Martin Audio WPL Manuel utilisateur

User Guide

WPL

Optimised Line Array

WPL USER GUIDE V1.0

WPL USER GUIDE

Contents

Introduction

Wavefront Precision Longbow 3

About this Manual 3

Ampliﬁcation, DSP and Networking 3

Important Safety Instructions 4

Caution 4

Unpacking the Units 4

System Overview

Wavefront Precision Longbow 5

Mechanical Design 5

Acoustic Design 5

Acessories

SXH218 Subwoofer 6

iK42 Ampliﬁer 6

DISPLAY 2.3

Overview 7

VU-NET 2.2

Overview 11

Rigging WPL

Overview 15

WPL Connections 16

WPLGRIDt Touring Flying Frame 17

Transport Cart for WPL 18

Ground-stack Bar and Outriggers 19

Inclinometer Assembly 20

Flown Systems 23

Rigging WPL with WPLGRIDt 26

Landing the Array 47

Ground-stack Deployment 55

Specications

WPL Speciﬁcations 63

WPL USER GUIDE V1.0

WPL USER GUIDE

Introduction

Wavefront Precision Longbow

Drawing on the research and technology behind MLA® Series, the Wavefront Precision Series is a new generation of multipurpose line

arrays designed to bring Martin Audio’s legendary sound, coverage consistency and control to a broader range of touring applications,

installations and budgets.

Wavefront Precision line arrays are designed as complete systems with external iKON® multi-channel ampliﬁers and optimized by

automated DISPLAY™ software.

Adopting the principle of scalable resolution, with external, dedicated multi-channel ampliﬁers, Wavefront Precision line arrays are uniquely

ﬂexible, upgradeable and ﬁnancially accessible.

With exceptional line array performance guaranteed by the acoustic design itself, scalable resolution unlocks the full potential of a

Wavefront Precision array and provides an adaptable pathway into the world of advanced optimisation.

The greater the resolution of the array in terms of individually driven enclosures, the more precisely DISPLAY can ﬁne-tune audience

coverage and hold the frequency response and SPLs throughout the venue within a tight window speciﬁed by the user.

For the ﬁrst time in the marketplace the decision on the level of resolution and control that is right for the install, client, event or budget

is yours.

About this Manual

This manual explains in detail the individual components that comprise a complete WPL system. System wiring and rigging is explained

and the two key software packages are covered. It is not however the intention for this manual to be the sole tutorial medium for those

wishing to use the system. Extensive training media is available via the Martin Audio website and training webinars are held on a regular

basis in order to help you gain a full understanding of the systems and their operation.

Amplication, DSP and Networking

Wavefront Precision line arrays are designed as complete systems with dedicated, high performance iKON multi-channel Class D ampliﬁers.

WPL USER GUIDE V1.0

WPL USER GUIDE

Important Safety Instructions

Please read these instructions and retrain for future reference. Heed all warnings and follow all instructions.

• No naked ﬂame sources such as lighted candles should be placed on the apparatus.

• Do not block any ventilation openings.

• Install in accordance with the Martin Audio instructions.

• Do not install near any heat sources such as radiators, heat registers, stoves or other such apparatus that produce heat.

• Do not defeat the safety purpose of the grounding-type plug. A grounding plug has two blades and a third grounding prong. The third

prong is provided for your safety. If the provided plug does not ﬁt your outlet consult an electrician for replacement of the obsolete

outlet.

• Protect the power cable from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit

from the apparatus.

• This equipment must be earthed.

• Only use attachments / accessories speciﬁed by Martin Audio.

• Use only with wheelboard and rigging hardware speciﬁed by Martin Audio. When moving using supplied wheelboards, caution should

be used to avoid injury from the cabinet tipping over.

• Unplug this apparatus during lightning storms or when unused for long periods of time.

• No user serviceable parts inside. Refer servicing to qualiﬁed service personnel. Servicing is required when the apparatus has been

damaged in any way such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus,

the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

• Do not remove covers.

Caution

To reduce the risk of electric shock do not remove any covers. There are no user serviceable parts inside the units. Refer servicing to

qualiﬁed service personnel only. Call Martin Audio Ltd on +44 (0) 1494 535312 or e-mail [email protected] for service.

Unpacking the Units

After unpacking the unit, please check it carefully for any damage. If any is found, immediately notify the carrier concerned – you, the

consignee, must instigate any claim. Please retain all packaging in case you need to return the unit.

Please consider the environment. When the product has reached the end of its useful life, please dispose of it responsibly through a

recycling centre.

