Martin Audio Wavefront W8 Manual de usuario

Martin Audio – WAVEFRONT TOURING SERIES

CONTENTS (ENGLISH) Page No

1 INTRODUCTION 2

2 UNPACKING 2

3 OVERVIEW 2

3.1 W8 2

3.2 W8S 3

4 SAFETY FIRST 3

4.1 Stacking 3

4.2 Flying 3

5 AMPLIFICATION 4

6 CONNECTIONS 5

7 CABLE LENGTHS 5

8 SYSTEM CONFIGURATIONS 6

9 WARRANTY 7

10 TECHNICAL SPECIFICATIONS 8

MARTIN AUDIO

LONDON

The Martin Experience

CONTENTS

GUIDES

APPLICATIONS GUIDE

1 INTRODUCTION

Thank you for purchasing a Martin Audio Wavefront Touring system.

The W8 and W8S are highly efficient touring products suitable for a wide

variety of medium and large scale live sound applications.

2 UNPACKING

Each Martin Audio loudspeaker is built to the highest standard and

thoroughly inspected before it leaves the factory. After unpacking the

system, examine it carefully for any signs of transit damage and inform

your dealer if any such damage is found. It is suggested that you retain

the original packaging so that the system can be repacked at a future date

if necessary.

Please note that Martin Audio and its distributors cannot accept any

responsibility for damage to any returned product through the use of

non-approved packaging.

3 OVERVIEW

This guide covers the W8, a 3-way touring system capable of use down to

80Hz and the W8S HybridTM sub-bass.

3.1 W8

The W8 is a highly efficient 3-way touring sound enclosure which achieves

full-frequency performance down to 80Hz. Its 55 degree horizontal

dispersion pattern and trapezoid footprint allow it to be arrayed to suit a

variety of touring venues. Each W8 houses twin 12" (305mm) drivers on a

vertically splayed dual-driver low-mid horn which covers the frequency band

from 80Hz to750Hz. Frequencies above 750Hz are produced by a unique

combination of 6.5" (165mm) high-mid horn and 1" (25mm) exit high

frequency device. The sophisticated high-mid horn reproduces the 750Hz-

3.3kHz band and has been specifically developed to overcome the power

and distortion limitations of traditionally used large format compression

drivers. The result is a remarkably clean, transparent sound which can

produce extremely high levels without distress. The high-mid and high

frequency sections of the W8 can be driven actively from separate amplifier

channels, or passively using a single amplifier channel. Active or passive

operation is selected by a switch on the rear panel.

Martin Audio – WAVEFRONT TOURING SERIES

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This equipment conforms to the requirements of the

EMC Directive 89/336/EEC, amended by 92/31/EEC

and 93/68/EEC and the requirements of the Low

Voltage Directive 73/23/EEC, amended by 93/68/EEC.

Standards Applied EMC Emission EN55103-1:1996

Immunity EN55103-2:1996

Electrical Safety EN60065:1993

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3.2 W8S

The W8S is a matching sub-bass system designed for use with the W8 in

situations where low frequency enhancement is required. Its unique

Hybrid™ horn/reflex design combines the efficiency and fast transient

performance characteristics of a folded horn with the low frequency

extension of a bass reflex enclosure. The horn and reflex sections are

entirely separate – the horn being powered by a 15" (385mm) driver and

the reflex section by a powerful 18" (450mm) device. This combination of

horn and reflex technology within a single enclosure results in a dynamic

sub-bass with an efficiency of 104dB.

4 SAFETY FIRST

It is important that loudspeaker systems are used in a safe manner.

Please take some time to review the following points concerning safe use

of Wavefront Touring Series loudspeakers.

Professional loudspeakers are capable of producing extremely high sound

levels and should be used with care. Hearing loss is cumulative and can

result from levels above 90dB if people are exposed for a long period.

Never stand close to loudspeakers driven at high level.

4.1 Stacking

Ensure that the floor or stage is level and solid.

Do not stack speakers too high outdoors where winds could topple the

stack.

Be aware that speakers producing very high power levels can move or

creep. To avoid this, place friction material between the floor and speaker

and between each speaker.

4.2 Flying

Flying Systems should only be assembled from safety approved load-

rated flying bars and fittings by trained and experienced crew, working

in association with professional riggers. All arrays must be flown

from secure and appropriately load rated rigging points. Seek help

from architects, structural engineers or other specialists if in any doubt.

