WLA-218BX

 There's no going back !

Low frequencies usually go everywhere.....

A lot of output energy can end up in places where the audience do not benefit from it.   Having great low frequencies behind the stage is a waste of power and energy.

It’s for this reason the new WLA-218BX can be easily deployed in an Inverted Stack Gradient Array (iSGA) configuration.

WLA-218BX uses the acclaimed Reason-X 18” subwoofer drivers.  With 4.0” voice coils and an impedance boost around 35 Hz, these efficient drivers simply deliver extreme bass.  


And, when used in the iSGA configuration, they deliver that bass directly into the face of the audience.

Key Features

  • 2 x 18" LF drivers
  • 4.0" voice coils
  • Inverted Stack Gradient Array (iSGA) configuration
  • 18 mm Baltic Birch plywood construction
  • 148 dB Max SPL @ 1 meter
  • 2000 W AES (Continuous)
  • 4000 W Programme
  • 8000 W Peak
  • Impedance 8 Ohms
  • A powerful sub with cardioid functionality

  • 2 x 18" LF drivers
  • 4.0" voice coils
  • Inverted Stack Gradient Array (iSGA) configuration
  • 18 mm Baltic Birch plywood construction
  • 148 dB Max SPL @ 1 meter
  • 2000 W AES (Continuous)
  • 4000 W Programme
  • 8000 W Peak
  • Impedance 8 Ohms
  • A powerful sub with cardioid functionality

Up close
The Drivers
  • ∮102.6 diameter voice coil.  
Thats OVER 4.0" but we say 4.0" because of number rounding
  • Double-layer spider bonding.
Updated glue is used.  This bonding can eliminate brittle cracking and reduces harmonic distortion.
  • 112 g Membrane.
The WLA-218BX driver has a heavier membrane which can withstand more power without breaking. 
  • 31 mm voice coil cavity.
A larger internal cavity for the coil windings allows WLA-218BX to have lower response by 5 Hz.
  • 6.2 ohm impedance.
The impedance peak is higher in the Reason-X driver at 35 Hz.  This results in superior low end strength.


iSGA Configuration
When deployed in an Inverted Stack Gradient Array (iSGA) configuration, WLA-218BX really moves some air !


A front grille speakON compatible connector means that the Gradient Array can easily be built with other subwoofers.

Working together, the phase will combine resulting in more directional low-end frequencies which focus on the audience, rather than backstage.
Control the system
A Versadrive DSP (such as SC-48 FIR) or a DP-N series amplifier with internal FIR filtering is highly recommended to get the most from the system.

Phase, EQ and filtering should be applied and this way, the physics of the system can be truly optimised - delivering that sub-bass ……directly into the faces of the audience!
Measurements
SPECIFICATIONS
Model Name WLA-218BX
System Type Passive
Configuration Dual 18" Subwoofer
Frequency Response (+/-3 dB) 30-800 Hz
Frequency Range (-10 dB) 25-800 Hz
Sensitivity 2.83V/1M 109 dB
Calculated Maximum SPL @1 Meter 148 dB
System Rated Impedance 4 Ω
Low Frequency Transducer
Size 2 x 470 mm / 18"
Voice Coil Size 102 mm / 4.0"
LF Magnet Material Ferrite
LF Frame Material Aluminium
Rated Impedance 2 x 8 Ω
LF Power re:AES2-2012 2 x 1000 W
Nominal Impedance 4 Ω
Power
System AES (RMS) Power 2000 watts
System Programme Power 4000 watts
System Peak Power 8000 watts
Crossover Frequency
Input Connectors 3 x speakON NL4 (speakON compatible) (2 rear, 1 front)
Rigging No
Pole Mount No
Handles 4 on Sides
Enclosure
Cabinet Type Rectangle
Enclosure Material and finish 18 mm plywood
Colour Options black paint
Grille Material & Finish steel
Dimensions - Unpacked (mm / inches):
Height 560 mm / 22.0"
Width Front 1065 mm / 41.9"
Width Rear 1065 mm / 41.9"
Depth 756 mm / 29.8"
Dimensions - Packed (mm / inches):
Height 638 mm / 25.1"
Width Front 1138 mm / 44.8"
Width Rear 1138 mm / 44.8"
Depth 829 mm / 32.6"
Weight
Net Weight 75.0 kg / 165 lbs
Gross Weight 87.7 kg / 192.9 lbs
Products