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.”
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 |