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The SIGMA-18B is a passive bass-reflex subwoofer with one 18" driver and a 2.5" voice coil, rated at 500 W continuous and 2000 W peak into 4 Ω. Maximum SPL is 133 dB at 1 m in half space, with a 35 Hz to 250 Hz (+/-3 dB) response. The MDF cabinet has four handles, a 35 mm pole mount and 2 x NL4 inputs.
| 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 |
| Bi-amp Mode Switch | No |
| 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 | No |
| Input Connector | 2 x NL4 (speakON Compatible) |
| Enclosure Material | MDF |
| Grille Material and Finish | Steel |
| Finish | Black or White |
| Handles | 4 |
| Deployment | Ground |
| Pole Mount | 35 mm |
| Brackets Included | No |
| Rigging | Yes |
| Sensitivity 2.83 V / 1 m | 100 dB |
| System Rated Impedance | 4 Ω |
| Crossover Frequency | 150 Hz |
| Recommended HPF = BW 18 dB/OCT. | 30 Hz |
| Transformer (T) | No |
| Transformer Taps (70 V) | No |
| Transformer Taps (100 V) | No |
| Input Connectors (T) | No |
| Included Accessory | User Manual |
| Unpacked - Height (mm) | 554 |
|---|---|
| Unpacked - Width Front (mm) | 502 |
| Unpacked - Width Rear (mm) | 502 |
| Unpacked - Depth (mm) | 780 |
| Packed - Height (mm) | 649 |
| Packed - Width Front (mm) | 865 |
| Packed - Width Rear (mm) | 865 |
| Packed - Depth (mm) | 588 |
| Weight - Nett (kg) | 40.5 |
| Weight - Gross (kg) | 47.8 |
Yes. Rigging is listed as Yes, and brackets are listed as not included. The number of points is not given in the spec rows.
2 x NL4 (speakON compatible).
Black or white.
Tell us the brief and we’ll specify the system, confirm availability and
quote in AED or USD.
