Hertz Marine HMX 7.7 S-LD-G 7.7 Inch 2 Way RGB LED Coaxial Speakers 100w RMS
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The Hertz Marine HMX 7.7 S-LD-G is a 7.7 inch (196 mm) 2-way hi-end marine coaxial speaker rated at 100W RMS (200W peak) at 4 ohms, with integrated RGB LED lighting. Built with a UV-resistant polypropylene cone, Santoprene surround and a sealed crossover, it is designed for boats and other open-air installs. It is part of the Hertz Marine HMX range.
This listing is for the S-LD-G (sport paintable grille) variant. The HMX 7.7 is also available in the Hertz Marine HMX 7.7 S-LD-SW.
Key specifications
- Size: 7.7 inch (196 mm)
- Power handling: 100W RMS, 200W peak
- Impedance: 4 ohm
- Mounting depth: 113 mm (4.4 in)
- Frequency response: 45 Hz to 25 kHz
- Tweeter: 36 mm (1.4 in) PEI dome, neodymium magnet
- Woofer voice coil: 32 mm (1.26 in)
- Weight: 1.66 kg per speaker
- Lighting: integrated RGB LEDs (HM RGB 1 BK accessory)
Hertz Marine HMX 7.7 S-LD-G
The HMX 7.7 S-LD-G features a paintable sport grille made from ASA plastic, designed to complement sporty boats. The speaker is built to perform in open-water environments, with a polypropylene cone, co-moulded Santoprene surround, and an Aramid fibre spider with silicone-insulated lead wire for lasting durability. Parts and assembly methods are spec'd to handle high-humidity marine conditions, delivering consistent audio performance season after season.
Features
- Integrated RGB LED lighting, compatible with the HM RGB 1 BK accessory.
- Hertz Pure Marine Certified: IP65 protection grade, ASTM-D4329 UV resistance, and ASTM-B117 salt fog operability.
- 1.4 in neodymium magnet tweeter with PEI dome, faceplate and acoustic lens optimised for off-axis dispersion and high SPL.
- Sound-transparent sport grille for efficient high-frequency transfer and solid protection.
- Long-throw 32 mm (1.26 in) voice coil woofer tuned for infinite baffle applications.
- Sealed built-in crossover with resettable solid-state tweeter protection circuit.
- Gold-plated corrosion-resistant terminals.
Explore the full range in Hertz Marine Speakers & Subwoofers.
Specification
| Component | HI-END LED COAX |
|---|---|
| Size mm (in.) | 196 (7.7) |
| Power Handling | - Continuous W 100 |
| Power Handling | - Peak W 200 |
| Impedance | Ohm 4 |
| Depth mm (in.) | 113 (4.4) |
| 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.) 1,66 (3.66) |
| Woofer Magnet | High density flux ferrite |
| Tweeter Magnet | Neodymium |
| Cone | Polypropylene with UV inhibitors |
| Dome | PEI |
| Xmech mm (in.) | ±8,5 (0.33) |
What's Included
- HMX 7.7 S-LD-G
Hertz
About the Hertz HMX 7.7 S-LD-G
From our tech experts at CEN
The Hertz Marine HMX 7.7 S-LD-G is a 7.7 inch (196 mm) 2-way coaxial speaker, rated at 100W RMS and 200W peak, built for marine and open-air installations. It carries IP65 protection, ASTM-B117 salt fog certification and ASTM-D4329 UV resistance, with a UV-inhibited polypropylene cone and Santoprene surround. This S-LD-G variant includes a paintable ASA sport grille and integrated RGB LED lighting compatible with the HM RGB 1 BK accessory.
Who it suits
These suit boat owners who want a durable, purpose-built speaker with lighting effects in a single coaxial unit. The 7.7 inch format works well in larger mounting positions on cruisers and sports boats. For a marine amplifier to pair with these, consider the Hertz PowerSports HMP 1D.
Our tech experts advise
Check your mounting panel has at least 113 mm of depth before fitting. The sport grille is paintable; keep paint away from the cone and surround. Use marine-grade wiring throughout, as the gold-plated terminals are designed to resist corrosion in high-humidity conditions. Browse the full Hertz range for compatible components.
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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 HMX 7.7 S-LD-G?
A: The HMX 7.7 S-LD-G is a 7.7 inch (196 mm) coaxial speaker with a mounting depth of 113 mm (4.4 in).
Q: How much power can the HMX 7.7 S-LD-G handle?
A: It is rated at 100W continuous and 200W peak power handling, with a 4 ohm impedance.
Q: Does the HMX 7.7 S-LD-G have LED lighting?
A: Yes. It has integrated RGB LED lighting, designed to be used with the Hertz HM RGB 1 BK accessory.
