• Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
  • Suncoast Marine and Auto offers Fusion Marine Compact Box Speakers (Pair) (MS-OS420)
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Fusion Marine Compact Box Speakers (Pair) (MS-OS420)

Fusion Marine Compact Box Speakers (Pair) (MS-OS420)

$50.99
$79.99 $50.99
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Product Description

4" Compact Marine Box Speakers (MS-OS420)

Bring crisp, reliable sound to your boat, dock, or outdoor entertainment space with the Fusion 4" Compact Marine Box Speakers (Pair) – model MS-OS420. Designed for marine and outdoor use, these speakers are engineered for durability, weather resistance, and excellent audio performance in harsh environments.

Key Features & Capabilities

  • Peak / RMS Power Handling: Handles up to 100 W peak power and 25 W RMS, giving you plenty of volume headroom for open-air environments. 
  • Frequency Response & Sensitivity: Delivers a frequency range of 80 Hz to 20 kHz with a sensitivity of 86 dB (1W / 1m)—clear highs, solid midrange, and sufficient low-end extension for compact speakers. 4-Ohm Impedance
    Designed for 4 Ω amplifier output compatibility, making them easy to integrate with most marine or outdoor stereo systems. 
  • Rugged Construction: Built with a polypropylene woofer and NBR surround—resistant to salt, spray, and UV exposure.
  • Sealed Box Design with Adjustable Bracket: Supplied in a sealed enclosure for clean, full-range sound—with a mounting bracket included for flexible installation on boat towers, rails, bulkheads, or walls.
  • All-Weather Durability: Designed for outdoor/marine environments, these speakers are UV-stable and built to withstand exposure to moisture, salt, and harsh climate conditions. 
  • Compact Size with Big Sound: The 4" driver size and compact enclosure make these speakers ideal when flush mounting isn’t possible, while still providing a robust audio experience. 

Why Choose Fusion MS-OS420?

  • Perfect for boat towers, docks, patios, or outdoor entertainment areas
  • Designed to work seamlessly with Fusion marine stereo systems or any 4 Ω amplifier
  • Delivers high-quality sound without compromising on corrosion resistance or weather durability
  • Easy to mount in tight spaces thanks to the included adjustable bracket

Specifications:

  • Cone Material: Polypropylene/NBR Surround
  • Efficiency (1W/1M): 86dB W/M
  • Frequency Response: 80Hz - 20Hz
  • Impedance: 4 Ohm
  • Peak Power: 100W
  • RMS Power: 25W
  • Woofer Size: 4"
  • Tweeter Type: PEI Cone

Details:

  • Watts Max: 100w
  • Mounting Style: Bracket
  • QTY: Pair
  • Size: 4"
  • Cutout Size: N/A

What's in the box:

  • Two 2-way white marine/outdoor speakers
  • 2 Mounting brackets
  • 4 Bracket knobs
  • Replacement grille putty
  • Two 20' Lengths of speaker wire (tinned bare wire on both ends)
  • Four 1-1/8" Stainless steel screws
  • Installation manual
  • Warranty information
  • Warranty: 1 year


Owner's Manual (pdf)

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.