| Specification | Value |
|---|---|
| Active or Passive | Passive |
| System Type | Subwoofer |
| Configuration | Bass-reflex |
| System Continuous Power | 2000 W |
| System Programme Power | 4000 W |
| System Peak Power | 8000 W |
| Max SPL @ 1m | 148 dB (Half Space) |
| Freq Response (+/-3 dB) | 30 Hz - 800 Hz |
| Freq Range (-10 dB) | 25 Hz - 800 Hz |
| Bi-amp Mode Switch | No |
| Bluetooth | No |
| IP Certification | None |
| Driver Brand | Wharfedale Pro |
| LF Driver Size | 2 x 18" |
| LF Magnet Material | Ferrite |
| LF Frame Material | Aluminium |
| LF Voice Coil Size | 4" |
| LF Rated Impedance | 2 x 8 Ω |
| LF Power (RE:AES2-2012) | 2 x 1000 W |
| Preset Library | Yes |
| Input Connector | 3 x speakON NL4 (speakON compatible) (2 rear, 1 front) |
| Enclosure Material | Birch Plywood |
| Grille Material and Finish | Steel |
| Finish | Black Tough-Tone |
| Handles | 4 |
| Deployment | Ground |
| Pole Mount | None |
| Brackets Included | Yes |
| Rigging | No |
| Sensitivity 2.83 V / 1 m | 109 dB |
| System Rated Impedance | 4 Ω |
| Crossover Frequency | Preset Dependent |
| Recommended HPF = BW 18 dB/OCT. | 25 Hz |
| Included Accessory | User Manual |
| Unpacked - Front Height (mm) | 560 |
| Unpacked - Rear Height (mm) | 560 |
| Unpacked - Width Front (mm) | 1065 |
| Unpacked - Width Rear (mm) | 1065 |
| Unpacked - Depth (mm) | 756 |
| Packed - Height (mm) | 655 |
| Packed - Width Front (mm) | 840 |
| Packed - Width Rear (mm) | 840 |
| Packed - Depth (mm) | 1150 |
| Weight - Nett (kg) | 75 |
| Weight - Gross (kg) | 89 |
WLA-218BX
Dual 18″ subwoofer with Inverted Stack Gradient Array (iSGA) configuration
WLA-218BX
Dual 18″ subwoofer with Inverted Stack Gradient Array (iSGA) configuration
WLA-218BX is a dual 18″ subwoofer designed for precision low-frequency control and immense output. Using the same high-efficiency LF drivers as our acclaimed REASON-X Series, it delivers extreme bass with exceptional focus — where it matters most.
Each 18″ driver features a 4.0″ voice coil, double-layer spider bonding, and a reinforced 112 g membrane for superior power handling and reliability. Built from 18 mm birch plywood, the enclosure produces up to 148 dB max SPL @ 1 m, handling 2000 W AES (8000 W peak) at 4 Ω.
The WLA-218BX can be deployed in an Inverted Stack Gradient Array (iSGA) configuration, enabling cardioid functionality that directs low frequencies toward the audience — not behind the stage. This ensures cleaner, more efficient bass projection and reduced onstage rumble.
Built for high-impact touring and fixed installations alike, the WLA-218BX sets a new standard for controlled, musical low-end reinforcement in professional sound systems.
View the Series
OVERVIEW
| Specification | WLA-218BX |
|---|---|
| Catch Line | Dual 18″ subwoofer with Inverted Stack Gradient Array (iSGA) configuration |
| Active or Passive | Passive |
| System Type | Subwoofer |
| Configuration | Bass-reflex |
| System Continuous Power | 2000 W |
| System Programme Power | 4000 W |
| System Peak Power | 8000 W |
| Max SPL @ 1m | 148 dB |
| Freq Response (+/-3 dB) | 30 Hz - 800 Hz |
| Freq Range (-10 dB) | 25 Hz - 800 Hz |
| Driver Brand | Wharfedale Pro |
| LF Driver Size | 2 x 18" |
| LF Magnet Material | Ferrite |
| LF Frame Material | Aluminium |
| LF Voice Coil Size | 4" |
| LF Rated Impedance | 2 x 8 Ω |
| LF Power (RE:AES2-2012) | 2 x 1000 W |
| Preset Library | Yes |
| Input Connector | 3 x speakON NL4 (speakON compatible) (2 rear, 1 front) |
| Enclosure Material | Birch Plywood |
| Grille Material and Finish | Steel |
| Finish | Black Tough-Tone |
| Handles | 4 |
| Deployment | Ground |
| Brackets Included | Yes |
| Sensitivity 2.83 V / 1 m | 109 dB |
| System Rated Impedance | 4 Ω |
| Crossover Frequency | Preset Dependent |
| Recommended HPF = BW 18 dB/OCT. | 25 Hz |
| Included Accessory | User Manual |
| Unpacked - Front Height (mm) | 560 |
| Unpacked - Rear Height (mm) | 560 |
| Unpacked - Width Front (mm) | 1065 |
| Unpacked - Width Rear (mm) | 1065 |
| Unpacked - Depth (mm) | 756 |
| Packed - Height (mm) | 655 |
| Packed - Width Front (mm) | 840 |
| Packed - Width Rear (mm) | 840 |
| Packed - Depth (mm) | 1150 |
| Weight - Nett (kg) | 75 |
| Weight - Gross (kg) | 89 |
