Wharfedale Pro SIGMA-X18B Passive Subwoofer 18-Inches

Equipped with a custom Wharfedale Pro 18″ LF driver featuring a 2.5″ voice coil, SIGMA-X18B delivers powerful bass extension with precision and reliability. It handles 500 W AES (1000 W programme / 2000 W peak) and achieves up to 133 dB max SPL @ 1 m, making it a strong low-end foundation when paired with SIGMA-X full-range models.

Constructed from 18 mm MDF with a durable Tough-Tone paint finish, SIGMA-X18B is built for long-term installation use. A 35 mm pole socket allows for easy deployment with top-mounted SIGMA-X speakers, while 4 integrated handles support convenient transport and positioning.

Connectivity is flexible thanks to both barrier strip and 4 pole speaker connectors, ensuring compatibility with a wide range of installation systems.

With powerful performance, practical installation options and a consistent design aesthetic, SIGMA-X18B is the ideal low-frequency companion for SIGMA-X system configuration.

EASY INSTALL

Newly designed cosmetics

• Rotatable HF waveguides
• Re-evaluated performance
• Updated column models with HF drivers
• Column models with mini EVO-Fold waveguides
• 70 V / 100 V Hi-Z Column models
• EASE gll files available for download
• Supported with system diagrams 
• Supported with downloadable FIR presets
• Easy fixings and brackets
• Available in black or white durable paint finishes

SIGMA-X18B

• 500 W AES (Continuous) Parallel
• 1000 W Programme – Parallel
• 2000 W Peak – Parallel
• 2.5” LF Voice coils
• 133 dB Max SPL @ 1 m

COLUMNS WITH MINI EVO-FOLD

SIGMA-XV models feature the highly refined mini EVO-Fold waveguide along with HF compression drivers.  For the SIGMA-XV5 there is one, while the SIGMA-XV9 features two compression drivers, each with a mini EVO-Fold waveguide.

This mini EVO-Fold design provides consistent dispersion coverage on both the horizontal and vertical planes with the sound radiating from one, singular and coherent, source. 

Installations can be complicated enough, so we have made SIGMA-X series as easy as possible.

For the SIGMA-XV Column array, either use the included U bracket, or for even more adjustment, use the optional WPB-SV which gives up to 15° tilt and 180° of rotation. 

SIGMA-X full range cabinet models all have 17 x M8 rigging points, PLUS 35 mm pole sockets. Fly or wall bracket! SIGMA-X8, X10, X12 and X15 can use the optional WPB-1 or WPB-2 wall brackets.

All SIGMA-X models (with the exception of the 70 V / 100 V T models) are equipped with both speakON compatible and barrier strip inputs.  It is another small step that makes the installation easy.

SIGMA-X8, SIGMA-X10, SIGMA-X12 AND SIGMA-X15 feature a rotatable waveguide.

90° x 60° or 60° x 90°….you decide.

• Active or Passive: Passive
• System Type: Subwoofer
• Configuration: Bass-reflex
• System Continuous Power: 500 W
• System Programme Power: 1000 W
• System Peak Power: 2000 W
• Max SPL @ 1m: 133 dB (Half Space)
• Freq Response (+/-3 dB): 35 Hz - 250 Hz
• Freq Range (-10 dB): 30 Hz - 250 Hz
• Bluetooth: No
• IP Certification: None
• Driver Brand: Wharfedale Pro
• LF Driver Size: 18"
• LF Voice Coil Size: 2.5"
• LF Rated Impedance: 4 Ω
• LF Power (RE:AES2-2012): 500 W
• Preset Library: Yes
• Input Connector: 2 x 4 Pole Speaker Connector, 1 x Barrier Strip
• Enclosure Material: MDF
• Grille Material and Finish: Steel Black or White
• Finish: Black or White Tough-Tone paint
• Handles: 4
• Deployment: Ground
• Pole Mount: 35 mm
• Brackets Included: No
• Rigging: No
• Sensitivity 2.83v / 1m: 100 dB
• System Rated Impedance: 4 Ω
• Crossover Frequency: 150 Hz
• Recommended HPF = BW 18 dB/OCT.: 30 Hz
• Transformer (T): No
• Included Accessory: Quick Start Guide

• Height 649mm / 25.55″
• Width Front 588mm /23.15″
• Width Rear 588mm / 23.15 "
• Depth 780mm / 30.71″

• Net Weight: 39.1 Kg / 86.20 lbs
• Gross Weight: 46.4 Kg / 102.29 lbs