Wharfedale Pro User Manual

WLA-218BX
Dual 18” Subwoofer

www.wharfedalepro.com

TABLE OF CONTENTSWARNINGS ………………………………………………………………………………….1
PRODUCT FEATURES ……………………………………………………………………2
CONNECTIONS ….…………………………………………………………………………3
DIMENSIONAL DRAWINGS……………………..…..…..…..…..….………………………4SPECIFICATIONS ……………………..………………………….…………………………5

IMPORTANT WARNINGS & SAFETY INSTRUCTIONS
Read these instructions
Follow these instructions
Keep these instructions for future reference
Heed all warnings
Do not use this system near moisture or water
Clean only with a dry cloth
Install in accordance with these Wharfedale Pro operating instructions
Follow the manufacturer’s operating instructions for all peripheral devices such as ampliﬁers and processors
Do not install near heat sources such as radiators, heat registers, stoves or any other apparatus that produces
heat (for example lighting systems and ampliﬁers)
Use only accessories speciﬁed or supplied by Wharfedale Pro
Do not use shielded microphone/instrument cables to connect ampliﬁers and speakers, use only approved
speaker cables with proper connectors
Use caution with placement and operation of this speaker system, permanent hearing damage can be caused
by prolonged exposure to excessive sound pressure levels
Refer all servicing to qualiﬁed professionals. Servicing is required when the loudspeaker has been damaged inany way, such as impact damage, liquid ingress or foreign object damage. In addition, the loudspeaker should bereferred to qualiﬁed service personnel if there is any kind of malfunction.

Rigging, suspending and mounting should only be attempted by experience quali ed professionals.
Incorrect usage can result in damage to equipment and property, injury and even death. Under nocircumstances should you attempt to rig, suspend or mount these speakers unless you are fully
quali ed and certi ed to do so by relevant local, state and national authorities. If you are notproperly quali ed or do not know of pertinent regulations consult quali ed personnel for advice.
Consult a structural engineer before suspending a speaker system and ensure that the total weightof your system can be held by the truss or mounting surface.

Inspect all mounting hardware before rigging, suspending or mounting. If there is any damage or
distortion to any mounting hardware do not proceed until any damaged hardware is repaired orreplaced.

UNPACKINGAll Wharfedale Pro products are fully checked before leaving our factory. After unpacking pleaseinspect the cabinets for any physical damage Please retain the shipping carton if possible andinternal packing material incase the unit ever needs to be returned. Please check as soon as possiblethat the unit is functioning. In the event of any damage please contact your dealer immediately sothat a written claim for damage can be made.

1

PRODUCT FEATURES
Low frequencies usually go everywhere. Alot 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.
A front grille speakON compatible connector means that the Gradient Array can easily be built with othersubwoofers. Working together, the phase will combine resulting in more directional low-end frequencies
which focus on the audience, rather than backstage.
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.
WLA-218BX - There’s no going back!

Features•Front speakON for Inverted Stack Gradient Array conﬁguration•4.0” voice coils using acclaimed Reason-X LF drivers•

2000 watts AES (RMS)•4000 watts Programme•

8000 watts Peak•

18 mm Plywood construction•A powerful sub with cardioid functionality

2

CONNECTIONSPIN 1+
PIN 1PIN 2+
PIN 2-LF Positive
LF Negative
Not connected
Not connected

Inverted Stack Gradient Array
Audience

2 X WLA-218BX≥1 miSGA conﬁguration
Low freq focus
A minimum distance of 1 m or more ismandatory from any surface(e.g. Stage, Wall)

3stageDIMENSIONAL DRAWINGS

Optional casters are available from your Wharfedale Pro distributor or from 3rd parties online.
The measurements are 100 mm / 4" swivel caster.

4

SPECIFICATIONS
Model Name

WLA-218BX

System Type
PassiveConﬁguration
Dual 18" SubwooferFrequency Response (+/-3 dB)
30-800 Hz
Frequency Range (-10 dB)
25-800 Hz
Sensitivity 2.83 V / 1 Meter
109 dB
Calculated Maximum SPL @1 Meter
148 dB
System Rated Impedance4Ω
Low Frequency TransducerSize
2 x 470 mm / 18”
Voice Coil Size
102 mm / 4.0''
FerriteLF Magnet Material
Aluminium
LF Frame Material
2x8Ω
Rated Impedance2 x 1000 WLF Power re:AES2-20124Ω
Nominal ImpedancePower2000 watts
System AES (RMS) Power
4000 watts
System Programme Power
8000 watts
System Peak Power
Crossover Frequency
3 x speakON NL4 (speakON compatible) (2 rear, 1 front)
Input Connectors
No
Rigging
No
Pole Mount
4 on Sides
Handles
Enclosure
Rectangle
Cabinet Type18 mm plywood
Enclosure Material and ﬁnish
black paintColour Options
steel
Grille Material & Finish
Dimensions - Unpacked (mm / inches):
560 mm / 22.0"
Height1065 mm / 41.9"
Width Front
1065 mm / 41.9"
Width Rear
756 mm / 29.8"Depth
Dimensions - Packed (mm / inches):
638 mm / 25.1"
Height1138 mm / 44.8"
Width Front
1138 mm / 44.8"
Width Rear
829 mm / 32.6"
Depth
Weight75.0 kg / 165 lbs
Net Weight
87.7 kg / 192.9 lbs
Gross Weight5

Wharfedale Pro products are warranted of manufacturing or material defects for a period of
three years from the original date of purchase. In the event of malfunction, contact yourauthorised Wharfedale Pro dealer or distributor for information.
Please be aware that the warranty details may diﬀer from country to country. Contact your dealer or distributor for
information (available at www.wharfedalepro.com). These terms do not infringe your statutory rights.

WHARFEDALE PROFESSIONAL
IAG House, 13/14 Glebe Road, Huntingdon, Cambridgeshire, PE29 7DL, UK
www.wharfedalepro.com
Wharfedale Professional reserves the right to alter or improve speciﬁcations without notice.
All rights reserved © 2023 Wharfedale Pro. Wharfedale Pro is a member of the IAG Group.

April 2023