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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Description

🎵 Elevate your ride with unstoppable sound and wireless freedom!

POWERFUL 600 W AMPLIFICATION - Unleash booming sound that dominates any terrain.
SEAMLESS BLUETOOTH STREAMING - Wirelessly connect and vibe with Spotify, Pandora, and more.
VERSATILE CONNECTIVITY OPTIONS - RCA and 3.5mm aux inputs keep all your devices plugged in.
ALL TERRAIN WEATHERPROOF DESIGN - Built to brave rain, dust, and rugged outdoor adventures.
HANDLEBAR MOUNTING BRACKETS INCLUDED - Effortlessly attach to 0.75"–1.25" bars for on-the-go sound.

The Boss Audio Systems MCBK420B is a rugged, Bluetooth-enabled 600 Watt all-terrain speaker and amplifier set designed for outdoor and vehicle use. Featuring weatherproof 3" full-range speakers, remote volume control, and versatile inputs including RCA and 3.5mm aux, it delivers crystal-clear sound with a frequency response of 80Hz to 15KHz. Adjustable mounting brackets fit standard handlebars, making it perfect for motorcycles, ATVs, and other outdoor vehicles.

Specifications

Model Name	MCBK420B
Special Feature	Bluetooth
Recommended Uses For Product	For Smartphones or Tablets
Compatible Devices	MP3 Player, Smartphone, Tablet
Controller Type	Remote Control
Surround Sound Channel Configuration	5 1
Colour	black
Age Range (Description)	Adult
Item Weight	3.8 Pounds
Is Waterproof	TRUE
Maximum Range	30 Feet
Control Method	Remote
Wireless Communication Technology	Bluetooth
Speaker Size	3 Inches
Power Source	Corded Electric
Tweeter Diameter	1 Inches
Number of Batteries	1 12V batteries required.
Connectivity Protocol	Bluetooth
Includes MP3 player?	No
Manufacturer	BOSS AUDIO SYSTEMS
Model	MCBK420B
Model Year	2015
Product Dimensions	8.89 x 7.62 x 3.81 cm; 1.72 kg
Batteries	1 12V batteries required.
Item model number	MCBK420B
Hardware Interface	Bluetooth
Special Features	Bluetooth
Audio input compatible with the item	Auxiliary
Noise Level	85 dB
Speaker connectivity	RCA
Audio Wattage	600 Watts
Voltage	12 Volts
Wattage	600 Watts
Batteries Included	No
Batteries Required	No
Wireless Type	Bluetooth
Speaker Output Channel Quantity	2
Does it contain liquid?	No
Includes Rechargeable Battery	No
Includes remote	No
Manufacturer	BOSS AUDIO SYSTEMS
Country of Origin	USA
Item Weight	1 kg 720 g

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