Wharfedale Pro SIGMA Series Guide

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SIGMA Series
SIGMA-8 SIGMA-10 SIGMA-12 SIGMA-15 SIGMA-18B SIGMA-V4 SIGMA-V8
PROFESSIONAL SOUND SYSTEMS
OPERATING MANUAL AND USER GUIDE

TABLE OF CONTENTS
IMPORTANT WARNINGS & SAFETY INSTRUCTIONS....................................................................................... 1
SIGMA SERIES INTRODUCTION ........................................................................................................................ 2
KEY FEATURES .................................................................................................................................................... 2
INSTALLATION.................................................................................................................................................... 2
CONNECTIONS / WIRING .................................................................................................................................. 3
RIGGING / SUSPENDING ................................................................................................................................... 4
DIMENSIONAL DRAWINGS................................................................................................................................ 5
SPECIFICATIONS ................................................................................................................................................. 8
WARRANTY.......................................................................................................................................................... 9

1
IMPORTANT WARNINGS & SAFETY INSTRUCTIONS
• READ ALL INSTRUCTIONS - Become familiar with the features and functions of these products before operating
them.
• COMPLY WITH ALL WARNINGS - All warnings and instructions for this product should be adhered to.
• 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.
• CABLES - Do not use shielded or microphone cable for connection between amplifiers and speakers. Use only
approved speaker cables with proper connectors.
• RIGGING, SUSPENDING, AND MOUNTING - Suspending and mounting of these speaker systems can expose
members of the public to serious health risks and even death.
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.
• CAUTION - These professional loudspeaker systems are capable of generating very high sound pressure levels.
Use care with placement and operation to avoid exposure to exposure to excessive volume levels. Permanent
hearing damage can result when operated to extreme levels.
• 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.

2
Wharfedale Pro SIGMA Series are extreme power handling, ultra hardwearing loudspeakers in an affordable
package built for a multitude of live sound applications. Our latest developments in loudspeaker technology
harness dual voice coil woofers reaching depths of 35Hz. These proprietary LF drivers are paired with 1.75”
Titanium Tweeters which throw high end to your crowd, while crossover points and acoustic charactaristics are
tuned by our experienced engineers for sonic accuracy. The cabinets adapt to multiple formations – M8 rigging
points, dual angle speaker poles and carry handles meet the varying demands of fixed installation and touring with
our Rhino Rock finish and steel grilles providing protection for a lifetime of use.
INTRODUCTION
Very High SPL Output Capability
High Sensitivity & Dynamic Range
Custom 90 x 60 HF Waveguides
Custom High Output, Low Distortion Woofers
Custom Compression Drivers
Dual layer Voice Coils (Quad layer on SIGMA 18B)
Proprietary Rhino Rock Painted Enclosure
HF Protection Circuitry
Parallel Wired speakon Inputs
Dual Angle Pole Mount Receptacles (Excludes SIGMA 8)
KEY FEATURES
Before attempting to install a SIGMA Series Loudspeaker system please refer to the important warnings and safety
instructions. Only qualified personnel should install a loudspeaker system.
Improper installation of a loudspeaker system can cause serious harm and even death if correct procedure is not
followed. Anyone attempting installation assumes all liability arising from such use.
Speakers with dual angle pole mount sockets (SIGMA 10 / 12 / 15) have an sockets that angles the cabinet down by
10°.This allows more sound to be aimed directly at the audience and less at the ceiling, reducing early reflections.
Please ensure that the correct socket is used for each speaker.
INSTALLATION

