Hertz 8" Marine Coaxial System with LED Lighting
Professionally Maintained Demo Units
Every demo unit has been carefully maintained by our certified technicians. These aren't customer returns or damaged goods - they're the same high-quality equipment we've used to demonstrate premium sound to our customers for years.
Pre-Tested & Verified
Unlike typical clearance sales, every item has been tested and verified by our technical team. We stand behind the quality of our relocation inventory.
Everything Must Go Pricing
These aren't regular sale prices - this is genuine "moving warehouse" pricing. Discounts you simply won't find under normal retail circumstances.
Trade Show Display Models
Many items are pristine display models from major audio trade shows - equipment that's been seen but never installed. These pieces often include special editions or limited releases not available through regular retail channels.
Hertz HMX 8 LD Marine Coaxial
8.8" Hi-End Marine Speakers with Integrated RGB LED
Italian-Engineered Marine Audio Excellence
IP65 Waterproof • UV/Salt-Fog Tested • 100W RMS
📦 New Old Stock — Unopened Factory Condition
These Hertz HMX 8 LD speakers are brand new, never installed, in original factory packaging. "New Old Stock" (NOS) means these are authentic Hertz Marine speakers from previous production runs that were never sold or installed — remaining in perfect unused condition. While no longer in current production, these represent the same Italian engineering excellence and marine-grade construction that made Hertz Marine a benchmark in the industry. Exceptional value for enthusiasts seeking authentic Hertz quality at reduced pricing.
Hertz: Italian Audio Excellence Since 1998
🇮🇹 Italian Heritage Since 1979
In 1998, Elettromedia (Italian manufacturer of consumer audio products since 1979) created the Hertz brand, quickly becoming a world leader in the loudspeaker marketplace. Based in Italy, Hertz represents decades of electroacoustic expertise combined with Italian design philosophy: precision engineering, aesthetic elegance, and uncompromising performance standards.
🏆 Award-Winning Innovation
Hertz products have earned multiple EISA Awards (European Imaging and Sound Association) and CES Innovations Awards for technological breakthroughs including V-cone® technology, Tetolon fiber domes, and Boundary Free Surrounds. The brand's commitment to research-driven innovation has established Hertz as a reference standard for high-fidelity mobile audio worldwide.
⚓ Marine & Powersports Expansion
Launched in 2016, Hertz Marine applied 20 years of car audio engineering excellence to the harsh marine environment. Every marine product undergoes rigorous testing to ASTM standards: IP65 water jet resistance, ASTM-D4329 UV radiation exposure, ASTM-B117 salt-fog corrosion testing. The result: authentic "Hertz Sound Experience" for boats, ATVs, and motorcycles with uncompromising durability.
Hertz's philosophy combines premium sound quality, living tradition, ingenious innovation, and high quality manufacturing — creating products that transfer the emotions of live music performance to the most challenging listening environments.
Marine-Grade Engineering: Built for the Elements
1 IP65 Water Jet Protection
The HMX 8 LD carries IP65 protection grade certification, defining these speakers as totally protected against water jets of varying intensities. IP65 means complete dust ingress protection (first digit "6") and protection against water jets from any direction (second digit "5"). This exceeds typical splash-resistant ratings, ensuring reliable operation when waves crash over the bow, rain pours during storms, or wash-down hoses spray the deck. Marine environments demand this level of protection — IP65 delivers it.
IP65 = 6 (dust-tight) + 5 (water jet resistant). Higher protection than IP54 (splash resistant) or IP64 (heavy splash resistant).
2 UV Radiation Resistance (ASTM-D4329)
Engineered to meet ASTM-D4329 standards for UV resistance, all materials used in the HMX 8 LD are designed to withstand prolonged UV radiation exposure while cruising on open water. The polypropylene cone features UV inhibitors that prevent degradation, discoloration, and brittleness caused by continuous sunlight exposure. Standard speakers use untreated materials that crack, fade, and fail within 1-2 seasons in marine environments. Hertz Marine materials maintain structural integrity and performance for years under relentless sun exposure.
ASTM-D4329 simulates years of outdoor UV exposure using accelerated aging chambers with UV-A and UV-B radiation cycles.
