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 Jul 19 - Jul 24

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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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Rose Ortega
Pawtucket, US
★★★★★ 5
Great shirt & my son loved it.
Size: X-Large, Color: Blue
bought it for my son and he loved it. In fact when I called him he was wearing the shirt said it fit him well, it looked great. It was comfortable. He loved the quality & the cut. The length was great and ask me where I got it so I sent him the link so he could buy more in other colors. He loves to golf and said this is a perfect shirt for that. Plus the price was right.
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Reviewed in the United States on January 9, 2026
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Nick K.
Bozeman, US
★★★★★ 5
sizing runs a bit big but very comfortable, i love these and ordered multiple colors
Size: X-Small, Color: Black
Initially, i ordered a small and an X small based on reviews here. Glad i did. I opened the x-small first and it fit perfectly. Returned the other one unopened. Sleeves fit my arms well. Collar stands up well. Shirt has sufficient length to tuck in too. Not super long though if you want to untuck with jeans. I'm 5'6 140#. I lift weights regularly and run. I'm right at 11.8-12.0% body fat. I typically wear a small in the amazon essentials slim fit t shirt. Those fit really well in size S. Check them out too if you have not yet. These polos XS fits equally well for my body type.
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Reviewed in the United States on March 27, 2026
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Clarice
Fort Morgan, US
★★★★★ 4
Great Shirt - Fits big and isn’t slim IMO
Size: X-Small, Color: Black, Size: X-Small, Color: Black
5’10, 155lbs, size X-Small. Soft material, very comfortable, light weight and breathable. Sizing is way off. This shirt is huge considering my size, shirt size, and slim fit.
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Reviewed in the United States on January 16, 2026
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moi
Charlottesville, US
★★★★★ 5
Lightweight and soft
Size: Large, Color: Bright Blue
True to size and very comfortable. Lightweight and the color is just as the picture. They was well and don’t wrinkle easily. We dry them on low heat to avoid shrinkage and so far they have been just fine.
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Reviewed in the United States on June 6, 2026
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Bakir
Los Angeles, US
★★★★★ 5
Great Slim-Fit Polo That Keeps You Cool on the Course
Size: Medium, Color: Dark Green, Size: Medium, Color: Dark Green
I picked up this Amazon Essentials Slim-Fit Golf Polo recently, and it’s quickly become one of my favorite golf shirts. The quick-dry fabric really works — even on hot, sunny days, I stay comfortable and dry without feeling sticky. The slim fit is flattering without being too tight, and there’s enough stretch to move freely during my swing. It’s lightweight but still feels durable, and the collar keeps its shape after multiple wears and washes. For the price, it’s hard to beat a polo that looks good, feels great, and performs well on the course. Definitely recommend if you want something simple and functional.
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Reviewed in the United States on June 12, 2025

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