Home > Marine Audio > Subwoofers > Portofino > PORTOFINO 100 S4W

PORTOFINO 100 S4W Subwoofer Driver | 500 W Peak Power | 4 ohm | 250 mm

The PORTOFINO 100 S4W delivers powerful, refined bass designed to complement the elegance of luxury yachts. Its 10-inch flush-mount design ensures seamless integration into sophisticated marine interiors, while producing deep, controlled low frequencies that enrich every listening experience at sea. Crafted with premium marine-grade materials, it withstands UV rays, salt, and moisture, guaranteeing lasting performance in the harshest conditions. The fine mesh magnetic grille provides a sleek, ultra-low-profile finish, blending perfectly into the yacht’s architecture. For those who expect both uncompromising sound and timeless style, the PORTOFINO 100 S4W redefines marine audio excellence.
Technical Specs
Nominal diameter 250 mm (10 in)
Impedance 4 Ohm
Power Handling - Peak 500 W
Power Handling - Continuous 250 W
Voice Coil Ø 50 mm (2 in)
Magnet Material HIGH DENSITY FLUX FERRITE
Cone Material POLYPROPYLENE WITH UV INHIBITORS
Xmax 12.3 mm (0.48 in)
Xmech 16.3 mm (0.64 in)
Electric-acoustic Specs
D 210 mm (32.55 in)
Re 2.1 Ohm
Fs 43 Hz
Le 0.46 mH
Vas 30.46 l (1.076 ft)
Mms 75.6 g (2.667 oz)
Cms 0.18 mm/N
BL 8.3 T•m
Qts 0.6
Qes 0.63
Qms 12.3
Spl 88.5 dB
General
Grilles Included Yes
Dimensions
PORTOFINO 100 S4W
Dimension A 319 mm (12.56 in)
Dimension B 271.3 mm (10.68 in)
Dimension C 174 mm (6.85 in)
Dimension D 11.6 mm (0.46 in)
Dimension U 291 mm (11.46 in)
Dimension V 5.5 mm (0.22 in)

Frequency Response

Features
PORTOFINO 100 S4W
  • Powerful low frequencies – deep, impactful bass that enhances every voyage.
  • Flush-mount design – ultra-low-profile installation for seamless integration.
  • Fine mesh magnetic grille – elegant look with secure, tool-free attachment.
  • Premium marine-grade materials – built to resist UV, salt, and moisture.
  • 10-inch subwoofer performance – engineered for rich, controlled bass in open-air environments.
  • Luxury-focused design – crafted to blend perfectly into exclusive yacht interiors.
  • Benchmark value – premium sound and design with the best price-to-performance ratio in its class.

Hertz PORTOFINO

MARINE FLUSH MOUNTING

WHERE ITALIAN
ELEGANCE MEETS
MARINE AUDIO
EXCELLENCE

PREMIUM MARINE SOUND, FLUSH-MOUNTED ELEGANCE

The Portofino Line by Hertz Marine brings sophisticated design and outstanding audio to luxury vessels. With its flush-mount architecture and marine-grade materials, Portofino delivers stunning sound while integrating seamlessly into high-end yacht environments. Offering premium quality with a class-leading price-performance ratio, Portofino redefines excellence in marine audio.

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Portofino 100 S2W

10” 2Ω Flush-Mount Marine Subwoofer
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Long-excursion woofer with optimized motor and suspension systems for deep, impactful bass in infinite-baffle setups.

Portofino 100 S4W

10” 4Ω Flush-Mount Marine Subwoofer
500 W

Long-excursion woofer with optimized motor and suspension systems for deep, impactful bass in infinite-baffle setups.

THE ITALIAN WAY OF DESIGN AND SOUND
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DESIGNED FOR THE FINEST YACHTS

• Low-profile fine mesh grille with magnetic mounting for a clean, screw-free finish
• Coaxial speakers with concentric tweeter design for smooth, wide sound dispersion
• Minimal visual impact, maximum acoustic performance
• White marine-grade finish tailored for luxury marine interiors
• Built to pair with Hertz Marine amplifiers for dynamic, powerful playback

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BUILT FOR REAL MARINE DUTY

• Salt-fog and UV resistant (compliant with ASTM B117/D4329 standards)
• Waterproof construction with drainage and anti-resonance features
• Corrosion-proof terminals and sealed crossover networks
• Designed for infinite-baffle applications, no enclosure required

LUXURY THAT PERFORMS

Portofino is not just audio equipment it is a fusion of Italian design, marine engineering, and sonic craftsmanship.
For those who demand elegance, performance, and resilience on the open sea.

PURE MINIMALISM. MAXIMUM IMPACT.

PORTOFINO’s magnetic grille system not only allows for fast service access , it creates a floating, frameless look that complements any surface or material.

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