3 Salt Fog Corrosion Testing (ASTM-B117)
To satisfy ASTM-B117 standards, Hertz Marine products undergo massive salt-fog spray testing to ensure complete resistance to corrosion. The HMX 8 LD features gold-plated corrosion-resistant terminals, marine-grade polymer injection-molded baskets, and stainless steel mesh grilles — all tested in accelerated salt-fog chambers that simulate years of coastal and saltwater exposure in days. Standard automotive speakers corrode rapidly in marine environments — bolts seize, terminals oxidize, baskets rust. Hertz Marine components survive this atmospheric assault intact.
ASTM-B117 salt-fog testing exposes components to 5% sodium chloride solution spray at 95°F continuously — simulating decades of marine environment exposure.
4 Integrated RGB LED Lighting
The HMX 8 LD features built-in RGB LED lighting that creates sophisticated atmosphere on your vessel, adding visual excitement to nighttime cruising or dockside entertaining. When combined with the optional HM RGB 1 BK controller (sold separately), the LEDs can be customized to any color, synchronized across multiple speakers, or programmed to react to music tempo. The RF remote control provides wireless color selection from anywhere on deck. RGB lighting is fully waterproof and integrated into the speaker design — not an aftermarket add-on.
RGB LED technology enables 16.7 million color combinations — from subtle ambient lighting to vibrant party modes.
5 1.4" Neodymium Tweeter with PEI Dome
The HMX 8 LD's tweeter features a 1.4" (35mm) PEI dome driven by a powerful neodymium magnet. PEI (Polyetherimide) is a high-performance thermoplastic offering exceptional rigidity, thermal stability, and damping properties — superior to silk, aluminum, or titanium domes for marine applications. The neodymium magnet provides high flux density in a compact, lightweight package resistant to corrosion. The faceplate and acoustic lens are optimized for best off-axis dispersion and highest SPL, ensuring clear highs reach all passengers on deck despite wind noise and open-air acoustics.
Neodymium magnets deliver 2-3× the magnetic flux of ferrite magnets at 1/3 the weight — critical for marine weight budgets and corrosion resistance.
6 Long-Throw Woofer for Infinite Baffle Application
The 1.26" (32mm) long-throw voice coil woofer is fine-tuned specifically for infinite baffle marine applications — mounting directly to fiberglass or panels without enclosed boxes. The polypropylene cone with UV inhibitors and co-molded Santoprene surround deliver weather-resistant durability while the ±8.5mm Xmech provides substantial excursion capability. The aramid fiber spider with silicone-insulated lead wires ensures durability and constant performance over time, even under continuous vibration and moisture exposure typical of marine environments.
Infinite baffle mounting uses the boat hull as the rear enclosure — simpler installation with no boxes consuming interior space.
Complete Technical Specifications
Italian-engineered marine coaxial speakers with integrated RGB LED lighting
Perfect Applications for Marine HMX 8 LD
Marine Boat Installations
Designed specifically for the harsh marine environment — boats, yachts, pontoons, sailboats. The IP65 water jet protection, UV-resistant materials, and salt-fog tested components ensure reliable performance cruising coastal waters or freshwater lakes. RGB LED lighting adds sophisticated atmosphere for evening entertaining or dockside parties. 91 dB sensitivity delivers high output competing with wind and wave noise.
Powersports Applications
Perfect for ATVs, UTVs, side-by-sides, motorcycles, golf carts exposed to outdoor elements. The same UV, water, and corrosion resistance that protects against saltwater protects against mud, dust, rain, and sun exposure in off-road environments. Lightweight marine-grade polymer basket and compact mounting depth fit tight powersports installations. RGB LEDs add visual excitement to trail rides and events.
Infinite Baffle Marine Mounting
The HMX 8 LD is fine-tuned for infinite baffle applications — mounting directly to fiberglass panels, boat hulls, or bulkheads without enclosed boxes. This simplifies installation while preserving precious interior space. The long-throw 32mm voice coil and ±8.5mm excursion deliver surprising bass output using the boat structure as the rear enclosure. Gold-plated terminals and sealed crossover ensure waterproof reliability.
High-Fidelity Marine Audio Systems
Audiophile-grade marine systems benefit from Hertz's Italian engineering heritage. The 45 Hz - 25 kHz frequency response, PEI dome tweeter, and FEM-optimized mobile equipment deliver the "Hertz Sound Experience" on water — accurate frequency response, wide dispersion, and low distortion. The 100W RMS power handling pairs perfectly with quality marine amplifiers for serious sound enthusiasts who refuse to compromise on water.
