Signature Series 3i 6.5-inch Coaxial Speakers
Best marine speakers for boaters seeking premium sound and customizable lighting.
Experience superior sound on the water with the Fusion (Garmin) Signature Series 3i 6.5-inch Coaxial Speakers. Engineered for the harsh marine environment, these speakers feature a high-gloss white finish and exceptional durability. Enjoy clear audio powered by 75W RMS, enhanced by a silk dome tweeter and a built-in passive crossover. The integrated CRGBW LED lighting system allows for customizable illumination, creating the perfect ambiance for any outing.
$429.99
Owner Satisfaction
4.7
/ 5
Category Rank
19
/ 495
#19 in Marine Speakers
Price vs Category Average
+41%
Above average
Speaker Type
2
/ -way coaxial
Who it's for
- Boat owners navigating harsh saltwater and sun-exposed environments
- Audiophiles needing clear sound over loud engine noise
- Boaters wanting customizable lighting for evening entertainment
Who should skip it
- Users wanting a simple, plug-and-play speaker installation
- DIY installers avoiding complex wiring and control modules
- Budget-conscious buyers seeking affordable audio upgrades
Performance breakdown
Marine Durability
IPX6 rating and corrosion-resistant hardware ensure longevity in harsh saltwater environments.
Audio Clarity
Silk dome tweeter delivers crisp, detailed highs even at higher volumes.
Power Handling
75W RMS provides robust, distortion-free sound for open-air marine settings.
Visual Customization
Integrated CRGBW lighting offers extensive color options for personalized deck ambiance.
Installation Ease
Flush mount design simplifies integration but requires precise depth clearance.
Frequency Range
Solid 70Hz floor provides balanced mid-range performance for most marine audio.
Key Specs
Speaker Type
2-way coaxial
Nominal Size
6.5 inches (165 mm)
Power Handling (RMS)
75 Watts
Peak Power
225 Watts
Impedance
4 Ohms
Frequency Response
70 Hz – 20,000 Hz
Sensitivity
90 dB (1W/1m)
Mounting Type
Flush Mount
Features
- Customizable CRGBW LED lighting
- Superior marine-grade durability
- UV-resistant construction
- Sleek flush mounting design
- Guaranteed saltwater safe operation
- High-quality silk dome tweeter
- IPX6 water resistance rating
- Includes protective grille and wiring
What customers say
Customers overwhelmingly praise the Fusion Signature Series 3i speakers for their exceptional sound clarity and robust performance on the water. The core focus is on acoustic quality, noting impressive mid-range definition and surprisingly deep bass, especially when amplified. Equally important is the superior build quality. The marine grade construction inspires high confidence in long term reliability against harsh elements like UV exposure and water. The integrated CRGB lighting is a significant aesthetic enhancement, adding vibrant ambiance. While the initial cost is substantial, reviewers agree the uncompromising performance and rugged design fully justify the premium investment, making these a top tier audio upgrade.
Know before you buy
Yes, these speakers are specifically engineered for marine use. They feature corrosion-resistant hardware and UV-resistant materials to ensure they withstand the harsh conditions of saltwater exposure.
To access the full range of colors and lighting effects, you will need a compatible CRGBW lighting controller. Without a controller, the LEDs may not function or will be limited to basic color settings.
You will need a mounting depth of at least 3.11 inches (79 mm). Be sure to check the clearance behind your chosen mounting surface to ensure there is enough room for the speaker assembly.
While these speakers can run off a standard marine head unit, they are rated for 75W RMS. Using an external amplifier will help you reach their full potential and ensure cleaner, more powerful audio at higher volumes.
The silk dome tweeter is designed to produce smoother, more detailed high-frequency sounds. It avoids the harshness often associated with metal tweeters, resulting in a more natural and balanced audio experience.
An IPX6 rating means the speakers are protected against powerful water jets from any direction. While they are highly water-resistant and built for the marine environment, they are not intended to be submerged underwater.
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$430