WHARFEDALE PRO Sigma Series 500 Watts RMS 18" Passive Subwoofer

SIGMA-18B

Wharfedale Pro

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SIGMA 18B

500 watts
AES (Continuous)
  • 18″ subwoofer
  • 2.5″ voice coil
  • 133 dB Max SPL @ 1 meter
  • 1000 watts Programme
  • 2000 watts Peak

BLACK OR WHITE

Sigma series are covered in our durable Rhino Rock paint finish.  Make your choice – Black or white!  Both look great and last a lifetime.

Wharfedale Pro introduces the SIGMA SERIES of passive loudspeakers – specifically engineered for fixed installations.

With their unobtrusive design, the new SIGMA SERIES is perfect for installations where audio quality, rigging options and discreet cosmetics are critical. The series initially consists of 4 two-way models (8, 10, 12 and 15”) and an 18” subwoofer. All models are available in both black or white finishes.

Each model of SIGMA features the latest proprietary Wharfedale Pro driver technology. Using a curvilinear, double-roll surround system for the LF driver, Wharfedale Pro engineers have ensured stability for low through to mid-range frequencies. Meanwhile the HF compression driver features a 44mm diaphragm using a solid aluminium rear plate which assists heat dissipation in demanding environments.

Constructed from up to 18mm of MDF, the height and overall size of the cabinet has been reduced thanks to a newlydeveloped angled-corner port system. These ports have been individually tuned to maximise low end punch.

“We previewed the SIGMA series to our Distributors during ProLight and Sound and received very positive reactions.” said Wharfedale Pro. “Our Engineers had researched the market and listened to many installers requests. The result is SIGMA which offers the installer an MDF alternative in a category and at a price point which historically has been forced towards plastics.”


  • Discreet and unobtrusive design
  • Newly developed angled corner port system to reduce dimensions
  • Multiple M8 rigging points and a two way pole mount for easy installation
  • Crossovers tailored for vocal intelligibility
  • Chip resistant Rhino Rock paint
  • Double roll surround LF driver 
  • High performance HF driver with aluminium rear cover for maximum heat dissipation
  • 2.5” voice coils on 12”, 15” and 18B models
  • 7 SIGMA series models available in black or white in the range for maximum flexibility. 

  • Model Name SIGMA-18B
    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 na
    Coil Size (mm / inches) na
    Exit Size (mm / inches) na
    Diaphragm Material na
    Rated Impedance na
    HF Power re:AES2-2012 na
    Nominal Coverage (H x V) na
    Power  
    System Continuous Power 500 w
    System Programme Power 1000 w
    System Peak Power 2000 w
    Crossover frequency 150 Hz
    Input Connector 2 x NL4 (speakON compatible)
    Hi Pass output connector 1 x NL4 (speakON compatible)
    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