RGB LED Lighting Synchronized Systems
Combined with the HM RGB 1 BK controller (sold separately), multiple HMX 8 LD speakers create synchronized lighting effects throughout your vessel. Color-match your boat's accent lighting, create music-reactive light shows, or set ambient mood lighting for evening cruising. The RF remote control allows wireless adjustment from anywhere on deck. RGB LEDs are fully integrated and waterproof — not aftermarket stick-on accessories.
High-SPL Open-Air Environments
The 91 dB sensitivity and 200W peak power handling enable these 8.8" coaxials to compete with open-air acoustic challenges — wind noise, engine sounds, water splash, and lack of reflective surfaces that reinforce sound. The neodymium tweeter with optimized acoustic lens ensures high frequencies reach all passengers on deck despite challenging acoustics. Perfect for boats cruising at speed or powersports vehicles in motion.
💡 Why Marine-Grade Components Matter: The Failure Modes
UV Radiation: The Silent Killer
Standard automotive speakers use polypropylene cones without UV inhibitors. Under continuous sun exposure (boats, open-cockpit vehicles), UV radiation breaks down the polymer chains in 6-18 months, causing brittleness, cracking, and disintegration. The cone literally crumbles when touched. Hertz Marine cones feature UV inhibitor additives that absorb UV radiation before it damages the polymer structure, maintaining flexibility and strength for years. The same applies to the Santoprene surround — standard rubber surrounds dry out, crack, and fail. Santoprene is a thermoplastic elastomer specifically formulated for outdoor UV exposure, used in automotive bumpers and outdoor equipment. Result: 5-10× longer lifespan in sun exposure.
Salt Corrosion: The Inevitable Destruction
Saltwater and salt-laden air are exceptionally corrosive. Standard speaker baskets (steel), terminals (tin-plated copper), and fasteners (zinc-plated steel) corrode rapidly in marine environments. Corrosion manifests as: seized mounting screws (impossible to remove), oxidized terminals (intermittent connection), rust-through baskets (structural failure), and white powder corrosion products (electrical shorts). Hertz Marine uses marine-grade polymer injection-molded baskets (non-metallic = no corrosion), gold-plated terminals (noble metal resists oxidation), and stainless steel grilles. ASTM-B117 salt-fog testing exposes components to 5% NaCl spray continuously — accelerating years of coastal exposure into days. Only components passing this test survive marine use.
Water Ingress: The Short Circuit Catastrophe
Water entering speaker voice coils, crossover circuits, or terminal connections causes immediate failure. Voice coils short-circuit (cone stops moving), crossover capacitors fail (tweeter overdrive and destruction), and terminals oxidize (intermittent connection or complete failure). IP65 protection means complete dust sealing (first digit "6") and water jet protection from any direction (second digit "5"). The speaker can survive direct hose spray, waves washing over decks, and heavy rain without water ingress. The sealed built-in crossover is potted or epoxy-encapsulated, preventing water from reaching electronic components. Standard automotive speakers are IP54 at best (splash resistant) — they fail when directly sprayed. IP65 = survives wash-down and wave action.
Why Automotive Speakers Fail in Marine Use
"I'll just use cheap car speakers on my boat" is a common mistake with predictable failure timeline: Month 1-3: Terminals corrode, creating intermittent connection (speaker cuts in/out). Month 3-6: Cone and surround begin UV degradation, losing flexibility (distortion increases, bass output drops). Month 6-12: Basket corrosion weakens mounting, cone UV damage causes cracking, surround dry-rot creates tears (complete failure). Meanwhile, Hertz Marine speakers engineered to ASTM standards survive 5-10+ years in the same environment. The initial cost difference is recovered by not replacing speakers annually, plus you enjoy reliable performance without intermittent failures ruining weekend trips. Marine-grade isn't marketing — it's survival engineering.
📦 What's Included in This Listing
2× Hertz HMX 8 LD Marine Coaxial Speakers (Pair)
Integrated RGB LED Lighting (Built-In)
Stainless Steel Mesh Grilles (Pre-Installed)
Sealed Built-In Crossover with Tweeter Protection
Gold-Plated Corrosion-Resistant Terminals
Mounting Hardware (Screws/Fasteners)
Original Factory Packaging (New Old Stock)
Installation Manual & Documentation
⚠️ NOTE: RGB Controller (HM RGB 1 BK) sold separately — Required to control LED colors, synchronization, and music-reactive modes. Without controller, LEDs operate in default static color mode. Controller includes RF remote control for wireless operation.
