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Boss MC420B All-terrain Bluetooth® speaker pods and amplifier system (Chrome)

Item # 104MC420B

Do you have a motorcycle or an ATV without a way to hear your favorite tunes, or a boat that needs accompaniment?...

Do you have a motorcycle or an ATV without a way to hear your favorite tunes, or a boat that needs accompaniment?...

California customers:
Please click here for your Proposition 65 warning.

13 questions - 20 answers

Item # 104MC420B

Shop all BOSS Audio Bluetooth Amplified Speakers

About the Boss MC420B

Bob Bihlmayer

Take it outside

Do you have a motorcycle or an ATV without a way to hear your favorite tunes, or a boat that needs accompaniment? Do you want to stream music from your phone or other Bluetooth-equipped device? This MC420B speaker system from Boss can satisfy your needs. It's weatherproof: the MC420B's components, including the speakers, circuit boards, and amplifier connections, have been specially coated and sealed to protect against damage from water and weather. And it's Bluetooth enabled, so you can connect wirelessly to your favorite device for hours of listening pleasure.

Take it outside

Do you have a motorcycle or an ATV without a way to hear your favorite tunes, or a boat that needs accompaniment? Do you want to stream music from your phone or other Bluetooth-equipped device? This MC420B speaker system from Boss can satisfy your needs. It's weatherproof: the MC420B's components, including the speakers, circuit boards, and amplifier connections, have been specially coated and sealed to protect against damage from water and weather. And it's Bluetooth enabled, so you can connect wirelessly to your favorite device for hours of listening pleasure.

Get connected

The MC420B includes an in-line volume control for the two 3” speakers, which include adjustable brackets to mount the streamlined pods to a handlebar or rail. You can plug your media player into the system's minijack input or connect via Bluetooth2.1 — either way,  the system's 600 watts of power will rock the outdoors. And the system's Bluetooth reception range extends up to 33 feet, so you can keep the music playing even when you're not right next to the system. Wherever you go, the MC420B can handle the conditions and pump out the tunes.

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Product highlights:

  • system includes 2-channel amplifier and two 3" speakers
  • marine-grade construction for weather resistance
  • Bluetooth enabled with auto pairing and reconnect
  • aux input (minijack)
  • peak power output: 600 watts
  • frequency response: 80-15,000 Hz
  • chromed plastic speaker pods
  • multi-function wired remote control
  • includes adjustable mounting brackets
  • dimensions: 3-1/4"L x 3-1/8"W x 1-5/8"D
  • warranty: 3 years
  • MFR # MC420B

What's in the box:

  • 2 Speakers (each with 37" wire and mounting bracket attached)
  • 2-channel amp (with wiring attached)
  • Wired volume control (attached to amp with 76" cable)
  • Two 0.25" spacers
  • Two 0.195" spacers
  • Two 0.155" spacers
  • Two 0.122" spacers
  • Two 0.078" spacers
  • Two 0.040" spacers
  • Two M10x45mm bolts (installed)
  • Two M10 Split lock washers (installed)
  • Two M10 Flat washers (installed)
  • Two M10x30mm bolts
  • Two 5-amp ATO fuses (one installed/one spare)
  • Four 3/4" Self-tapping screws
  • 4 Small split lock washers
  • 4 Small flat washers
  • User manual
  • Warranty information
  • Boss Facebook note

Customer reviews for Boss MC420B

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More details on the Boss MC420B

Russ B.

Product Research

Features

Amplifier Inputs: The amp has four inputs; RCA jacks on the amp, a female 3.5mm mini-jack on the amp, a male 3.5mm mini-plug attached to the amp with a 6' cord, and wireless Bluetooth. All four are inputs are live simultaneously, so if more than one is connected, selection must be made by turning all but one source off.

Note: If more than one source connected to the line inputs (RCA and 3.5mm) is turned on, it's likely you'll hear static through the speakers in addition to music, even if the source is muted or paused.

Speaker Mounting: The speakers are designed to mount to a round tube using the adjustable stainless steel clamps. Six different spacer sizes are included for use with tubes from 5/8" to 1-1/2" (approximately). Once the speakers are in place, but before the brackets are tightened, you can adjust the mounting angle. After mounting, the speakers can still swivel almost 360°.

Wiring: All the wiring is fixed length and already attached to the speakers and amplifier. Each speaker has a 37" input wire attached and the wires from both speakers are attached to a single Molex plug. The power and ground wires extend 74" from that same Molex plug and power wire has a 5 amp in-line fuse. The 22" speaker output wires are attached to the amplifier and terminated with the mate to the speakers' Molex plug.

Volume: The rotary volume control has a 76" cable attached that plugs into the amp and mounts in a round hole in a panel, 0.27" diameter.

Dimensions:

  • Speakers:
    • Width: 4-1/8"
    • Height: 4-1/4"
    • Mounting Height: 5-1/2" (above center of the bar to which the speaker is mounted)
    • Depth: 4-3/4"
  • Amplifier:
    • Width: 2-5/8" (3-1/8" including mounting flange)
    • Height: 1-5/8"
    • Length: 3-5/8" (4-5/8" including wiring)

Specifications:

  • Voltage: 10-16 volts DC
  • Power Rating: 120 watts (RMS) / 600 watts (Peak)
  • THD: <0.1%
  • Signal to Noise Ratio: >85 dB
  • Channel Separation: >50 dB
  • Frequency Response: 80 Hz - 15 kHz
  • Sensitivity: 150 mV - 1 V

Extended Warranty: Units purchased from Crutchfield after 3/1/2015 carry an extended warranty relative to purchases from Boss' standard dealer network. The new warranty is 3 years parts and labor.

