Why would you recommend, this set of 4 or the set of 2 with 600 watts ?

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.

Will these fit a 300cc touring scooter?

The MCBK420B may fit. Thank you.

Will this work with a Honda Rebel 250?

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.

Where do I find a replacement fuse?

Available at local auto parts or Walmart automotive department

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BOSS Audio Systems MCBK420B Bluetooth Speaker System - Class D Compact Amplifier, 3 Inch Weatherproof Speakers, Volume Control, Great for Use with ATVs/Motorcycles, 12 Volt Vehicles

BOSS Audio Systems MCBK420B Bluetooth Speaker System - Class D Compact Amplifier, 3 Inch Weatherproof Speakers, Volume Control, Great for Use with ATVs/Motorcycles, 12 Volt Vehicles

4.3/5

Product ID: 17482917

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Details

Brand
BOSS Audio
Speaker Maximum Output Power
600 Watts
Connectivity Technology
wired wireless
Audio Output Mode
Stereo
Input Voltage
12 Volts

📡Bluetooth wireless connectivity

🔊3-inch full-range speakers

🌧️Weatherproof design

Description

🏍️ Turn every ride into a concert—boss your sound, rain or shine!

COMPACT POWERHOUSE - Class D amplifier delivers crisp, powerful audio in a sleek, space-saving design perfect for your ATV or motorcycle.
RIDE THE SOUNDWAVE - Seamlessly stream your favorite playlists via Bluetooth with a 10-meter wireless range—cut the cords, not the vibe.
CUSTOM VOLUME CONTROL - Inline volume knob lets you fine-tune your soundtrack on the fly without fumbling through your device.
BUILT FOR THE ELEMENTS - Advanced weatherproofing means your music stays loud and clear rain or shine—never miss a beat on the road.
PLUG PLAY VERSATILITY - 3.5mm auxiliary input ensures compatibility with all your devices—MP3 players, smartphones, and more.

The BOSS Audio Systems MCBK420B is a rugged, weatherproof Bluetooth speaker system designed for 12V vehicles like motorcycles and ATVs. Featuring two 3-inch full-range speakers paired with a compact Class D amplifier, it offers wireless streaming with a 10-meter Bluetooth range and an inline volume control for easy adjustments. Its durable build and adjustable mounting brackets fit handlebars from 0.75” to 1.25”, making it the ultimate audio upgrade for outdoor enthusiasts seeking powerful sound on the go.

Specifications

Material	unspecified
Model Name	MCBK420B
Speaker Type	Tweeter
Special Feature	Waterproof
Recommended Uses For Product	For Motorcycles
Compatible Devices	MP3 Player, Smartphone
Subwoofer Diameter	3 Inches
Surround Sound Channel Configuration	3.0
Color	Black
Included Components	BOSS Audio Systems MCBK420B
Product Dimensions	3"D x 3.5"W x 1.5"H
Item Weight	2 Kilograms
Impedance	4 Ohm
Is Waterproof	FALSE
Warranty Type	Extended
Number of Items	2
Control Method	Remote
Wireless Communication Technology	Bluetooth
Speaker Size	3 Inches
Power Source	AC
Woofer Diameter	3 Inches
Tweeter Diameter	3 Inches
Vehicle Service Type	Motorcycle
Water Resistance Level	Waterproof
Number of Batteries	1 12V batteries required.
Audio Driver Type	Dynamic Driver
Bluetooth Range	10 Meters
Connectivity Protocol	Bluetooth
Includes MP3 player?	No
Specific Uses For Product	personal
UPC	791489123082
Style	(2) 3" Black Speakers + Class D Amp
Customer Package Type	Standard Packaging
Maximum Range	21 Meters
Input Voltage	12 Volts
Global Trade Identification Number	00791489123082
Controller Type	Remote Control
Manufacturer	Boss Audio Systems, Inc.
Item Weight	4.4 pounds
Item model number	MCBK420B
Batteries	1 12V batteries required.
Is Discontinued By Manufacturer	No
Wireless Remote	No
Warranty	3 YEAR PLATINUM DEALER WARRANTY
Weight	4.68 Pounds

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BOSS Audio Systems MCBK420B Bluetooth Speaker System - Class D Compact Amplifier, 3 Inch Weatherproof Speakers, Volume Control, Great for Use with ATVs/Motorcycles, 12 Volt Vehicles

Details

Description

Specifications

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