Wavefront Touring enclosures are fitted with MAN load certified flying points

and are designed to be flown using either the MAN Transformer flying

system or the MAN Installer/Tourer (IT) flying system. Both comply with the

12:1 safety factor as specified by the German VGB70 standard. Please

refer to the Transformer or IT user guide for complete information on using

these systems. It is essential that every MAN flying system user has the

opportunity to read the user guide and we would strongly recommend that

every user be properly trained in the safe use of the flying system before

constructing and deploying the system in a working situation.

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5 AMPLIFICATION

Wavefront Touring loudspeakers are designed to be used with professional

power amplifiers capable of producing the following power outputs into 4

ohms:

W8 450-650W

W8S 550-1000W

Care should be taken to avoid amplifier clipping. It is important to

understand that a low power amplifier driven into clipping is more likely

to damage a loudspeaker than a higher power amplifier used within its

ratings. This is because music signals have a high peak-to-average

"crest" factor. When an amplifier is severely overdriven, its output

waveform is clipped (its peaks are squared off) – reducing the crest

factor. In extreme cases, the waveform can approach that of a square

wave. An amplifier is normally capable of producing far more power

under these conditions than its undistorted rated power output.

The use of very high power amplifiers with outputs greater than those

recommended is discouraged.

Care should be taken to avoid switch-on surges, which can result in

momentary power peaks in excess of specified ratings. When powering

up a sound system it is important to switch on the amplifiers after the

mixer and control electronics have stabilised. When powering down the

system, reverse the sequence and switch off the amplifiers first.

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6 CONNECTIONS

The rear panels of the W8 and W8S are fitted with two Neutrik Speakon

NL8 connectors and two EP8 female connectors. All connectors are wired

in parallel.

EP8 NL8 W8 Active W8 Passive

1 -1 Low Mid - Low Mid -

2 +1 Low Mid + Low Mid +

3 -2 High Mid - High Mid/High -

4 +2 High Mid + High Mid/High +

5 -3 High - N/C

6 +3 High + N/C

7 -4 N/C N/C

8+4N/C N/C

EP8 NL8 W8S

1 & 3 -1 & -2 18" sub -ve

2 & 4 +1 & +2 18" sub +ve

5 & 7 -3 & -4 15" low -ve

6 & 8 +3 & +4 15" low +ve

7 CABLE LENGTHS

When connecting loudspeaker systems to an amplifier, it is recommended

that the return resistance of the cable used is less than one tenth of the

nominal impedance of the system or systems in parallel. The table below

gives an indication of the maximum permissible cable runs for various

conductor cross-sectional areas.

Conductor CSA Maximum Cable Run

4 ohms 8 ohms 16 ohms

1.0mm211m 22m 44m

1.5mm217m 34m 68m

2.0mm222m 44m 88m

2.5mm229m 58m 116m

4.0mm244m 88m 176m

6.0mm266m 132m 264m

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8 SYSTEM CONFIGURATIONS

Wavefront Touring enclosures can be used with dedicated analogue

controllers such as the Martin Audio MX5 which performs system specific

equalisation, crossover and limiter functions. More complex set-ups will

benefit from the use of a digital controller such as the Martin Audio DX1.

Wavefront Touring systems can also be used with BSS and XTA digital

controllers.

Whichever controller is used, it is important that it has fast attack limiters to

prevent amplifiers from clipping. This requires that the controller’s limiter

thresholds be set to match the sensitivity of the amplifier. A system

operated in this way with amplifiers having a power rating as recommended

and used by experienced professional sound engineers should be

sufficiently protected from overdriving. It is suggested that you refer to the

controller’s user guide for further information on how to set limiter

thresholds.

The nominal horizontal coverage pattern of the W8 is 55 degrees. This has

been found to be the optimum figure to meet the requirements of both small

scale and larger scale use. The optimum horizontal inter-cabinet angle

between enclosures is 35 degrees between cabinet centre-lines. With the

rear edges touching, this is equivalent to a 10" (250mm) gap between

cabinet fronts.

Butting up the cabinet sides is not recommended. It will reduce the

horizontal splay angle to 15 degrees which, though giving increased level

on-axis, will result in greater interference between adjacent enclosures.

Widening the splay angle to 45 degrees will increase the overall dispersion

but results in some loss of level on-axis.

The normal crossover point between the W8 and W8S is 120Hz. For

simplicity, the separate horn and reflex sections can be driven with the

same signal and amplifier channel. This will result in effective summation

of the separate sections up to the crossover point of 120Hz. However, if

the W8S is run with signal delay on the 18" and separate amplifier

channels, a further 3dB or so of output will be available in the 120-180Hz

region because of improved summation.

Wavefront Touring systems combined with the appropriately configured

controller exhibit an essentially flat on-axis frequency response.

