Diamond Audio HXM8FBK 8" 2-Way High Output Marine Speakers (2Ω or 4Ω)
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Diamond Audio HXM8FBK 8" 2-Way High Output Marine Speakers (2Ω or 4Ω)
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$599.99
$599.99
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Diamond Audio HXM8FBK 8" 2-Way High Output Marine Speakers (2Ω or 4Ω)
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Diamond Audio HXM8FBK 8" High-Output Horn Coaxial Speakers — 2Ω or 4Ω
The Diamond Audio HXM8FBK Black Series 8-inch horn-loaded coaxial speakers are built for high-output motorcycle, marine, and powersports systems that need strong midrange projection, crisp high-frequency output, and weather-resistant construction.
Available in both 2-ohm and 4-ohm versions, the HXM8FBK combines a rigid carbon-fiber cone, oversized 1.5-inch titanium dome tweeter, neodymium motor structure, and reinforced composite basket for serious output in demanding open-air environments.
High Output Built for Open-Air Audio
Designed for motorcycles, boats, and powersports systems where projection, durability, and efficient output matter.
Diamond Audio HXM8FBK Key Specifications
| Series | HXM Black Series |
| Speaker Size | 8 inches |
| Speaker Type | Horn-Loaded 2-Way Coaxial |
| 2Ω Model | HXM8F2BK |
| 4Ω Model | HXM8F4BK |
| Power Handling | 175W RMS / 600W MAX |
| Sensitivity | 95 dB (1W/1M) |
| Voice Coil | 2-inch |
| Cone Material | Carbon Fiber |
| Tweeter | 1.5-inch Oversized Titanium Dome Tweeter |
| Motor | Neodymium |
| Basket | Fiberglass-Reinforced Polymer / Composite |
| Surround | Rubber |
| Xmax | 3.25 mm |
| Fs | 83 Hz |
| Mounting Depth | 3.11″ (78.9 mm) |
| Cutout Diameter | 7.02″ (178.38 mm) |
| Overall Diameter | 8.31″ (211 mm) |
| Overall Height | 3.56″ (90.32 mm) |
| Mounting Style | Flush Mount or Back Mount |
| Environmental Protection | Water spray resistant, salt-water resistant, UV stable |
Fitment warning: Verify mounting depth, cutout diameter, grille clearance, enclosure depth, and speaker impedance before ordering.
Rigid Carbon-Fiber Cone for Increased Output
The HXM8FBK Black Series uses a rigid carbon-fiber cone designed to improve output and low-frequency impact while maintaining control at higher playback levels.
Carbon fiber provides a strong, lightweight cone structure that is well suited to motorcycle and powersports systems where efficiency and projection are critical.
Oversized 1.5-Inch Titanium Tweeter
Diamond Audio pairs the 8-inch midrange cone with an oversized 1.5-inch titanium dome tweeter to increase high-frequency output and improve projection in open-air environments.
That additional high-frequency energy helps the speaker remain clear against wind, road, engine, and exhaust noise.
175W RMS High-Output Power Handling
Each HXM8FBK speaker is rated for 175 watts RMS and 600 watts maximum power. The available 2-ohm and 4-ohm versions allow the system designer to match amplifier loading and channel configuration more precisely.
2Ω — HXM8F2BK
The 2-ohm version can be used when the amplifier and system design benefit from a lower impedance load and increased available channel output.
4Ω — HXM8F4BK
The 4-ohm version offers additional flexibility for multi-speaker wiring, bridged amplifier configurations, and systems designed around higher-impedance loads.
Neodymium Motor and High-Excursion Suspension
The HXM8FBK uses a lightweight neodymium motor structure paired with Diamond Audio’s maximum-Xmax suspension design. The compact motor helps reduce weight and mounting depth while maintaining the magnetic strength required for high-output performance.
Diamond lists 3.25 mm of Xmax on the current 4-ohm technical specification, giving the 8-inch cone usable excursion for stronger midbass performance.
Built for Motorcycle, Marine and Powersports Environments
The Black Series is designed for exposed audio installations where conventional automotive speakers may not survive long-term use.
- Water-spray resistant construction.
- Salt-water resistant materials.
- 100% UV-stable components.
- High-temperature lightweight injection-molded construction.
- Fiberglass-reinforced composite basket.
- Rubber surround.
- Flush-mount or back-mount installation capability.
Motorcycle Audio System Applications
The HXM8FBK is a strong option for custom Harley-Davidson, Indian, Slingshot, powersports, and marine systems where an 8-inch coaxial speaker is needed for high-output full-range or midrange-heavy operation.
Common applications include custom fairing pods, lower pods, tour-pack enclosures, saddlebag installations, custom speaker panels, marine locations, and other fabricated 8-inch speaker positions.
Installation and Tuning Notes
- Choose the 2Ω or 4Ω version based on amplifier loading and complete system design.
- Verify the amplifier's RMS output at the selected speaker impedance.
- Confirm the 7.02-inch cutout and 3.11-inch mounting depth before fabrication.
- Check rear clearance for the motor structure and speaker terminals.
- Use appropriate crossover protection for the intended system and power level.
- Secure all mounting hardware for vibration-heavy motorcycle and powersports applications.
- Protect wiring and terminals from moisture, abrasion, heat, and moving components.
- Complete final EQ and crossover tuning after the full system is installed.
Diamond Audio HXM Black Series Manual
Review the current Diamond Audio HXM Black Series installation and specification manual before installation.
Need Help Choosing 2Ω or 4Ω?
Speaker impedance should be selected around the amplifier, number of speakers, channel configuration, wiring method, and overall system design — not simply by choosing the lowest impedance available.