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.
| Size mm (in.) | 250 (10) |
| Power Handling - Continuous W | 250 |
| Power Handling - Peak W | 500 |
| Impedance Ohm | 4 |
| Depth mm (in.) | 174 (6.85) |
| Voice Coil Type | single |
| No Filter Component | SUBWOOFER |
| Voice Coil Ø | 50 (2) |
| Magnet size D x d x h mm (in.) | 140 x 60 x 30 (5.51 x 2.36 x 1.18) |
| Weight of one component kg (lb.) | 5,1 (11.24) |
| Magnet | High density flux ferrite |
| Cone | Polypropylene with UV inhibitors |
| Xmech mm (in.) | 16.30 (0.64) |
| D mm | 210 |
| Xmax mm | 12.30 |
| Re Ohm | 2.1 |
| Fs Hz | 43 |
| Le mH | 0.46 |
| Vas I | 30.46 |
| Mms g | 75.60 |
| Cms mm/N | 0.18 |
| BL T*m | 8.30 |
| Qts | 0.60 |
| Qes | 0.63 |
| Qms | 12.30 |
| Spl dB | 88.5 |
| A | 319 mm | 12.56 in. |
| B | 271.3 mm | 10.68 in. |
| C | 174 mm | 6.85 in. |
| D | 11.6 mm | 0.46 in. |
| U | 291 mm | 0.11 in. |
| V | 5.5 mm | 0.22 in. |
The protection grade IP65 for speakers define all the Hertz Marine products as totally protected against water jets of different entities, making them highly performant in the marine environment.
According to the severe ASTM-D4329 standards for UV resistance, all the materials used for Hertz Marine products are designed to face long time exposition to UV radiations while cruising on the open sea.
To satisfy the standards required by ASTM-B117, Hertz Marine products are tested with massive salt fog spray to ensure a complete resistance to corrosion, typical of this atmospheric agent.
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.
• 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
• 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
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.
