Hertz HMX 6.5 S-LD-G Premium LED Marine Coaxial Speaker

The HMX 6.5 S-LD-G is built for serious marine listening, delivering powerful, emotion-filled sound that withstands the harshest open-water conditions. Its sport-ready design features a paintable, high-strength grille that blends with any performance boat while providing rugged protection against sun, salt, and spray. Crafted around a UV-stabilized polypropylene cone and a co-molded Santoprene surround, this 6.5-inch marine coaxial speaker stays rigid in rough seas and remains durable year after year.

Inside, Hertz engineers have tuned every detail for maximum reliability in high-humidity marine environments. The aramid fiber spider, paired with silicone-insulated lead wires, keeps the moving parts stable and responsive even during heavy seas. A 1.4-inch neodymium tweeter with a PEI dome is paired with an optimized faceplate and acoustic lens to deliver wide off-axis dispersion and high SPL, so passengers across the cockpit enjoy crisp highs without fatigue.

The HMX 6.5 S-LD-G also features a sealed built-in crossover with a resettable solid-state tweeter protection circuit and gold-plated, corrosion-resistant terminals. An integrated LED accent adds a tasteful glow for nighttime boating, enhancing ambiance without distracting from performance. The result is a marine speaker that not only sounds exceptional but also stays protected and visually integrated with your vessel’s aesthetics.

Why this speaker stands out

• Marine-grade durability: IP65 protection and Hertz Pure Marine certification with UV resistance (ASTM-D4329) and salt fog operability (ASTM-B117).
• Professional-grade drivers: 1.4" neodymium tweeter with a PEI dome optimized for off-axis sound and maximum SPL; long-throw 25mm woofer voice coil for authoritative low end.
• Rugged, weatherproof construction: ASA plastic grille, co-molded Santoprene surround, and silicone-insulated leads designed for long-term marine use.
• Sealed crossover and protection: built-in, weather-ready crossover with resettable protection keeps highs clear and components safe even at high volume.
• Corrosion-resistant connections: gold-plated terminals to resist corrosion in salty marine environments.
• Integrated LED accent: adds subtle nighttime illumination that complements your boat’s cockpit lighting.
• Elegant, sport-focused aesthetics: a sleek, paintable grille that complements a performance boat’s lines while keeping protection front and center.

Technical snapshot

• Component: HI-END LED COAX
• Size: 165 mm (6.5 inches)
• Power Handling: 75 W RMS, 150 W peak
• Impedance: 4 Ω
• Depth: 95.6 mm (3.76 in)
• Tweeter diaphragm: 36 mm (1.4 in)
• Woofer Voice Coil Ø: 25 mm (1 in)
• Tweeter Voice Coil Ø: 20 mm (0.8 in)
• Frequency Response: 50 Hz – 25 kHz
• Woofer Magnet: High-density ferrite; Tweeter Magnet: Neodymium
• Cone: Polypropylene with UV inhibitors; Dome: PEI
• Net Weight (one speaker): ~1 kg (2.2 lb)

Who it's for and practical use

The HMX 6.5 S-LD-G is ideal for performance boats, center consoles, sport cruisers, and any marine setup where sound quality, durability, and reliability matter as much as style. Use it to upgrade factory speakers in open-c-water vessels, mount it in hardtop enclosures, or add a premium coaxial pair to create a balanced, immersive soundstage for days on the water. Its weatherproof design and robust construction mean you can count on consistent performance through salt spray, sun exposure, and seasonal humidity.

Installation notes and care tips

Designed for standard 6.5-inch cutouts, the HMX 6.5 S-LD-G integrates with most marine audio installations without requiring complex modifications. For best results, pair with compatible Hertz marine amplifiers and a weatherproof head unit to maximize SPL and dynamic range while preserving highs from harsh glare and wind noise. Regularly check connections for any signs of corrosion in salty environments and clean the grille and housing with fresh water after salt exposure to maintain the finish and seal integrity.

Upgrade your boat’s audio with a true marine-grade coaxial speaker that sounds as confident as your ride. The Hertz HMX 6.5 S-LD-G combines purpose-built durability, precise acoustic engineering, and a refined aesthetic to deliver an elevated listening experience on every voyage.