Hertz Marine HMX 8 S 224mm 2 Way Powersport Coaxial Speakers 100w RMS
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The Hertz Marine HMX 8 S is an 8-inch (224 mm) 2-way powersport coaxial speaker rated at 100W RMS / 200W peak at 4 ohms. It features a UV-resistant polypropylene cone, Santoprene surround and a stainless steel tweeter mesh grille, designed for marine and open-air powersport installs. It is part of the Hertz Marine HMX range.
Key specifications
- Size: 8 inch (224 mm)
- Power handling: 100W RMS, 200W peak
- Impedance: 4 ohm
- Mounting depth: 123 mm (4.84 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
About the HMX 8 S
The HMX 8 S is the powersport variant of the Hertz Marine HMX 8 range, distinguished by its stainless steel tweeter mesh grille. It is optimised for infinite baffle installation, delivering solid bass and high output. The tweeter uses an acoustic lens tuned for best off-axis dispersion and maximum SPL. The UV-resistant polypropylene cone is co-moulded with a Santoprene rubber surround, and the basket and grille are injected with a high-temperature, UV-resistant polymer — together making the speaker resistant to water, dust and mud. An aramid fibre spider with silicone-insulated lead wires ensures long-term durability. High-excursion mobile equipment is driven by a large magnetic assembly for high, undistorted sound pressure.
Features
- Engineered and tested for real-world conditions: UV, salt-fog, vibrations, water spray, thermal shock and dust.
- 1.4 in neodymium magnet tweeter with PEI dome, faceplate and acoustic lens optimised for off-axis dispersion and maximum SPL.
- Sound-transparent stainless steel tweeter mesh grille for efficient high-frequency transfer and robust protection.
- Long-throw 32 mm (1.26 in) voice coil woofer tuned for infinite baffle, with UV-inhibited polypropylene cone and co-moulded Santoprene surround.
- Aramid fibre spider with silicone-insulated lead wires for durability and consistent performance over time.
- FEM-optimised high-excursion mobile equipment driven by a large magnetic group, encapsulated in a marine-grade polymer injected basket.
- Sealed built-in crossover with resettable solid-state tweeter protection circuit.
- Gold-plated, corrosion-resistant terminals.
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Specification
| Component | Powersport coaxial |
|---|---|
| Size mm (in.) | 224 (8.8) |
| Power Handling | - Continuous W 100 |
| Power Handling | - Peak W 200 |
| Impedance | Ohm 4 |
| Depth mm (in.) | 123 (4.84) |
| 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 8 S
Hertz
About the Hertz HMX 8 S
From our tech experts at CEN
Marine-grade coaxial speakers handling 100w 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 size is the HMX 8 S?
A: The HMX 8 S is an 8 inch coaxial speaker with a mounting depth of 123 mm (4.84 in).
Q: How much power can the HMX 8 S handle?
A: It is rated at 100W continuous and 200W peak power handling, with a 4 ohm impedance.
Q: Does the HMX 8 S have a built-in crossover?
A: Yes. It has a sealed built-in crossover with a resettable solid-state tweeter protection circuit.