WPL USER GUIDE V1.0

WPL USER GUIDE

System Overview

Wavefront Precision Longbow

WPL is a three-way, bi-amp, large format line array element consisting of two 12” neodymium magnet low frequency drivers in a Hybrid®

conﬁguration, two 6.5” neodymium magnet mid frequency drivers, and four 1” neodymium magnet high frequency compression drivers

loaded by constant directivity waveguides. In conjunction with automated DISPLAY system design and VU-NET network control software

applications, WPL features scalable resolution for advanced array control, resulting in outstanding levels of consistent, high quality audio

that can be distributed to every point throughout the audience in a venue.

WPL is a new breed of large-format optimised line array which brings innovative acoustic design, ultra-high performance and coverage

consistency to a wider range of users, applications and budgets than previously possible. A three-way, bi-amp system, it features horn-

loaded low-frequency, mid and HF sections to raise efﬁciency and increase output. Its high efﬁciency acoustic design can equal or

outperform larger, direct radiator systems — a 12-box array will throw beyond 80 metres (200ft) and deliver impressive rock levels to a

8,000-seat venue, saving on truck space and weight.

Mechanical Design

WPL is designed mechanically to be an easy to handle, quick to rig, safe, rugged and stable touring loudspeaker. The cabinet is constructed

predominantly from high grade multi-laminate birch and poplar plywood, with an integral 3-point rigging system. Two side pocket handles

and two rear grip handles make handling safe and easy, and the cabinet is ﬁnished in black textured paint with a fabric-backed protective

steel grille.

Acoustic Design

The WPL’s low frequency section consists of 2 x 12” (300mm) neodymium drivers in a Hybrid conﬁguration which marries the beneﬁts of

horn and reﬂex loading. Each driver is slot-loaded into a short horn to give a high sensitivity of 103dB @ 1m/2.83V, while the rear of the

driver is reﬂex-loaded to extend the LF output. The punch and low-frequency extension produced from such a small enclosure volume are

remarkable.

Mid and HF horns are physically separate — a key factor in the WPL’s exemplary 90° horizontal constant directivity dispersion pattern. The

midrange horn design utilises 2 x 6.5” (165mm) neodymium drivers to produce a high SPL of 134dB @ 1m/2.83V, while the HF section

employs 3 x 1” (25mm) exit neodymium compression drivers which feed three individual horns. Use of multiple small HF drivers instead

of a more traditionally-used large format compression driver results in less distortion and a more extended HF response.

WPL USER GUIDE V1.0

WPL USER GUIDE

Acessories

SXH218 Subwoofer

The SXH218 is an extremely powerful subwoofer capable of producing 148dB peak output at 1m. It is the ideal partner for Wavefront

Precision WPL arrays where maximum low frequency output is required. It features dual long excursion 18” (460mm) /4.5” (115mm)

voice coil neodymium driver with a water-resistant cone and triple roll surround in a Hybrid enclosure which couples the high efﬁciency of

a horn loaded system with the sub frequency extension of reﬂex loading.

The enclosure is constructed from multi-laminate plywood and coated with hard-wearing textured black polyurea. A rigid perforated steel

grille protects the front of the enclosure, while interlocking skids protect the top and bottom surfaces and prevent movement when stacked.

iK42 Amplier

The iKON iK42 is an advanced 4-channel controller ampliﬁer which combines very high-power density with superb audio performance,

state-of-the-art DSP and network control for WPL systems.

The iK42 can deliver a full 5000 watts per channel into 2 ohms with all channels driven while remaining highly efﬁcient. Its high efﬁciency

reduces the energy drawn from the mains supply and ensures the power reserves needed to deliver superb sound under arduous live

conditions.

Ethernet is used for system remote control and monitoring via Martin Audio’s VU-NET software application, while a user-friendly front

panel interface allows full local control of all features. Dante digital audio network inputs are also provided for digital audio distribution

and control.

Powerful DSP is fully integrated into the iK42 to provide a multitude of features that ensure maximum performance and worldwide

compatibility. It also provides up to 1000 FIR ﬁlter taps @ 48kHz on each output channel, which is essential to implement DISPLAY’s

wide bandwidth optimisation process in WPL line array systems. The iK42 employs comprehensive protection functions to maintain

safe operating conditions of both the ampliﬁer and the loudspeakers driven — including a sophisticated loudspeaker limiter suite which

incorporates peak, RMS and excursion limiting, as well as multiband limiting for passive 2-way systems.

