Contact us
Close contact box

Fusion MS-FR4021

4" 2-way marine speakers

Item # 917FR4021

Fusion's MS-FR4021 4" marine speakers pack a lot of tech into a compact design.

Fusion's MS-FR4021 4" marine speakers pack a lot of tech into a compact design.

Need help?
Contact our Virginia-based experts.

Item # 917FR4021

Ships free

In stock

$89.99 -$10.00 Price break

$79.99 pair
Add to wishlist

About the Fusion MS-FR4021

Small speakers, big sound

Fusion's MS-FR4021 4" marine speakers pack a lot of tech into a compact design. The heat-pressed poly cones feature German "CURV" technology, which uses a woven fiber composite that's heat-pressed to form a lighter, stronger cone. When combined with titanium dome tweeters, the result is a high-performance 4" speaker that sounds great and is built to last.

Small speakers, big sound

Fusion's MS-FR4021 4" marine speakers pack a lot of tech into a compact design. The heat-pressed poly cones feature German "CURV" technology, which uses a woven fiber composite that's heat-pressed to form a lighter, stronger cone. When combined with titanium dome tweeters, the result is a high-performance 4" speaker that sounds great and is built to last.

Technology and value

A boat is a rough place for speakers. Heat, humidity, salt, spray, and high-pressure hose-downs at the dock can shorten the life of any speaker that's not built for life on the water. These marine speakers meet the toughest standards for UV stability and salt/fog resistance. Rigorous testing ensures that they're ready to rock, even in the extremes of a marine environment.

Three-year warranty

The water-resistant design complies with ASTM standards for UV stability and salt/fog resistance, so your MS-FR4021 speakers will perform at their peak even after prolonged exposure to the elements. As part of Fusion's True Marine™ line, they're even backed by a 3-year warranty.

READ LESS

Product highlights:

  • 4" 2-way marine speakers (pair)
  • sealed, water-resistant construction
  • heat-pressed poly cones using German CURV technology
  • titanium dome tweeter
  • UV-resistant white grilles
  • meets IP65 water and dust resistant standards
  • complies with ASTM standards for UV stability (ASTM-D4329) and salt/fog resistance (ASTM-B117)
  • high-efficiency design reduces battery drain
  • engineered to minimize magnetic interference to navigational equipment
  • power handling: 25 watts RMS (120 watts peak)
  • frequency response: 90-22,000 Hz
  • sensitivity: 87 dB
  • warranty: 3 years
  • Our 60-day money-back guarantee
  • MFR # MS-FR4021

What's in the box:

  • Two 2-way Marine speakers
  • 2 Grilles
  • 2 Foam gaskets
  • Two 14-3/4' Lengths of speaker wire (each has female quick-slides on one end and bare wire on the other)
  • Eight 1-1/8" Stainless steel screws
  • Installation manual
  • Warranty information
  • Template

Customer reviews

Loading reviews...

Fusion MS-FR4021 reviews

Average review:

5 reviews

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Fusion MS-FR4021

Crutchfield customer from Ludlow, MA on 9/1/2019

Verified customer (What's this?)
Verified employee purchase (What's this?)

Easy installation- great sound

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

small wonders

Crutchfield customer from Houston, TX on 7/13/2019

Verified customer (What's this?)
Verified employee purchase (What's this?)

excellent speakers, well-made and deliver a sound punch well beyond their size limit!

Pros: performance

Cons: none

Crutchfield response on

0 of 0 found this helpful

Great bang for you Buck!

Andrew from USVI on 6/10/2016

Verified customer (What's this?)
Verified employee purchase (What's this?)

Great speakers! Good quality and very durable. They Handel high UV and salt water great! They Handel over powering well and kick out a lot of sound for small speakers

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Fusion MS-FR4021

Crutchfield customer from US VI on 6/10/2016

Verified customer (What's this?)
Verified employee purchase (What's this?)

Great pair of small speakers! Very durable and Handel overpowering well. They have an impressive high sound and base output for there size! Easily the best 4 inch speakers I've had in my boat. They Handel the high UV and salt water sprays and soakes like nothing.

Pros: Very durable, great sound output, can handle overpowering, doesn't corrode or rot in intense sun and sea water conditions.

Cons:

Crutchfield response on

1 of 1 found this helpful

Great speakers

Rick D. from Chattanooga TN on 5/13/2016

Verified customer (What's this?)
Verified employee purchase (What's this?)

These are great speakers for the money. Was looking for rugged waterproof speakers for the Jeep and these are a good value.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Verified customer (What's this?)
Verified employee purchase (What's this?)

Pros:

Cons:

Crutchfield response

<< >>

More details on the Fusion MS-FR4021

Product Research

Features

True Marine: Fusion describes these speakers as True Marine Accredited, meaning they are designed specifically for the marine environment and backed by Fusion's 3 year warranty. The speakers are tested to ensure they meet or surpass IP65 (waterproof and dustproof), ASTM-D4329 (UV stability), and ASTM-B117 (salt/fog resistance) standards. The tweeter housing, crossover, and magnet are all sealed.

Curv Woofer Cone: CURV technology incorporates a polypropylene/woven fiber composite, heat pressed to form a lighter and stronger cone. This improves sound definition and increases output, along with creating better resistance to the marine environment.

Size: The MS-FR4021s fit into standard 4" openings (standard car speaker size), but the frame is bigger than a typical 4" car speaker.

Magnetic Shielding: Magnetic interference is something to take into consideration when installing marine electronics. Fusion added a bucking magnet at the rear of the speaker motor assembly to reduce interference that can occur with compasses or compass-based electronics.

Stainless Steel Hardware: The provided mounting screws are stainless steel.

Enclosure: Enclosure recommendations are given in the installation manual (an enclosure is not necessary, the speakers will operate in free-air):

  • Sealed: 0.07 ft³
  • Ported: 0.34 ft³ (with a 2" diameter 3-7/16" long port tube)

Loading accessories...

Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
size [ JEFFREY C  May 31, 2017 ]

1 question already asked

Q
What watts will these speakers handle?
[ Randy  May 16, 2018 ]
1 answer
A
They can handle up to 25 watts RMS and up to 120 watts peak power. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=101
[ Paul  May 28, 2018 ]  Staff

Loading articles...

Compare all details
TOP