Hertz Marine Portofino 100 S4C 10 Inch Flush Mount 4 Ohm Subwoofer 250w RMS
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The Hertz Marine Portofino 100 S4C is a 10-inch flush-mount marine subwoofer rated at 250 W RMS, with a single 4 ohm voice coil. It is part of the Hertz Marine Portofino line, designed for luxury yacht and open-air marine installations.
This listing is the 4 ohm single voice coil version (S4C), sold as a single subwoofer. The Portofino 100 is also available as the Portofino 100 S4W and the 2 ohm Portofino 100 S2C.
Key specifications
- Size: 250 mm (10 in)
- Power handling: 250 W continuous, 500 W peak
- Impedance: 4 ohms, single voice coil
- Mounting depth: 174 mm (6.85 in)
- Voice coil: 50.8 mm (2 in)
- Total weight: 5.8 kg (12.79 lb)
- Cone: polypropylene with UV inhibitors
- Xmech: 16.3 mm (0.64 in)
- Grille: fine mesh magnetic, tool-free attachment
- Mounting: flush mount
Hertz Marine Portofino 100 S4C (sold as single)
The Portofino 100 S4C is a 10-inch flush-mount subwoofer built for luxury marine environments. It delivers deep, controlled bass and is constructed from premium marine-grade materials to withstand UV exposure, salt water, and moisture. The ultra-low-profile magnetic grille attaches tool-free and integrates cleanly into yacht interiors.
Features
- Deep, impactful bass performance in open-air marine environments.
- Flush-mount design for low-profile, seamless installation.
- Fine mesh magnetic grille with tool-free attachment.
- Marine-grade materials resistant to UV, salt, and moisture.
- Polypropylene cone with UV inhibitors.
- 10-inch driver engineered for rich, controlled bass output.
Explore the full range in Subwoofers.
Specification
| 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 50.8 (2) |
| Magnet | size D x d x h mm (in.) 140 x 60 x 30 (5.51 x 2.36 x 1.18) |
| Total weight kg (lb.) | 5.8 (12.79) |
| Magnet | High density flux ferrite |
| Cone | Polypropylene with UV inhibitors |
| Xmech mm (in.) | 16.30 (0.64) |
What's Included
- PORTOFINO 100 S4C
Hertz
About the Hertz PORTOFINO 100 S4C
From our tech experts at CEN
Marine-grade 10 inch coaxial speakers handling 250w RMS, built with UV-stable materials and corrosion-resistant hardware for life in sun, salt and spray.
Who it suits
Boats, ribs and open builds, and campers with an outdoor listening area. Anything mounted where rain reaches it should be marine-rated, whatever the vehicle.
Our tech experts advise
In a marine install the wiring decides longevity: tinned cable, sealed joints and a properly fused feed. Mounting position affects the sound more than the speaker choice, because there are no cabin walls to help you. get in touch and we will talk through mounting, wiring and power for your boat.
Explore the full Hertz range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Hertz
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Frequently Asked Questions
Q: What makes marine speakers different from car speakers?
A: Marine speakers are built with UV-stable, water-resistant cones, grilles and hardware designed for open-air and wet environments. They are the right choice for boats, jet skis, hot tubs and outdoor installs.
Q: Are these speakers fully waterproof?
A: Marine speakers are water-resistant to marine ratings rather than submersible. The IP rating, where provided, is listed in the Specification tab.
Q: Do I need a marine amplifier as well?
A: For best results, yes. Marine amplifiers carry conformal-coated boards that resist moisture and salt air. Match the amplifier to the RMS rating in the Specification tab as you would with any system.
Q: Will these work outside of marine use?
A: Yes. Marine speakers are popular for motorcycles, quads, hot tubs, garden bars and anywhere the weather reaches. Their durability makes them a strong outdoor choice.
Q: What impedance is the Portofino 100 S4C?
A: It has a single 4 ohm voice coil.
Q: What mounting depth does the Portofino 100 S4C need?
A: It needs a mounting depth of 174 mm (6.85 in) and measures 250 mm (10 in).
Q: How much power can the Portofino 100 S4C handle?
A: It is rated at 250 W continuous and 500 W peak.
Q: How much does the Portofino 100 S4C weigh?
A: Hertz lists the total weight as 5.8 kg (12.79 lb).