3
Connecting the SIGMA Series to your system is easy. The input panel includes parallel Speakon connectors. Run
your speaker wires from your amplifier to the speaker - you can use either input connector. Use the correct gauge
of stranded insulated speaker cable according to the power handling ability of your SIGMA Series cabinet. It is
always advisable to use heavier gauge (lower number) cables on longer runs. Be sure to connect your speakers in
proper polarity (what many refer to erroneously, as phase).This means that in normal operation, connect one end
of the same wire to the + or Red terminal on the amplifier and the other end to the +1 on the NL4 Connector. The
other wire is connected to the-1 pin on the NL4 CONNECTOR. Be sure to use high quality, low gauge (thick) speaker
wire and NOT shielded cable.
CONNECTIONS/WIRING
The SIGMA Series loudspeakers feature parallel wire inputs. Either input can be used for a simple system and 2
speakers can be parallel wired using a standard speaker cable. When Parallel wiring loudspeakers always take in
consideration the load you are putting on your amplifier. 2 parallel wired SIGMA loudspeakers will produce a 4
ohm load.
SIGMA SERIES CONNECTION PANELS
To avoid any possible damage to your amp and speakers, be sure to check the owner’s manual of your power
amplifier to confirm it is capable of operating at 2 ohms. The SIGMA 18B has a High Pass output. The high pass
allows you to connect a full range SIGMA loudspeaker and subwoofer to one amplifier channel with 4 ohm load
IMPORTANT NOTE
SIGMA-15 SIGMA-18B
SIGMA-8/10/12/15 Rear Pannel SIGMA-18B Rear Pannel
POWER HANDLING:
350 Watts Continuous
700 Watts Program
1400 Watts Peak
Impedance: 8 Ohms POWER HANDLING:
500 Watts Continuous
1000 Watts Program
2000 Watts Peak
Impedance: 4 Ohms

4
All full range SIGMA enclosures (except SIGMA-18B) include multiple M8 rigging points for fast, safe and secure
suspension.
Using Shoulder Eyebolts
Always apply the load to the bolt along the plane of the eye. For long term installation use a thread-locking
compound. Do not attempt to bend or otherwise deform any rigging hardware.
Please refer to the important safety warnings before you consider suspending any loudspeakers.
Each primary load bearing suspension point shall be rated for the total load.
(A minimum 5:1 Design Factor)
RIGGING/SUSPENDING

5
DIMENSIONAL DRAWINGS
SIGMA-8
SIGMA-10

6
DIMENSIONAL DRAWINGS
SIGMA-12
SIGMA-15

7
DIMENSIONAL DRAWINGS
SIGMA-18B

8
DIMENSIONAL DRAWINGS
SIGMA-V4
SIGMA-V8

9
SPECIFICATIONS
Model Name SIGMA-8 SIGMA-10
System Type Passive Passive
Configuration Two-way Two-way
Frequency Response (+/-3 dB) 70 Hz - 18 kHz 65 Hz - 18 kHz
Frequency Range (- 10 dB) 65 Hz - 20 kHz 60 Hz - 20 kHz
Sensitivity (2.83 v / 1 m) 96 dB 97 dB
Calculated Maximum SPL @1 m 124 dB 126 dB
System Rated Impedance 8 Ω 8 Ω
Low Frequency Transducer
Size (mm / inches) 203 mm / 8'' 254 mm / 10''
Voice Coil Size (mm / inches) 38 mm / 1.5'' 38 mm / 1.5''
Rated Impedance 8 Ω 8 Ω
LF Power (re:AES2-2012) 150 W 200 W
High Frequency Transducer
HF Driver Type Compression Driver Compression Driver
Coil Size (mm / inches) 25 mm / 1'' 44 mm / 1.75''
Exit Size (mm / inches) 1" 1"
Diaphragm Material Polymer Titanium
Rated Impedance 8 Ω 8 Ω
HF Power (re:AES2-2012) 25 W 40 W
Nominal Coverage (H x V) 90° x 60° 90° x 60°
Power
System Continuous Power 150 W 200 W
System Programme Power 300 W 400 W
System Peak Power 600 W 800 W
Crossover frequency 2.8 kHz 2.4 kHz
Input Connector 2 x NL4 (speakON compatible) 2 x NL4 (speakON compatible)
Hardware: 35 mm pole socket
M8 x 5
1 Handle on back
Dual-angle(0° or 10°) 35 mm pole socket
M8 x 5
1 Handle on back
Enclosure
Enclosure Material 12 mm MDF 15 mm MDF
Finish Black Paint / White Paint Black Paint / White Paint
Grille Material & Finish 1.2 mm steel, painted 1.2 mm steel, painted
Dimensions - Unpacked
Height 430 mm / 17" 500 mm / 19.5"
Width Front 272 mm / 11" 383 mm / 13.3"
Width Rear 158 mm / 6" 213 mm / 8.4"
Depth 277 mm / 13.5" 339 mm / 13.3"
Dimensions - Packed
Height 505 mm / 20" 585 mm / 23"
Width Front 363 mm / 14.25" 451 mm / 18"
Width Rear 196 mm / 7.71" 254 mm / 10"
Depth 322 mm / 12.75" 384 mm / 13.3"
Net Weight 7.8 kg / 17 lbs 15.4 kg / 34 lbs
Gross Weight 8.8 kg / 19 lbs 17.8 kg / 38.5 lbs

