Hertz Marine Portofino 77 XC 7.7 Inch Flush Mount Coaxial Speakers 100w RMS
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The Hertz Marine Portofino 77 XC is a 7.7-inch (195 mm) 2-way flush-mount coaxial marine speaker rated at 100 W RMS / 200 W peak, from Hertz's Marine Portofino range. It features an ultra-low-profile fine mesh magnetic grille and is built for flush-mount installation in marine environments.
See also the Portofino 77 XW and the smaller Portofino 65 XC.
Key specifications
- Size: 195 mm (7.7 in)
- Type: 2-way flush-mount coaxial
- Power handling: 100 W RMS continuous, 200 W peak
- Impedance: 4 ohms
- Mounting depth: 108 mm (4.25 in)
- Tweeter: 36 mm (1.4 in) PEI dome, neodymium magnet
- Woofer voice coil: 32 mm (1.26 in)
- Frequency response: 45 Hz to 25 kHz
- Grille: fine mesh magnetic, tool-free attachment
Hertz Marine Portofino 77 XC
195 (7.7) mm (in.) | 108 (4.25) mm (in.) | Flush-mount Coax | 200 W | 4 Ohm
The Portofino 77 XC uses larger 7.7-inch drivers to deliver greater dynamics and depth. Its flush-mount design and ultra-low-profile grille sit discreetly in marine interiors, while marine-grade materials resist UV, salt, and moisture.
Features
- Italian-inspired design — discreet styling suited to luxury yacht interiors.
- Flush-mount architecture — ultra-low-profile installation for a clean finish.
- Fine mesh magnetic grille — tool-free, secure attachment.
- Marine-grade materials — resistant to UV, salt, and moisture.
- 2-way coaxial driver — 36 mm PEI dome tweeter with neodymium magnet over a 7.7-inch woofer.
Explore the full range in Hertz Marine Speakers & Subwoofers.
Specification
| Component | FLUSH-MOUNT COAX |
|---|---|
| Size mm (in.) | 195 (7.7) |
| Power Handling | - Continuous W 100 |
| Power Handling | - Peak W 200 |
| Impedance | Ohm 4 |
| Depth mm (in.) | 108 (4.25) |
| Tweeter diaphragm mm (in.) | 36 (1.4) |
| Woofer Voice Coil Ø mm (in.) | 32 (1.26) |
| Tweeter Voice Coil Ø mm (in.) | 20 (0.8) |
| Frequency Response | Hz 45 ÷ 25k |
| Woofer Magnet size D x d x h mm (in.) | 90 x 40 x 20 (3.54 x 1.57 x 0.79) |
| Tweeter Magnet size D x h mm (in.) | 19,7 x 3 (0.78 x 0.12) |
| Weight | of one speaker kg (lb.) 1 (2.2) |
| Woofer Magnet | High density flux ferrite |
| Tweeter Magnet | Neodymium |
| Cone | Polypropylene with UV inhibitors |
| Dome | PEI |
| Xmech mm (in.) | ±6,65 (0.26) |
What's Included
- PORTOFINO 77 XC
Hertz
About the Hertz PORTOFINO 77 XC
From our tech experts at CEN
The Hertz Marine Portofino 77 XC is a 7.7 inch (195mm) 2-way flush-mount coaxial marine speaker rated at 100W RMS and 200W peak. It pairs a 36mm PEI dome tweeter with neodymium magnet against a UV-inhibited polypropylene woofer cone. The fine mesh magnetic grille attaches tool-free and keeps the profile low for a clean interior finish.
Who it suits
The Portofino 77 XC suits boat and yacht owners who want discreet, quality audio in a flush-mount format. The 7.7 inch drivers cover 45Hz to 25kHz, offering good range without a separate subwoofer. If you do want to add one, the Hertz PowerSports HMP 1D marine amplifier is a natural companion.
Our tech experts advise
Allow at least 108mm of mounting depth behind your surface before cutting. The speaker runs at 4 ohms, so verify your source unit or amplifier output is compatible. Marine-grade materials resist UV, salt, and moisture; avoid directing high-pressure water at the grilles. For installation enquiries, contact our Nottingham team.
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 size is the Portofino 77 XC?
A: It is a 7.7-inch speaker, measuring 195 mm, with a mounting depth of 108 mm (4.25 in).
Q: How much power can the Portofino 77 XC handle?
A: It is rated at 100 W continuous and 200 W peak at 4 ohms.
Q: How is the Portofino 77 XC grille attached?
A: It uses a fine mesh magnetic grille with secure, tool-free attachment.
