: 1 Count


Surround Sound Channel Configuration: 3.0


Color: Black


Included Components: Amplifier


Product Dimensions: 4.5"D x 4"W x 4"H


Item Weight: 3.8 Pounds


Impedance: 4 Ohms


Is Waterproof: False


Warranty Type: Extended


Maximum Range: 30 Feet


Number of Items: 3


Control Method: Remote


Wireless Communication Technology: Bluetooth


Speaker Size: 3 Inches


Power Source: Corded Electric


Woofer Diameter: 3 Inches


Tweeter Diameter: 1 Inches


Water Resistance Level: Water Resistant


Customer Package Type: Standard Packaging


Number of Batteries: 1 12V batteries required.


Audio Driver Type: Dynamic Driver


Bluetooth Range: 30 Feet


Subwoofer Connectivity Technology: Wired


Specific Uses For Product: Pro Audio


UPC: 791489123082


Style: (2) 3" Black Speakers + Class D Amp


Indoor/Outdoor Usage: Outdoor


Global Trade Identification Number: 82


Manufacturer: BOSS Audio Systems


Item Weight: 3.8 pounds


Item model number: MCBK420B


Batteries: 1 12V batteries required.


Is Discontinued By Manufacturer: No


Date First Available: February 10, 2015


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Feb 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • 2008 Harley Davidson Sportster 1200 Install!
Style: (2) 3" Chrome Speakers + Class D Amp
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! ... show more
Reviewed in the United States on April 7, 2019 by Door Man
    • Worth every penny
Style: (2) 3" Chrome Speakers + Class D Amp
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! ... show more
Reviewed in the United States on January 1, 2026 by leon payne
    • Happy buyer
Style: (2) 3" Black Speakers + Class D Amp
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
Reviewed in the United States on October 2, 2025 by Kavin Mitchell
    • Easy Install, Good Sound, No Battery Drain
Style: (2) 3" Black Speakers + Class D Amp
The media could not be loaded. Installed on a Can-Am Ryker (stock exhaust) BOSS Audio Systems MCBK420B Bluetooth Speaker System Overall, this is a solid little setup—especially for the price! Installation was super easy. I wired it directly to the battery, and despite what some reviews say, I haven’t had any battery drain issues. The volume knob doubles as the on/off switch—just remember to turn it off when you’re done, and you’re good to go. I’ve tested it like this for several days with no problems. As for sound: you definitely get clear highs and mids, but don’t expect any bass—this is a budget-friendly system after all. Still, it’s way better than riding in silence. I can hear my music clearly at around 40 MPH. And when you’re stopped? It’s almost too loud—my ears were ringing a bit from the volume, haha! ... show more
Reviewed in the United States on July 1, 2025 by Jay
    • Highly recommend, great purchase
Style: (2) 3" Black Speakers + Class D Amp
So far these have turned out to be a great purchase. Instructions give a very clear guide on installation. Everything being labeled makes it super simple to understand. Connecting to the system is very easy. Speakers are clear and sound great even at highway speeds. Although there is almost no bass, so upbeat songs don’t exactly sound the same. The only minor cons that I could think of so far is that the instructions don’t tell you that you will have to have some kind of wire connector to connect them to your power/ground source. So if you don’t have any, be prepared to make a run for them. The other thing is the rubber pieces that come with this are either really thin or really thick, there is no in between. I had to use the thick ones and a locking plier to get the bottom nut onto the threads and it proved to be slightly challenging. ... show more
Reviewed in the United States on July 14, 2025 by Curtis L Emery

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