Equalisation to compensate for a particular acoustic environment may be

performed where required. Where loudspeakers are arrayed, they may

benefit from a degree of equalisation to reduce the effect of the low/mid

build up and tilting of the response inherent in the use of multiple arrayed

enclosures.

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9 WARRANTY

Martin Audio Wavefront Touring Series products are warranted against

manufacturing defects in materials or craftsmanship over a period of 5 years

from the date of original purchase. During the warranty period Martin Audio

will, at it's discretion, either repair or replace products which prove to be

defective provided that the product is returned in its original packaging,

shipping prepaid, to an authorised Martin Audio service agent or distributor.

Martin Audio Ltd. cannot be held responsible for defects caused by

unauthorised modifications, improper use, negligence, exposure to inclement

weather conditions, act of God or accident, or any use of this product that is

not in accordance with the instructions provided by Martin Audio.

Martin Audio is not liable for consequential damages.

This warranty is exclusive and no other warranty is expressed or implied.

This warranty does not affect your statutory rights.

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10 TECHNICAL SPECIFICATIONS

TYPE 3-way full-range trapezoid,

switchable active/passive HF

FREQUENCY RESPONSE 120Hz-18kHz ± 3dB

LOW FREQUENCY LIMIT -10dB @ 80Hz

DRIVERS 2 x 12” (305mm) low-mid horn

1 x 6.5” (165mm) high-mid horn

1 x 1” (25mm) exit HF compression driver

RATED POWER Low-mid: 400W AES, 1600W peak

High-mid (/HF): 150W AES, 600W peak

HF: 60W AES, 240W peak

RECOMMENDED AMPLIFIER 450-650W into 4 ohms

SENSITIVITY Low-mid: 106dB

High-mid (/HF): 108dB

HF: 107dB

MAXIMUM SPL 129dB continuous, 135dB peak

IMPEDANCE Low-mid: 8 ohms nominal

High-mid (/HF): 16 ohms nominal

HF: 16 ohms nominal

DISPERSION 55 degs horizontal x 30 degs vertical (-6dB)

CROSSOVER 750Hz, 3.5kHz

CONNECTORS 2 x Neutrik NL8, 2 x EP8

DIMENSIONS (inc wheels) (W) 562mm x (H) 1066mm x (D) 925mm

(W) 22.0ins x (H) 42.0ins x (D) 36.5ins

WEIGHT 90kg (198lbs)

SHIPPING DIMENSIONS (W) 580mm x (H) 1070mm x (D) 930mm

(inc wheels) (W) 22.8ins x (H) 42.1ins x (D) 36.6ins

SHIPPING WEIGHT 95kg (209.4lbs)

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W8S

TYPE Hybrid™ sub-bass/horn trapezoid

FREQUENCY RESPONSE 40Hz-150Hz ± 3dB

LOW FREQUENCY LIMIT -10dB @ 30Hz

DRIVERS 1 x 15” (380mm) horn loaded

1 x 18” (460mm) reflex loaded

RATED POWER 800W AES, 3200W peak

RECOMMENDED AMPLIFIER 550-1000W into 4 ohms

SENSITIVITY 104dB

MAXIMUM SPL 131dB continuous, 137dB peak

IMPEDANCE 8 ohms nominal per driver

CROSSOVER 150Hz or below

CONNECTORS 2 x Neutrik NL8, 2 x EP8

DIMENSIONS (inc. wheels) (W) 562mm x (H) 1066mm x (D) 925mm

(inc. wheels) (W) 22.0ins x (H) 42.0ins x (D) 36.5ins

WEIGHT 90kg (198lbs)

SHIPPING DIMENSIONS (W) 580mm x (H) 1070mm x (D) 930mm

(inc wheels) (W) 22.8ins x (H) 42.1ins x (D) 36.6ins

SHIPPING WEIGHT 93kg (205lbs)

NOTES (Wavefront 8 Series)

Sensitivity measured in half-space conditions at 1 metre with 1 watt input, using band

limited pink noise. SPL measured at 1 metre using band limited pink noise.

Finish: Slate textured paint. Protective grilles: Perforated steel grey with 48% free air

flow. Cabinet construction: Birch ply.

Due to our policy of continuous improvement all specifications are subject to

change without notice.

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Wavefront Touring Series W8/W8S

Century Point, Halifax Road, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SL, England.

Telephone: +44 (0)1494 535312 Facsimile: +44 (0)1494 438669

Web: www.martin-audio.com E-mail: [email protected]

The Martin Experience

MARTIN AUDIO

LONDON

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