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Customer Q&A

13 questions already asked

Q
Can I answer a phone call through my speaker ?
donald  Jan 23, 2023
1 answer
A
Greetings Donald, and thank you for your question. The Bluetooth in the Boss MC420B is for music streaming only. It does not support hands free calling.
hogan  Jan 23, 2023 (Staff)
Q
How can I get a new wiring harness for my speakers mine got damaged?
joey  Apr 28, 2022
1 answer
A
We at Crutchfield do not have the harness available separately. I would recommend contacting Boss Audio directly. Their customer service number is 800-999-1236. Hope this helps.
kenneth  Apr 28, 2022 (Staff)
Q
What is the weight of one speaker?
nelson r  Mar 11, 2022
1 answer
A
Light maybe a pound. These speakers are unbelievable for the money I highly recommend them
joshua  Mar 14, 2022
Q
Can I purchase a new amplifier for the 420 system?
steven  Jun 13, 2021
1 answer
A
We do not offer the amp by itself and recommend contacting Boss' support by calling 800-999-1236 to check if it can be purchased as a replacement item
jason  Jul 31, 2021 (Staff)
Q
Can I hook up my stock speakers to this system?
totter  Oct 31, 2020
2 answers
A
Stock speakers are not usually rated to work with aftermarket amps. We do not recommend connecting them to the amp in this system.
jason  Dec 02, 2020 (Staff)
A
I would think it would depend on the speaker output but do not foresee any issues.
robert  Nov 30, 2020
Q
Will the clamps fit on the larger 1-1/4" handlebars?
wade  Aug 08, 2019
1 answer
A
Yes. I was able to fit them on my 1-1/4 handlebars. You may need an extra set of hands (I did) because the clamps are quit rigid (took two hands to squeeze the clamp together).
michael  Aug 08, 2019
Q
Can these be used with a "in-dash" receiver?
leeroy  Jun 12, 2019
1 answer
A
Thank you for your question, LeeRoy. You can hook the Boss MC420B to your head unit by using the pre-amp outputs on your stereo. You will need to leave the speaker system in Aux mode, so you can use your stereo's Bluetooth connection to stream your audio content. For further info reach out to an Advisor. You can chat with us online, or give us a call at 1-800-324-9695.
jessica  Jun 20, 2019 (Staff)
Q
Does the MC420B amplifier have a power switch to turn off so it does not drain the battery?
bill  Mar 12, 2019
3 answers
A
Negative. I used one of those fuses with the wire soldered on it and plugged my power wire into that wire. I used that fuse in place of my accessory fuse. So turned on and off with the key. Hope that helps Enter
shane  Mar 13, 2019
A
No, you will need to install a 2.00 relay.. However, you can install a toggle switch and manually switch on/ off also.
thurman  Mar 12, 2019
A
No wired directly to fuse box ignition
michael  Mar 12, 2019
Q
HOW DOES IT POWER OFF....WHEN BIKE IS OFF?
bob  Dec 25, 2017
3 answers
A
Splice the power wire to an ignition wire so it turns on and off with the key. Test the wires with a volt meter
joshua  Mar 14, 2022
A
I found a YouTube video on the installation and it went exactly as show. I AM able to shut off the speakers and amp when I turn off the bike (2008 HD Road King Classic).
michael  Aug 08, 2019
A
Connect the primary 12volt power wire (Red) to a switched output in the fuse panel to ensure the system does not draw any power when the bike is off.
ryan  Jan 01, 2018 (Staff)
Q
Is the amp water proof?
donald  Jul 03, 2014
2 answers
A
I don't ride in the rain unless caught in it by surprise. That said, one season in and no issues. I mounted mine vertically, best place I could find, and covered the unused output jacks. System lacks bass but not bad for the price and I can definitely hear it at highway speeds.
robert  Nov 30, 2020
A
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.
greg  Jul 03, 2014 (Staff)
Q
Could I wire this to a marine subwoofer and amplifier without having to buy a head unit/stereo? Basically could I get to wear the speakers and amp in this system and the sub and amp all play together from the Bluetooth device?
harrison  Jun 29, 2014
1 answer
A
I forwarded your question to an Advisor and they responded with the following: The Boss MC420B is a stand alone system and can't be wired to any other speaker or amps. If you are looking to do multiple speakers and amps that will be best served using a receiver as well. Sorry we didn't have better news on that. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.
kristina  Jun 30, 2014 (Staff)
Q
Can you wire these speakers to a head unit/stereo and sub or is it just for Bluetooth use?
harrison  Jun 29, 2014
2 answers
A
It can be wired to any audio source using the rca outputs on the amp. I didn't use the Bluetooth feature. Had a stereo 3.5mm to dual rca and plug into my cell phone.
eliezer  Jun 29, 2014
A
Use the mini cable from the amp to plug into your Stereo unit U can use either Bluetooth or hard cable by mini in or out amplification Hope that helps
reid c  Jun 29, 2014
Q
How are these speakers powered? Do the have to connect to the battery?
alan  May 13, 2014
1 answer
A
I forwarded your question to an Advisor and they responded with the following: It appears there is an amplifier that comes with the speakers and in that case it would require power from the battery. The problem is the information is still preliminary so I cannot confirm that is the case. It does mention this which hints the amplifier connection to the battery: This MC420B speaker system from Boss can satisfy your needs. It's weatherproof: the MC420B's components, including the speakers, circuit boards, and amplifier connections, have been specially coated and sealed to protect against damage from water and weather. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.
kristina  May 16, 2014 (Staff)
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