SKU: 31665338645

Wharfedale SIGMA-X18B Passive Subwoofer (Black) - 18"

Sale price$564.30 Regular price$627.00
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Ships within 48 hours · Estimated delivery Aug 28 - Sep 2

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Description

Wharfedale SIGMA-X18B Passive Subwoofer (Black) - 18"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

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. 

EASY INSTALL

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.

EASY CONNECTION

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.

ROTATABLE WAVEGUIDES

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

90° x 60° or 60° x 90°….you decide.

Specifications

System Type

Passive

Configuration

Subwoofer

Frequency Response (+/-3 dB)

35 Hz – 250 Hz

Frequency Range (-10 dB)

30 Hz – 250 Hz

Sensitivity 2.83 V / 1 m

100 dB

Calculated Maximum SPL @1 m

133 dB

System Rated Impedance

4 Ω

Low Frequency Transducer


Size (mm / inches)

457 mm / 18”

Voice Coil Size (mm / inches)

64 mm / 2.5”

Rated Impedance

4 Ω

LF Power re:AES2-2012

500 W

High Frequency Transducer


HF Driver Type

n/a

Coil Size (mm / inches)

n/a

Exit Size (mm / inches)

n/a

Diaphragm Material

n/a

Rated Impedance

n/a

HF Power re:AES2-2012

n/a

Waveguide Type


Nominal Coverage (H x V)

na

LF Driver

1 x 18″

HF Driver

n/a

Power


System Continuous Power

500 W

System Programme Power

1000 W

System Peak Power

2000 W

Crossover frequency

150 Hz

Input Connector

2 x speakON / 1x Barrier Strip

Hardware

35 mm pole socket




4 handles on sides

Enclosure


Enclosure Material

18 mm MDF

Finish

Black Paint / White Paint

Grille Material & Finish

1.2 mm steel, painted

Dimensions – Unpacked


Height

554 mm / 21.25″

Width Front

502 mm / 20″

Width Rear

502 mm / 20″

Depth

780 mm / 30.8″

Dimensions – Packed


Height

649 mm / 25.5″

Width Front

588 mm / 22.75″

Width Rear

588 mm / 22.75″

Depth

865 mm / 34″

Weight


Net Weight

39.1 kg / 86 lbs

Gross Weight

46.4 kg / 102 lbs

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31665338645

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Travis
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★★★★★ 5
Awesome. Kid loves them
Size: 4T-5T, Unit Count: 99
Great. i love how i don't have to rip them. there is Velcro on the sides to pull off. and they fit great
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Reviewed in the United States on April 22, 2026
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Lexington, US
★★★★★ 5
Our Go-To Pull-Ups for Potty Training
Size: 2T-3T, Unit Count: 124
We’ve tried a few different brands during potty training, and we always come back to Pull-Ups. They fit my daughter really well, are easy for her to pull up and down on her own, and hold up great overnight without leaking. The sides tear easily for quick changes, which is super helpful when you’re out and about. The designs are also cute and helped make potty training a little more exciting for my toddler. Definitely a staple in our house during this stage!
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Reviewed in the United States on May 12, 2026
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Draper, US
★★★★★ 5
Luvs pulls up are the best
Size: 5T-6T, Unit Count: 48
I love this brand. It’s very secure, and the adjustable band makes it easy to tighten without taking off my child’s pants. It doesn’t leave an odor, the texture is smooth, and my child is always comfortable. The price matches the quality, and there’s no leakage or spillover. Overall, it’s very durable. Make sure to have it correctly fastened because the Velcro can leave scratches on child skin.
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Reviewed in the United States on December 9, 2025
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Fort Morgan, US
★★★★★ 4
Toddler approved
Size: 4T-5T, Unit Count: 99
Fits true to size and easy to pull up and down by my toddler. Very absorbent - perhaps a little too absorbent as it's taking my daughter forever to be potty trained and she's content in her soiled training pants... Great quality overall.
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Reviewed in the United States on August 29, 2025
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Marie33kl
Birmingham, US
★★★★★ 5
They prevent leaks, and fit great!
We have always used Huggies diapers for our babies and young toddlers because they were the only ones that never leaked or caused a rash. My second daughter was fully potty trained at 2.5 years old and never needed pull-ups. However, our third daughter, who also trained at 2.5 years old, digressed with her nighttime potty training due to instability - we moved twice within the first 6 weeks after she potty trained. So we had to get pull-ups for her to wear at night. Obviously since we loved Huggies diapers, we tried Huggies Pull-Ups, and again, they did not disappoint! They never leak, even on nights when she doesn't get up to go at all, and has lots of pee, and they have never caused a rash either, no matter how full. She's been using them for 1.5 years, at night, and we have never had any issues. They are dependable: decently comfortable to the child, do not cause rashes, fit properly with the ability to adjust at the thigh (if needed), and they prevent leaks! I highly recommend them!
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