Hertz HMX 6.5 S-LD-G 6.5" RGB Marine Coaxial Speakers, 75W RMS, 4Ω, Gray, Pair

Hertz HMX 6.5 S-LD-G is a 6.5-inch two-way marine coaxial speaker set designed for boat and powersports audio systems that need durable full-range output, integrated RGB LED lighting, and sport-style gray grilles. This version uses the S-LD-G part number, identifying the Sport grille, LED-equipped, Gray configuration.

The HMX 6.5 S-LD-G is engineered for open-water use with marine-grade materials, IP65 certification, UV-resistant components, and corrosion-resistant terminals. It is optimized for infinite-baffle marine installations and combines a polypropylene woofer with UV inhibitors, a Santoprene surround, and a 1.4-inch PEI dome tweeter for strong output and reliable long-term performance.

Key Performance Features

• 6.5-inch 2-way marine coaxial speakers with integrated RGB LED lighting
• Gray sport grilles for sporty marine and powersports installations
• 75 watts RMS continuous power handling
• 150 watts peak power handling
• IP65 marine certification for water and environmental resistance
• Optimized for infinite-baffle installation
• Polypropylene woofer cone with UV inhibitors and co-molded Santoprene surround
• PEI dome tweeter with acoustic lens for improved off-axis dispersion
• Sealed built-in crossover with resettable solid-state tweeter protection
• Gold-plated corrosion-resistant terminals

System Architecture

• Type: 2-way marine coaxial speakers
• Application: Marine and powersports full-range speaker systems
• Nominal Impedance: 4 Ω
• System Role: Full-range coaxial speaker for open-air marine environments
• Active vs Passive: Passive coaxial design with integrated crossover
• Lighting: Integrated RGB LED illumination

Power Handling / Output

• Continuous (RMS): 75 W
• Peak: 150 W
• Sensitivity: 89 dB
• Frequency Response: 50 Hz – 25 kHz

Driver / Construction

• 165 mm (6.5") polypropylene woofer cone with UV inhibitors
• Co-molded Santoprene surround
• 25 mm (1") woofer voice coil
• 36 mm (1.4") PEI dome tweeter
• 20 mm (0.8") tweeter voice coil
• High-density flux ferrite woofer magnet
• Neodymium tweeter magnet
• Aramid fiber spider with silicone-insulated lead wires
• Marine-grade polymer basket
• ASA plastic gray sport grilles

Installation Use Cases

• Boat audio systems needing durable 6.5-inch full-range speakers
• Marine and powersports installations with exposed speaker locations
• Infinite-baffle mounting in panels, bulkheads, and marine speaker positions
• Systems where integrated RGB lighting and gray sport styling are required
• Daily-use marine systems needing strong off-axis response and corrosion resistance

Technical Specifications

• Brand: Hertz
• Series: HMX
• Model: HMX 6.5 S-LD-G
• Product Type: 2-Way Marine Coaxial Speakers with RGB LEDs
• Grille Style/Color: Sport Gray
• Size: 165 mm (6.5")
• Impedance: 4 Ω
• Power Handling (RMS): 75 W
• Power Handling (Peak): 150 W
• Sensitivity: 89 dB
• Frequency Response: 50 Hz – 25 kHz
• Woofer Voice Coil Diameter: 25 mm (1")
• Tweeter Diaphragm: 36 mm (1.4")
• Tweeter Voice Coil Diameter: 20 mm (0.8")
• Woofer Magnet Size: 78.5 x 32 x 17 mm (3.09 x 1.26 x 0.67")
• Tweeter Magnet Size: 19.7 x 3 mm (0.78 x 0.12")
• Mounting Depth: 95.6 mm (3.76")
• Overall Diameter: 172.2 mm (6.78")
• Cutout Diameter: 128 mm (5.04")
• Tweeter Protrusion: 26.6 mm (1.05")
• Mounting Depth to Grille/Base Dimension: 69 mm (2.72")
• Weight (Each Speaker): 1 kg (2.2 lb)
• Free-Air Resonance (Fs): 65 Hz
• DC Resistance (Re): 3.5 Ω
• Inductance (Le): 0.53 mH
• Vas: 8.8 l
• Mms: 14 g
• Cms: 0.4 mm/N
• BL: 5.2 T•m
• Qts: 0.7
• Qes: 0.75
• Qms: 11.5
• Xmax: 3.65 mm
• Xmech: ±6.65 mm (0.26")
• Certification: IP65, UV resistant, salt-fog resistant

Identifiers & Packaging

• Manufacturer Part Number (MPN): HMX 6.5 S-LD-G
• UPC: 8018823139304
• Sold As: Pair (2 speakers)
• Quantity: 2 speakers

Why Buy From MCOR Automotive

• Authorized retailer for the brands we sell
• Marine and 12V system integration experience
• Accurate product data and expert support for speaker selection, amplifier matching, and clean marine audio system setup

Fitment, Installation & Warranty Notes

• Fitment Help: Need help confirming fitment, compatibility, amplifier matching, or installation parts? Use our Fit Guide or contact us through the chat button before ordering.
• Authorized Retailer: MCOR Automotive is an authorized Hertz retailer. Products purchased from MCOR include applicable manufacturer warranty coverage when installed and used according to manufacturer guidelines.