Essential Information About the Wharfedale Delta X218B Passive Subwoofer
- Dual 18-inch high excursion drivers for massive bass reserve and a maximum SPL of 138 dB.
- Flexible wiring: 4-ohm parallel mode or discrete 2 x 8-ohm mode via NL4 connectors.
- Touring construction with "Rhino Rock" coating, 1.5 mm steel grille, and 4 integrated handles.
- 100 dB sensitivity (2.83 V/1 m) and response starting at 30 Hz for live sound, DJ, and installation use.
Heir to the Delta Series, Redesigned for the Road
Derived from the Delta lineage, the Delta X218B builds on a proven architecture by adding optimized components and a redesigned crossover for increased power handling and reliability. This dual 18-inch model stands as the heavy subwoofer solution in the range, designed for contractors and demanding stages.
For Whom and Which Venues?
Designed for contractors, clubs, live stages, and DJs, the Delta X218B excels when dense and controlled bass is required. Used alone to reinforce a compact system, or stacked (coupling two or four cabinets per side) for more ambitious shows, it delivers impact and foundation without sacrificing mix clarity.
Key Features and Acoustic Advantages
High-Efficiency Dual 18-Inch Drivers
Its two 18-inch drivers with 4-inch voice coils deliver considerable energy while maintaining a smooth response. The 100 dB sensitivity facilitates use with a wide range of modern amplifiers.
Flexible Wiring, Ready for Your Amplifiers
The NL4 terminal allows two modes: parallel for a 4-ohm load (powered by a single powerful channel), or discrete for two 8-ohm loads (separate powering of each speaker). This flexibility simplifies integration into existing amplification racks.
Tour-Ready Construction
Its 18 mm cabinet features a highly durable "Rhino Rock" textured coating resistant to shocks and scratches. The 1.5 mm steel grille effectively protects the drivers, while the four side handles facilitate road handling.
Technical Specifications
System
- Type: Passive subwoofer
- Frequency response (+/- 3 dB): 30 Hz - 1.5 kHz
- Frequency response (-10 dB): 30 Hz - 1.5 kHz
- Sensitivity (2.83 V / 1 m): 100 dB
- Maximum SPL @1 m: 138 dB
- Nominal system impedance: 4 ohms (Parallel) / 8 ohms (Discrete)
Drivers
- Woofers: 2 x 18 inches
- Voice coils: 4 inches
- Driver impedance: 2 x 8 ohms
- LF power (AES2-2012 reference): 2 x 800 W
Power and Amplification
- RMS power: 1600 W (Parallel) / 800 W (Discrete)
- Program power: 3200 W (Parallel) / 1600 W (Discrete)
- Peak power: 6400 W (Parallel) / 3200 W (Discrete)
Connectivity
- Inputs: 2 x NL4 (speakON compatible)
Enclosure
- Handles: 4 handles (two on each side)
- Material: 18 mm MDF
- Finish: black "Rhino Rock"
- Protective grille: 1.5 mm steel
Dimensions
- Height: 541 mm
- Width - front: 1041 mm
- Width - rear: 1041 mm
- Depth: 650 mm
Weight
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