WPL USER GUIDE V1.0

WPL USER GUIDE

DISPLAY 2.3

Overview

DISPLAY 2.3 is a unique software application for Wavefront Precision systems which calculates both inter-cabinet splay angles and the

DSP parameters for optimum system performance in any given space. Unlike competitors’ systems which generally use a basic geometric

calculation to aim their arrays, DISPLAY uses an extremely accurate computer model of the array to analyse the system performance in

a drawing of the venue. This allows DISPLAY to precisely calculate the parameters for the system to get exactly the coverage you have

speciﬁed. As a system designer you determine exactly how you would like the system to perform in the space; the SPL contour from the

front to the back of your audience region, how much spill into non-audience areas is acceptable and even specify designated Hard Avoid®

areas that the system will actively process to reduce spill to a minimum - great for producing a quiet stage or for reducing off-site noise

pollution at outdoor events.

The application is very straightforward to use taking you through a series of steps in a logical order. In fact, it won’t allow you to attempt

to design a system in the wrong order; steps need to be completed one after the other in the correct order making it very straightforward to

design an array that will perform to its maximum potential.

DISPLAY opens with a dashboard at the top of the screen the initial view prompting you to specify your array which is the ﬁrst step of the

design process. WPL, WPC or WPM are available along with the Multicellular family of products. You next specify how your array will be

deployed – ﬂown, or ground stacked – specify the number of cabinets and give the array a name.

The dashboard changes to show the tabs from left and right in the order in which the design will be completed.

First a 2D slice of the venue is created, the coverage within the venue is speciﬁed and the splay angles calculated. A rigging report allows

you to deploy the array and whilst that is being done the EQ coefﬁcients are calculated. Finally, an SPL report gives detailed information

showing exactly how the system will perform. The computer model is accurate to within +/- 1dB of actual measured results, meaning the

SPL tab is a reliable overview of how well your system design will cover the space.

WPL USER GUIDE V1.0

WPL USER GUIDE

The 2D slice is either drawn from scratch or you can also import a shell drawing from a previous project if you are working in a venue you

have visited previously. The slice is a side view of the venue. It is drawn anticlockwise starting at the back of the stage and clicking to

deﬁne the position of vertices that deﬁne all of the planes within the venue. This doesn’t have to be done accurately as you can reﬁne the

precise position of the points working from architects’ drawings or measurements you have taken yourself. The array is positioned and the

audience region speciﬁed from start to ﬁnish.

The coverage tab shows your 2D model with the planes reﬁned into three types; audience in green, non-audience in red and hard avoid

in blue. Each dot represents a virtual microphone position at which the software will take response measurements using the integral

computer model. The dots in the critical audience region are closer together for greater accuracy and are spaced closer together at the

start of the audience region to mirror how each region is covered by sections of the array. The audience offset can be edited – standing,

sitting or a custom offset – and each region can be edited, perhaps changing a section under a balcony from audience to non-audience for

example. The SPL proﬁle can be modiﬁed and the environmental conditions entered to allow optimisation to compensate for air absorption,

particularly critical for outdoor events.

WPL USER GUIDE V1.0

WPL USER GUIDE

In the splay tab you can reﬁne the quantity and position of the array before the system optimises the inter-cabinet splay angles and the

“aim” angle for the ﬂying grid.

Once this is complete you can further reﬁne how the array is to be deployed in the ‘Rig’ tab; choosing for example between a 2-point hang

and a single point for which the application will display the best position on the ﬂying frame to give the nearest angle to the optimised

aim. The actual physical angle that the speciﬁed hole in the frame will give will be displayed, with the option to use this angle in the

optimisation so that the array EQ is optimised for the actual physical position in which the array is installed.

Finally, the load on each ﬂying point is shown and critically the ‘Rig’ tab shows if the array is safe and meets both BGVC1 and DIN18800

standards.

With the physical deployment underway you can progress to optimise the EQ. Again, you can enter the environmental conditions and can

balance the three goals of response in your audience region, leakage to non-audience and the Hard Avoid performance. By default, each

are given equal importance but if your application demands particular emphasis on any one of these parameters, they can be given greater

importance.

WPL USER GUIDE V1.0

WPL USER GUIDE

The resolution is entered as 1 or 2 box for WPL.

The SPL tab shows the system performance. The entire venue SPL is displayed on an index plot with frequency along the horizontal axis

and position within the venue along the vertical. SPL is indicated with colour, blue being quietest moving through the colour spectrum to

red which is the loudest. You can move the cursor around the index plot and the position is shown on the 2D slice of the venue top left

whilst showing the frequency response at that position on the graph on the right.

The ﬁnal stage is to export your design. You can produce a printable rigging report, a wire-frame 3D model of the array, export 3D data for

use with EASE and most importantly export the project as a D2P ﬁle which can be uploaded directly to an iKON ampliﬁer for powering

Wavefront Precision systems.

DISPLAY 2.3 can be downloaded from the Martin Audio website: www.martin-audio.com/support/software. There is also a comprehensive

user guide to take you through the design process in detail. We strongly recommend downloading the user guide to fully understand the

application.

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