• Re-designed dual 8” Passive line array
  • Re-defined HF compression driver
  • Improved HF protection circuit
  • Bi-amp and Passive mode switching


  • 15” high powered subwoofer
  • 700 Watts AES (RMS) / 1400 Watts PRG / 2800 Watts Peak
  • 35 Hz – 1.3 KHz Frequency Response
  • 133 dB Max SPL


  • Dual 15” high powered subwoofer
  • 1200 Watts AES (RMS) / 2400 Watts PRG / 4800 Watts Peak
  • 39 Hz – 1.5 KHz Frequency Response
  • 145 dB Max SPL



The original WLA-28 has become a favourite around the world. Dual 8” drivers, extreme SPL capabilities and an impressive price to performance ratio has meant that WLA-28 can be found on stage, on tour and in fixed installations.

The newly updated WLA-28X now takes that power and performance to a new level. With an improved HF compression driver, new flat grille design and improved HF protection circuitry, the WLA-28X is ready to impress.

The new custom designed HF compression driver now delivers more control and more definition to the HF content.

The flat grille face also makes life easier for rental companies and improves long-term durability.


400 watts

Re-designed dual 8” Passive line array

Re-defined HF compression driver

Improved HF protection circuit

Bi-amp and Passive mode switching

System AES LF: 400 W HF: 90 W

System Programme LF: 800 W HF: 180 W

System Peak Power LF: 1600 W HF: 360 W

15 mm / 18 mm Birch Plywood construction 


700 watts
  • Single 15″ LF driver with 4.0″ voice coil
  • 133 dB Max SPL
  • 15 mm / 18 mm Birch plywood construction
  • Integral rigging system
  • 700 watts AES (RMS)
  • 1400 watts Programme
  • 2800 watts Peak
  • 8 Ω impedance


1200 watts
  • Dual 15″ LF drivers with 4.0″ voice coils
  • 145 dB Max SPL
  • 15 mm / 18 mm Birch plywood construction
  • Integral rigging system
  • 1200 watts AES (RMS)
  • 2400 watts Programme
  • 4800 watts Peak
  • 4 Ω impedance

About the clarity

The new neo HF compression driver delivers additional clarity and performance with enhanced definition.

It is custom made by Wharfedale Pro and is coupled to a 100° x 10° waveguide.

Dual 8"

At the heart of the WLA-28X are 2 x 8″ custom Wharfedale Pro LF drivers.

These feature 2.0″ voice coils to ensure high efficiency and high power handling.

These custom designed transducers are what give a WLA-28X system its incredible sound and power handling capacity.


Arrays can be assembled using only WLA-28X line array elements or with WLA-15B / WLA-28SUB Subwoofers at the top of the array.

The WLA-28X Common Fly frame supports up to 450 kg.  Thats 12 x WLA-28X elements and a WLA-28SUB.

Compare WLA-28X to the original wla-28

New – WLA-28X response graphs show clearer high frequency definition

Original WLA-28 response graphs

WLA-28X also has a new HF protection circuit

Original WLA-28 circuit

Just imagine

Imagine your dream system!  You can configure a WLA series rig to suit your needs!

To help your design and system preparations, you can download some recommended system diagrams.  These range from small to large and use a selection of our different amplifier ranges. 

Optimised Ground Stacking

WLA-28X rigging doubles up as an optimised ground stacking system, using the WLA-15B or WLA-28SUB subwoofer as a base.

Arrays of WLA-28X line array elements can be aimed downwards by as much as 10° to cover audience areas close to a stage, as well as upward by as much as 10° in order to better cover distant balcony seating areas. 

"Wheely" useful

With the WLA-28 Dolly Frame, manoeuvrability is now an added feature.

The steel frame acts both as a common fly frame for flying situations AND as a dolly for ground stacking.

3 outriggers add stability to a ground stack allowing up to a maximum of 1 x WLA-28SUB plus 4 x WLA-28X’s to be configured.  Adding extra versatility to any WLA-28X system

Bi-amp & passive

In BI-AMP mode, two power amplifiers can be used. This gives you the advantage of being able to select the best power amplifier specifications for each driver inside the loudspeaker. In a BI-AMP configuration, an external crossover is used to separate the frequencies and this splits the signal to the dedicated LF amplifier and the HF amplifier. This way, each amplifier is only working on the given frequency range and, in turn, is powering the corresponding driver inside the loudspeaker.