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Model Name SIGMA-12 SIGMA-15
System Type Passive Passive
Configuration Two-way Two-way
Frequency Response (+/-3 dB) 60 Hz - 18 kHz 50 Hz - 18 kHz
Frequency Range (- 10 dB) 55 Hz - 20 kHz 45 Hz - 20 kHz
Sensitivity (2.83 v / 1 m) 98 dB 98 dB
Calculated Maximum SPL @1 m 129 dB 129 dB
System Rated Impedance 8 Ω 8 Ω
Low Frequency Transducer
Size (mm / inches) 305 mm / 12'' 381 mm / 15''
Voice Coil Size (mm / inches) 64 mm / 2.5'' 64 mm / 2.5''
Rated Impedance 8 Ω 8 Ω
LF Power (re:AES2-2012) 300 W 350 W
High Frequency Transducer
HF Driver Type Compression Driver Compression Driver
Coil Size (mm / inches) 44 mm / 1.75'' 44 mm / 1.75''
Exit Size (mm / inches) 1" 1"
Diaphragm Material Titanium Titanium
Rated Impedance 8 Ω 8 Ω
HF Power (re:AES2-2012) 40 W 40 W
Nominal Coverage (H x V) 90° x 60° 90° x 60°
Power
System Continuous Power 300 W 350 W
System Programme Power 600 W 700 W
System Peak Power 1200 W 1400 W
Crossover frequency 2.2 kHz 2.2 kHz
Input Connector 2 x NL4 (speakON compatible) 2 x NL4 (speakON compatible)
Hardware: Dual-angle (0° or 10°) 35 mm pole socket
M8 x 5
2 Handles on side
Dual-angle (0° or 10°) 35 mm pole socket
M8 x 5
2 Handles on side
Enclosure
Enclosure Material 15 mm MDF 15 mm MDF
Finish Black Paint / White Paint Black Paint / White Paint
Grille Material & Finish 1.2 mm steel, painted 1.2 mm steel, painted
Dimensions - Unpacked
Height 537 mm / 21" 635 mm / 25"
Width Front 354 mm / 14" 435 mm / 17"
Width Rear 218 mm / 8" 261 mm / 11.7"
Depth 359 mm / 14" 439 mm / 17.25"
Dimensions - Packed
Height 625 mm / 24.6" 720 mm / 28.35"
Width Front 468 mm / 18.4" 553 mm / 21.75"
Width Rear 260 mm / 10.2" 303 mm / 12"
Depth 404 mm / 15.9" 488 mm / 19.2"
Net Weight 18.2 kg / 40 lbs 23.4 kg / 51.5 lbs
Gross Weight 20.9 kg / 45 lbs 26.7 kg / 58.7 lbs
SPECIFICATIONS

