Hertz Marine HEX 6.5 M-C-O 6.5 Inch 2 Way 4 Ohm Coaxial Speakers 50w RMS
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The Hertz Marine HEX 6.5 M-C-O is a 6.5 inch (165 mm) 2-way marine coaxial speaker rated at 50W RMS (100W peak) at 4 ohms, with a Marine Total Black mesh grille. It carries the Hertz Pure Marine Certified stamp with IP65 protection, UV and salt fog resistance.
This listing is the Marine Total Black version. The HEX 6.5 M is also available in Marine Total White (HEX 6.5 M-W-O).
Key specifications
- Size: 6.5 inch (165 mm) 2-way coaxial
- Power: 50W RMS, 100W peak
- Impedance: 4 ohms
- Mounting depth: 60.5 mm (2.38 in)
- Overall depth: 85 mm (3.35 in)
- Frequency response: 50 Hz – 23 kHz
- Protection: IP65, ASTM-D4329 UV, ASTM-B117 salt fog
- Grille: Marine Total Black mesh grille
Hertz Marine HEX 6.5 M-C-O
The HEX 6.5 M-C-O pairs marine-ready durability with a sleek Marine Total Black mesh grille. With a mounting depth of 60.5 mm (2.38 in) and 85 mm (3.35 in) overall, it suits a wide range of in-boat installations. Certified with the Hertz Pure Marine stamp, it meets IP65, ASTM-D4329 UV, and ASTM-B117 salt fog standards.
The high-efficiency tweeter, optimised through FEM simulation, ensures accurate off-axis dispersion suited to typical in-boat install positions. The 25 mm (1") voice coil woofer is fine-tuned for infinite baffle applications and uses silicone-insulated lead-wire for long-term reliability. A sealed built-in crossover with resettable tweeter protection and nickel-plated corrosion-resistant terminals complete the package.
Features
- Hertz Pure Marine Certified: IP65 protection, ASTM-D4329 UV resistance, ASTM-B117 salt fog operability.
- High-efficiency tweeter designed with FEM simulation to maximise off-axis emission for in-boat installations.
- Sound-transparent mesh grille with twist-and-lock system for protection and a clean finish.
- 25 mm (1") voice coil woofer fine-tuned for infinite baffle applications with silicone-insulated lead-wire.
- Sealed built-in crossover with resettable solid-state tweeter protection circuit.
- Nickel-plated corrosion-resistant terminals.
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Specification
| Component | COAX |
|---|---|
| Size mm (in.) | 165 (6.5) |
| Power Handling | - Continuous W 50 |
| Power Handling | - Peak W 100 |
| Impedance | Ohm 4 |
| Depth mm (in.) | 85 (3.35) |
| Woofer Voice Coil Ø mm (in.) | 25 (1) |
| Tweeter Voice Coil Ø mm (in.) | 13 (0.5) |
| Frequency Response | Hz 50 ÷ 23k |
| Woofer Magnet size D x d x h mm (in.) | 85 x 32 x 15 (3.35 x 1.26 x 0.59) |
| Tweeter Magnet size D x h mm (in.) | 12,9 x 2 + 11 x 1,9 (0.51 x 0.08 + 0.43 x 0.07) |
| 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.) | ±4,8 (0.19) |
What's Included
- HEX 6.5 M-C-O
Hertz
About the Hertz HEX 6.5 M-C-O
From our tech experts at CEN
Marine-grade HEX series 6.5 inch coaxial speakers handling 50w 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 power does the HEX 6.5 M-C-O handle?
A: 50W RMS continuous and 100W peak, at 4 ohms.
Q: What mounting depth does the HEX 6.5 M-C-O need?
A: It is a 6.5 inch (165 mm) speaker with a mounting depth of 60.5 mm (2.38 in) and an overall depth of 85 mm (3.35 in).
Q: Does the HEX 6.5 M-C-O have a built-in crossover?
A: Yes. It has a sealed built-in crossover with a resettable solid-state tweeter protection circuit.