In PASSIVE mode, a single amplifier can be used to power all drivers inside the loudspeaker. The full frequency range is put into the loudspeaker and the loudspeakers’ internal crossover separates the frequencies, delivering the right frequencies to the right driver. In the example of a 2-way passive loudspeaker, this means that the single amplifier is powering both the HF compression driver and the LF transducer. The internal crossover takes care of both the frequency and power separation.


A Versadrive DSP (such as SC-48 FIR) or a DP-N or DP-F 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, power and clarity that this system can deliver.




Model NameWLA-28X
System Type2 x 8” Two-way
Frequency Response (+/-3 dB)65 Hz-20 KHz
Sensitivity (2.83 v / 1 m)101 dB
Calculated Maximum SPL @1 m133 dB
Nominal Coverage (H x V)100°x10°
Continuous / Programme / Peak
Passive: 400 W / 800 W / 1600 W
Bi-amp LF: 400 W / 800 W / 1600 W
Bi-amp HF: 90 W / 180 W / 360 W
Rated Impedance ( Ω )Passive: 16 Ω
Bi-amp LF: 16 Ω ; Bi-amp HF: 16 Ω
HF Diaphragm MaterialTitanium
HF Magnet MaterialNdFeB
LF Magnet MaterialFerrite
LF Frame MaterialAluminium
HF Coil Size (inches/mm)3.0” (75 mm)
LF Coil Size (inches/mm)2.0” (51.6 mm)
Crossover Frequency1.7 KHz
Cabinet TypeTrapezoid
Enclosure Material and finish18 mm / 15 mm Plywood
Enclosure ColourBlack paint
Grille Material & Finish1.5 mm Steel
ConnectorsNeutrik NL4MP
HardwareIntegral side plate adjustable
rigging 0°-10°
Cabinet Dimensions HxWxD(mm)250 x 760 x 463.2 mm
Packed Dimensions HxWxD(mm)320 x 830 x 534 mm
Net Weight (Kg)29.5 Kg
Gross Weight (Kg)32.0 Kg

Model NameWLA-15BWLA-28SUB
System TypePassivePassive
Configuration15″ Subwoofer2 x 15″ subwoofer
Frequency Response (+/-3 dB)40 Hz – 1.5 KHz39 Hz-900 Hz
Frequency Range (-10 dB)35 Hz – 1.3 KHz39 Hz-1.5 KHz
Sensitivity (2.83 v / 1 meter)99 dB108 dB
Calculated Maximum SPL @ 1 meter133 dB145 dB
System Rated Impedance8 Ω4 Ω
Low Frequency Transducer
Size381 mm / 15″2 x 381 mm / 15”
Voice Coil Size 101.6 mm / 4″100 mm / 4”
Rated Impedance8 Ω2 x 8 Ω
LF Power (re:AES2-2012)700 W2 x 600 W
System Continuous Power700 W1200 W
System Programme Power1400 W2400 W
System Peak Power2800 W4800 W
Crossover frequencyNoNo
Input Connector2 x speakON compatible2 x speakON compatible
HardwareIntegral side plate
non adjustable 
Integral side plate
non adjustable 
Enclosure Material15 mm Plywood15 mm,18 mm Plywood
FinishRhino Black PaintRhino Black Paint
Grille Material & Finish1.2 mm Black Steel1.2 mm Black Steel
Dimensions – (Unpacked)
Height Front485 mm / 19.09″485 mm / 19.1″
Height Rear485 mm / 19.09″485 mm / 19.1″
Width760 mm / 29.92”760 mm / 29.9”
Depth440 mm / 17.32”716 mm / 28.2”
Dimensions – (Packed)
Height545 mm / 21.46″850 mm / 33.5″
Width Front580 mm / 22.83″575 mm / 22.6″
Width Rear580 mm / 22.83″575 mm / 22.6″
Depth860 mm / 33.86″806 mm / 31.7″
Net Weight (kg / lbs)38.5 kg / 84.88 lbs61.2 kg / 134.6 lbs
Gross Weight (kg / lbs)46.5 kg / 102.51 lbs66.0 kg / 145.2 lbs