🔧 Professional Marine Installation Tips
1️⃣ Sealant Application
Even with IP65 rating, apply marine-grade silicone sealant around mounting cutouts before installation. This creates additional water barrier preventing intrusion behind the speaker. Use clear or color-matched sealant for professional appearance. Allow 24 hours curing time before exposure to water.
2️⃣ Wire Routing & Protection
Route speaker wires through protective conduit or loom to prevent chafing against fiberglass edges. Use marine-grade tinned copper wire (minimum 16 AWG for 8" speakers). Seal wire entry points with silicone or marine putty. Avoid running wires through bilge areas or where standing water accumulates.
3️⃣ Infinite Baffle Backing
For infinite baffle installations, ensure adequate open space behind mounting location (minimum 1-2 cubic feet per speaker). Seal mounting panel edges to prevent sound cancellation. Consider adding backing material (closed-cell foam) to prevent sound leakage into living spaces if mounting to cabin bulkheads.
4️⃣ Mounting Hardware Selection
Use stainless steel (316 grade) mounting screws in saltwater applications. Standard zinc-plated or galvanized screws corrode rapidly. Pre-drill pilot holes slightly smaller than screw diameter to prevent fiberglass cracking. Apply anti-seize compound to threads for future removal.
5️⃣ RGB LED Wiring
If using HM RGB 1 BK controller, plan wire routing for RGB signal cable (separate from speaker wires). The controller requires 12V power supply and outputs RGB signal to all connected speakers. Use supplied connectors and follow polarity carefully — reversed polarity damages LED circuitry.
6️⃣ Amplifier Power Recommendations
The HMX 8 LD handles 100W RMS continuous. Use marine-grade amplifiers delivering 75-125W RMS @ 4Ω per channel for optimal performance. Avoid underpowering (causes amplifier clipping and tweeter damage) or massive overpowering (risks voice coil thermal failure during sustained high-volume operation).
Italian Marine Audio Excellence
The Hertz HMX 8 LD represents authentic Italian engineering applied to the harsh marine environment. With IP65 water jet protection, ASTM-certified UV and salt-fog resistance, and integrated RGB LED lighting, these coaxial speakers deliver the legendary "Hertz Sound Experience" on water. The 1.4" neodymium PEI dome tweeter, long-throw polypropylene woofer, and FEM-optimized marine-grade construction ensure reliable performance season after season.
As new old stock, these speakers represent exceptional value — authentic Hertz Marine quality from previous production runs, brand new in factory packaging, at significantly reduced pricing. Whether upgrading boat audio, building a powersports sound system, or creating an RGB-synchronized marine entertainment system, the HMX 8 LD delivers Italian audio excellence engineered to survive the elements.
New Old Stock • IP65 Waterproof • UV & Salt-Fog Tested • 100W RMS • Neodymium Tweeter • Made in Italy
Hertz 8" Marine Coaxial System with LED Lighting
Frequently Asked Questions
Are these items authentic, and why are the prices so low?
This sale includes demo units we've used for customer demonstrations since 2016, new-old-stock from discontinued product lines, display models from trade shows, and carefully curated inventory we've collected over nearly a decade. Most items include original packaging where available.
What types of items are included in the relocation sale?
Our relocation sale includes demo units we've used for customer demonstrations, new old stock from discontinued product lines, and display models from trade shows. All items are genuine products from top car audio brands - we're simply clearing inventory we can't take to our new location. Items range from amplifiers and speakers to processors and accessories accumulated over nearly 10 years at this location.
Do sale items come with manufacturer warranties?
Warranty coverage varies by item and condition. New old stock items typically include full manufacturer warranty if still valid. Demo and display items may have limited or no manufacturer warranty remaining. We clearly state warranty status in each product description. All sales are final on relocation sale items.
How does shipping work for relocation sale items?
We ship relocation sale items using the same careful packaging methods as our regular inventory. Shipping costs are calculated at checkout based on size and weight. For multiple item purchases, we'll combine shipping where possible to save you money. Large items like subwoofer boxes may require freight shipping with additional costs.
Can I return or exchange relocation sale items?
All relocation sale items are sold as-is with no returns or exchanges. We encourage local pickup customers to inspect items before purchasing. For shipped items, we provide detailed descriptions and photos. Since we're relocating, we cannot accommodate returns or warranty service after the sale period ends.