Wharfedale Pro WLA-28X User manual
Wharfedale Pro User Manual
WLA-28X
www.wharfedalepro.com
IMPORTANT SAFETY INSTRUCTIONS
1
1. READ ALL INSTRUCTIONS - carefully and become familiar with the features and functions
of these products before operating them.
2. RETAIN THESE INSTRUCTIONS - for future reference.
3. COMPLY WITH ALL WARNINGS - All warnings and instructions for this product should be
adhered to.
3. RIGGING - SUSPENDING - MOUNTING - Rigging suspending or mounting of speaker systems
can expose members of the public to serious health risks and even death.
7. SERVICE - There are no user serviceable parts inside this product. Users should not attempt
to service this product. Warranty nullification could result if this is attempted.
6. CAUTION - Professional loudspeaker systems are capable of generating very high sound
pressure levels. Use care with placement and operation to avoid exposure to excessive
volume levels. Permanent hearing damage can result when operated to extreme levels.
5. CABLES - Do not use shielded or microphone cables for connection between amplifiers and
speakers. Use only approved speaker cables with proper connectors.
4. USE WITH AMPLIFIERS - In order to avoid damage to drivers and other equipment, it is
advisable to establish and follow a routine for powering up and powering down a sound
system. With all system components connected, turn on source equipment (mixers, signal
processors, record and playback units, etc.) BEFORE powering up amplifiers. Transient
voltages from powering up source equipment can damage speakers if amplifiers are already
turned on. Make sure that amplifier volumes are set to their minimum settings and power
up any system amplifiers LAST. It is recommended that all system components be allowed
to stabilize for several seconds before any source signals are introduced or level setting
adjustments are made. Similarly, when shutting systems down, turn all amplifiers off first,
before powering down any other system components.
UNDER NO CIRCUMSTANCES ATTEMPT TO RIG, SUSPEND OR OTHERWISE MOUNT THESE
SPEAKERS UNLESS YOU ARE FULLY QUALIFIED AND CERTIFIED TO DO SO BY RELEVANT LOCAL,
STATE AND NATIONAL AUTHORITIES. ALL RELEVANT SAFETY REGULATIONS MUST BE FOLLOWED.
IF YOU ARE NOT PROPERLY QUALIFIED OR DO NOT KNOW OF PERTINENT REGULATIONS,
CONSULT QUALIFIED PERSONNEL FOR ADVICE.
PRODUCT FEATURES
2
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.
Features
• Re-designed dual 8” Passive line array
• Re-defined HF compression driver
• Improved HF protection circuit
• Bi-amp and Passive mode switching
• System AES (Continuous) LF: 400 W HF: 90 W
• System Programme Power LF: 800 W HF: 180 W
• System Peak Power LF: 1600 W HF: 360 W
• 15 mm / 18 mm Birch Plywood construction
HF COMPRESSION DRIVER
The new neo HF compression driver delivers additional clarity and performance with enhanced
definition.
Frequency Impedance
SYSTEM IDEAS
3
SYSTEM IDEAS
4
SYSTEM IDEAS
5
SYSTEM IDEAS
6
BI-AMP MODE
For complete system versatility the WLA-28X can be
configured in either Bi-amp or Passive mode
PASSIVE
MODE
BI-AMP
MODE
SYSTEM TUNING
1. ARRAY SCALING
7
To get the most from any line array, it needs setting up correctly. Without tuning and refining, the
system will not deliver to its full potential.
The system not only needs to be tuned to the room or venue, but the individual elements of the
array need to be tuned to work perfectly in relation to each other. By following the 4 ‘Tuning Tips’
you can improve the overall performance of your line array.
As elements are combined, the lower frequencies are proportionally increased. Therefore, when
more elements are used, more LF reduction is needed.
2. RANGE EQ
Higher frequencies are reduced in energy by distance. This is as a result of air absorption. To
compensate for this energy loss over distance, Peaking or Bell filters should be used.
The amount of energy absorbed by air also changes as a result of humidity. So always think about
this constantly variable loss (or comparative gain) of HF energy.
2 to 4 elements 5 to 8 elements 8 elements or more
More HF EQ needed due to distance
Less HF EQ needed
due to distance
8
3. SHAPE EQ
The physical shape of the array has a profound impact on its sonic performance. These physical
considerations should be compensated for within the DSP EQ to ensure a smooth frequency
response.
4. SUB PLACEMENT
Having the subwoofers physically aligned in the
same plane as the array elements is the ideal
scenario. However, this is not always possible.
In situations where the subwoofers and the
array elements cannot be physically aligned, a
DSP delay should be used.
1 ms (milliseconds) delay for every 0.34 m
(@15° C) can get you an acceptable result.
It is highly recommended that further fine-tuning
should be done by using one of the many
industry standard measurement software
systems, reference microphones and soundcards.
Subs are behind array.
The array needs the delay.
Subs infront of the array.
The subs need the delay.
1 ms (milliseconds) delay
a) A at array using minimum splay angles between
the elements will naturally have a boost in the mid
b) A curved array will have a reduction in mid
LF
MF
HF
Physical coupling results in
boost in mid frequencies
LF
MF
HF
Reduced physical coupling results
in reduced mid frequencies
463.2
760.0
250.0
LINE DRAWINGS
9
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