Hertz HEX 6.5" Marine Coax Speakers with White or Black Grilles

Engineered for open-water listening, the Hertz HEX 6.5" marine coaxial speakers deliver crystal-clear highs and dynamic midrange in even the most demanding sea conditions. With a compact 6.5" form factor and a shallow install depth of just 2.36 inches, these all-weather speakers fit tight spaces on boats, pontoons, and larger yachts without sacrificing sound.

Designed to withstand sun, salt, and spray, the HEX 6.5 M-W-O carries the Hertz Pure Marine certification. It meets IP65 protection, ASTM-D4329 UV standards for long-lasting color and durability, and ASTM-B117 salt fog operability, ensuring reliable performance season after season. This means your speakers stay resilient while delivering consistent sound, no matter the water you navigate.

Why this Hertz marine coaxial stands out

• High-efficiency, off-axis sound: The tweeter is engineered for wide, even dispersion thanks to FEM-simulated design, so passengers hear balanced highs from seating positions all around the boat. This makes late-afternoon cruising and anchored conversations clearer, even as bow wave and cabin noise rise.
• Premium build for marine environments: Polypropylene cone with UV inhibitors, a PEI dome, and silicone-insulated lead wires maximize durability against sun exposure and salt spray, reducing the risk of fatigue or signal loss over time.
• Robust, sealed crossover: The HEX 6.5 integrates a sealed crossover with protective circuitry to guard the tweeter, helping maintain clear treble even when power levels vary at sea. (This design detail is part of the product family’s marine-focused engineering.)
• Long-lasting connections: Nickel-plated, corrosion-resistant terminals ensure dependable wiring connections in salty air and humid environments.
• Low-profile, flexible installation: With a mounting depth of 2.36 inches and a 165 mm (6.5") woofer, these speakers are ideal for boat layouts where space is at a premium but you still demand punchy bass and articulate highs.
• Optionally stylish, two grille finishes: Choose between total-white (TW) or total-black (TC) grilles to suit your vessel’s interior—grilles are designed to blend with marine aesthetics while maintaining a tone-on-tone, protective mesh look.

Technical snapshot at a glance

• Size: 165 mm (6.5") coaxial speaker
• Impedance: 4 ohms
• Power handling: 50 W continuous, 100 W peak
• Frequency response: 50 Hz – 23 kHz
• Woofer: 25 mm (1") voice coil on a polypropylene cone with UV inhibitors
• Tweeter: 13 mm (0.5") voice coil with a neodymium magnet for crisp, extended highs
• Magnet & construction: High-density ferrite woofer magnet; neodymium tweeter magnet
• Depth: 85 mm (3.25 in)
• Weight: ~1 kg (2.2 lb) per speaker

Whether you’re cruising coastal bays, battling chop, or anchoring for sunset, the HEX 6.5" marine coaxial speakers are built to maintain clarity and reliability. Their robust construction, precise tonal balance, and marine-certified certification make them a compelling choice for boat owners who won’t compromise on sound.

Ideal use cases and installation scenarios

• Primary or secondary cabin locations on pontoons, runabouts, or flybridge boats where space is tight but sound quality matters.
• Open-water cruising setups where peak treble, midrange detail, and controlled bass improve communication on deck and enjoyment in cockpit seating.
• Durable marine environments prone to sun exposure, salt, and humidity—where UV resistance and salt-fog operability are essential.

Who this is for: Boaters who want reliable, detailed sound from a compact 6.5" coaxial, with marine-grade protection and a clean, modern grille aesthetic. It’s also ideal for installers seeking a durable, plug-and-play solution that can be integrated into existing marine audio systems without compromise.

How it compares to alternatives: Compared to non-marine coaxials, this Hertz HEX model delivers better UV resistance, IP-rated durability, and a specialized off-axis tweeter design that preserves high-frequency detail across seating positions. The integrated crossover and rugged terminals reduce installation headaches and future maintenance needs, making it a practical long-term choice for serious boats.

With Hertz’s marine-specific engineering behind every component—from the neodymium tweeter magnet to the silicone-insulated leads—these speakers are built to stay loud, clear, and reliable at sea. If you’re outfitting a new boat or upgrading an existing system, the HEX 6.5" marine coaxials deliver a balanced, immersive listening experience that stands up to the waves and the sun.