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Fusion MS-OS420 4" 100W Marine Box Speakers

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  • Fusion MS-OS420 4" 100W Marine Box Speakers
  • Fusion MS-OS420 4" 100W Marine Box Speakers
  • Fusion MS-OS420 4" 100W Marine Box Speakers

List Price: $119.95 On Sale: $108.85 (GST Included) (You save 9.25%)


Expected Soon

$9.95 Flat Rate Generally ships out in 24 to 48 hours.


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The following accessories can be bundled with your purchase by checking the green ‘Include with Product’ button. You can add as many items to your order as you require and then simply ‘Add to Cart’ to complete order.

Product Info

Product Info

Check out the Fusion MS-OS420 4" 100W Box Speakers' Key Features
(Fusion MSOS420)

  • Genuine Australian Fusion Audio Warranty
  • Peace of Mind Purchase Guarantee (bottom of page)
  • A pair of 4" Marine Box Speakers
  • Suitable for marine and outdoor use
  • 100W Peak Power
  • 25W RMS Power
  • Adjustable Mounting Bracket Included


Great for on your boat or outside your home, the Fusion MS-OS420 2-Way 100W Box Speakers are carefully designed and manufactured specifically for marine and outdoor use.

Featuring an adjustable mounting bracket with all mounting hardware supplied, these speakers can be easily mounted anywhere. They are perfect for installation on an alloy vessel where flush mount speakers are not always practical.

The solid construction and powerful sound, combined with competitive pricing, make the MS-OS420 speakers a great value-for-money option.


Versatile Speaker Solution
Perfect for boats that do not have space for speaker cut outs, simply mount the speakers anywhere for quick and easy installation.

Engineered for the Marine Environment
The versatile Fusion MS-OS420 speakers have been designed specifically for use outdoors and in a marine environment.

All Mounting Hardware Included
The Fusion MS-OS420 speakers are supplied with an adjustable mounting bracket and the hardware required for installation.

Fusion Entertainment Ltd

Fusion Entertainment was established in New Zealand in 1998 by founders who have a passion for cars, music and street culture. Now, nearly 20 years later, the company's innovation and product design has propelled them to be a global player in car and marine audio. We trust in Fusion to bring a first class audio experience to your boat and car - and so can you!

Peace of Mind Purchase Guarantee
This product is supplied via Fusion Australia and enjoys the FULL benefits of the 'Genuine Fusion Australian Warranty'. (You may also be entitled to other consumer warranties as provided by the Australian Consumer Guarantee and these entitlements are not limited by this warranty). In the event that this product should fail please contact our service department or you can speak with Fusion Australia directly.

We are a FULLY AUTHORISED Australian retailer for Fusion Australia.

Due to differing operating costs associated with selling products via different marketplaces such as eBay, Amazon or our Online Store, our pricing may vary as a result.

Tech Specs

Technical Specifications

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

What's Included?

  • 1 pair of Fusion MS-OS420 4" 100W Marine Box Speakers
  • Adjustable mounting brackets

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