Fusion Signature 7.7″ Marine Speakers


Made for life on the water, just like you. Bring on the elements. The Signature Series 3i coaxial speakers deliver crystal clear audio and withstand the conditions like never before.

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New, water-resistant connectors now come standard. This makes installation easy and provides superior protection from the harsh marine environment.


Material enhancements and protective engineering maintain the sharp aesthetic appeal of your speakers, year after year.


Any product that bears the Fusion True-Marine seal of assurance has been designed by Fusion to withstand the harshest marine environments season after season and comes with an industry-leading 3-year warranty.


A lighter and stronger woven fibre composite produces greater sound definition at a higher volume.


These speakers are designed to work optimally with Fusion® stereo systems and amplifiers (sold separately) with custom DSP profiles. This requires the Fusion-Link™ smart-device app for setup.


The classically styled perforated metal grille is available in 6.5″, 7.7″ and 8.8″ sizes.


Physical dimensions (Diameter x Depth) 8.66″ x 4.31″ (220 x 109.5 mm)
Weight (single unit) 4lbs (1.8 kg)
Water and dust rating IP65
Configuration Coaxial
Peak power (Watts) 280 W
RMS power (Watts) 100 W
Sensitivity (1 W / 1 m) 91 dB
Frequency response 60 Hz – 22 kHz
Nominal impedance 4 ohms
Recommended amplifier power (RMS) 25-120 W/Ch
LED lighting No
LED supply voltage N/A
LED load current @ 14.4 VDC N/A
Operating temperature range 32° to 122° F (0° to 50° C)
Voice coil diameter 1.4″
Cone material CURV® Cone Technology with rubber surround
Tweeter type Silk dome
Compass-safe distance 141″ (358 cm)
Speaker connection Flying lead with water-resistant 2-way connector, 5.9″ (150 mm)
Warranty 3 years

Mounting dimensions

Mounting diameter clearance 6.14″ (156 mm)
Mounting depth clearance 3.39″ (86 mm)

Optimum enclosure recommendations

Sealed enclosure volume (fully filled with absorption material) 0.71 cubic ft (20 L)
Ported (vented) enclosure volume (lined with absorption material) 1.06 cubic ft (30 L)
Port diameter 3″ (76 mm)
Port length 6.3″ (160 mm)

  • One pair of speakers
  • 12 Phillips stainless steel mounting screws, 4.2 mm x 40 mm (8 gauge x 1.6”)
  • 2 water-resistant cable assemblies with 2-pin connector (5.9″ (150mm))
  • Documentation