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SPECIFICATIONS
Model Name SIGMA-18B SIGMA-V4 SIGMA-V8
System Type Passive Passive Passive
Configuration subwoofer Full Range Full Range
Frequency Response (+/-3 dB) 35 Hz-250 HZ 160 Hz - 17 KHz 130 Hz - 17 KHz
Frequency Range (- 10 dB) 30 Hz-250 HZ 150 Hz - 20 KHz 120 Hz - 20 KHz
Sensitivity (2.83 v / 1 m) 100 dB 95 dB 97 dB
Calculated Maximum SPL @1 m 133 dB 123 dB 128 dB
System Rated Impedance 4 Ω 8 Ω 8 Ω
Low Frequency Transducer
Size (mm / inches) 457 mm / 18'' 4 x 75 mm / 3" 8 x 75 mm / 3"
Voice Coil Size (mm / inches) 64 mm / 2.5'' 33 mm / 1.3" 33 mm / 1.3"
Rated Impedance 4 Ω 8 Ω 4 Ω
LF Power (re:AES2-2012) 500 W 40 W 40 W
High Frequency Transducer
HF Driver Type
Coil Size (mm / inches)
Exit Size (mm / inches)
Diaphragm Material
Rated Impedance
HF Power (re:AES2-2012)
Nominal Coverage (H x V)
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na
na 160° x 40° 160° x 30°
Power
System Continuous Power 500 W 150 W 300 W
System Programme Power 1000 W 300 W 600 W
System Peak Power 2000 W 600 W 1200 W
na naCrossover frequency 150 Hz
Input Connector 2 x NL4 (speakON
compatible)
1 x NL4 (speakON
compatible)
1 x NL4 (speakON
compatible)
Hi Pass output connector 1 x NL4 (speakON
compatible)
Hardware: 35 mm pole socket
4 Handles on sides Bracket Bracket
Enclosure
Enclosure Material 18 mm MDF 12 mm MDF 12 mm MDF
Finish Black Paint / White Paint Black Paint / White Paint Black Paint / White Paint
Grille Material & Finish 1.2 mm steel, painted 1.2 mm steel, painted 1.2 mm steel, painted
Dimensions - Unpacked
Height 554 mm / 21.25" 445 mm / 17.5" 805 mm / 31.7"
Width Front 502 mm / 20" 116 mm / 4.6" 116 mm / 4.6"
Width Rear 502 mm / 20" 85 mm / 3.3" 85 mm / 3.3"
Depth 780 mm / 30.8" 115 mm / 4.5" 115 mm / 4.5"
Dimensions - Packed
Height 649 mm / 25.5" 520 mm / 20.5" 880 mm / 34.5"
Width Front 588 mm / 22.75" 220 mm / 8.7" 220 mm / 8.7"
Width Rear 588 mm / 22.75" 220 mm / 8.7" 220 mm / 8.7"
Depth 865 mm / 34" 220 mm / 8.7" 220 mm / 8.7"
Net Weight 39.1 kg / 86 lbs 3 kg / / 6.6 lbs 5.6 kg / 12.32 lbs
Gross Weight 46.4 kg / 102 lbs 3.6 kg / 8 lbs 6.6 kg / 14.2 lbs

12
SPECIFICATIONS: ENGINEERING NOTE
All Wharfedale Pro loudspeaker measurements are carried out fairly, and in-line with industry standards to ensure
users can select the right product for their application, and understand exactly how it performs. Please see the
below details on how our speakers are measured and how the information is presented.
• Sensitivity
Calculated from the effective frequency range, as the sound pressure level produced at 1 m on the reference
axis by an applied voltage of 2.83v. Note: it is important to consider Rated Impedance when reviewing sensitivity
measured with 2.83v input. Sensitivity ratings of 1w/m were replaced by the more appropriate 2.83v/m in
AES2-2012. For more information refer to AES standard AES2-2012.
• Calculated Maximum SPL @1m
Max SPL is defined as the peak acoustic output calculated by 10*Log (Peak Power) + Sensitivity. Example: 10* Log
(800)+96 = 125dB.
• Power
Power, expressed in units of watts is defined by the equation v2/Z where v=voltage input and Z=Rated Impedance.
Example: 492/8=300 watts. Using band limited pink noise, the voltage average is measured with a true RMS meter.
Band limited signal Crest Factor is typically 12dB, meaning that peaks deliver 4 x the v, or 16 x the power of the
average input level.
Note: Loudspeaker power rating is a complex topic. WP endeavors to demystify power ratings by explaining
procedures. The AES2-2012 standard for loudspeaker drivers in section 6 describes power handling. Be aware
that the AES power handling ratings are for an accelerated two-hour test designed as a repeatable test to define
a benchmark to compare loudspeaker drivers. The AES2-2012 section 6 definition is in no way intended to define
long term operating power levels, nor is it appropriate for systems.
• Continuous Power
The average dynamic power capacity over the device's recommended bandwidth that may be sustained
continuously. WP test with band limited pink noise applied for a minimum of eight hours.
• Program Power
Program power is a useful rating to guide the choice of amplifier power that may safely be coupled to the system.
Common sense must be considered dependent on the source signal."
• Peak Power
The capacity to withstand short peaks, typically less than 10ms, delivered by dynamic peaks of audio signals, within
the recommended bandwidth."

13
Wharfedale Pro products are warranted of manufacturing or material defects for a period
of one year from the original date of purchase. In the event of malfunction, contact your
authorized Wharfedale Pro dealer or distributor for information.
*Be aware that warranty details may differ from country to country. Contact your dealer or
distributor for information. These terms do not infringe your statutory rights.
WHARFEDALE PRO LIMITED WARRANTY

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 © 2021 Wharfedale Pro. Wharfedale Pro is a member of the IAG Group.