Martin Audio WT UB Manuale utente

Martin Audio – WT UB

CONTENTS (ENGLISH) Page No

1 INTRODUCTION 2

2 UNPACKING 2

3 OVERVIEW 2

4 SAFETY FIRST 3

4.1 Tripod Mounting 3

4.2 Rigging and Suspension 4

5 AMPLIFICATION 4

6 CONNECTIONS 5

7 CABLE LENGTHS 5

8 SYSTEM CONFIGURATIONS 5

9WARRANTY 6

10 TECHNICAL SPECIFICATIONS 7

MARTIN AUDIO

LONDON

The Martin Experience

1 INTRODUCTION

Thank you for purchasing a Martin Audio Wavefront Theatre Series product.

The Theatre Series is a dedicated range of powerful yet compact

loudspeakers designed to meet the unique demands of theatre sound

reinforcement.

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

The Wavefront Theatre WT UB loudspeaker has been specifically designed

for under-balcony use in theatres and infill in venues requiring extremely

wide horizontal coverage.

The WT UB loudspeaker provides sound reinforcement for speech and

music with exceptionally consistent tonal balance over the whole of its

coverage angle. It also shares the same tonal characteristics as the larger

members of the WT range, the WT2 and 3.

The unusual driver complement and geometry is responsible for the uniform

coverage of the enclosure. A triple soft dome, high frequency line array

coupled with a proprietary diffusion phase plug gives very wide horizontal

and tight vertical dispersion. Its narrow width allows minimal separation

between the two 6.5" (165mm) cone drivers. This factor and the drivers’ 60˚

splay are responsible for the seamless horizontal coverage of the WT UB.

The two 6.5" (165mm) drivers feature 1.5" (38mm) voice coils and an

innovative heat exchange system to reduce power compression. A

combination of ferrofluid and a rear mounted heatsink cools the high

Martin Audio – WT UB

ENGLISH

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

frequency line array’s neodymium magnet assembly, with extreme high

frequency overload being dealt with by an auto-resetting over-current

device.

Featuring fully passive operation and requiring no controller, the WT UB is

extremely straightforward to deploy. The enclosure input configuration is

externally switchable between pins 1 and 2 on the fitted Neutrik NL4MP

connectors. This allows daisy-chaining of cabinets via a 4 core cable, even

when they are fed with different input signals.

The rugged, multi-laminate birch ply enclosure features M8 inserts for the

dedicated mounting bracket and an additional M8 ‘safety chain’ point. The

multi-angled cabinet rear allows close proximity ceiling mounting with a

downward tilt of up to 45˚. A pole mount socket gives the additional option

of tripod stand mounting.

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 Theatre 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 a high level.

4.1 Tripod Mounting

The WT UB incorporates a pole mounting socket to facilitate mounting on

tripod stands. When using stands, the following precautions are advised:

Ensure that that stand will support the weight of the speaker by checking

the stand manufacturers rating.

Make sure that the stand is placed on a level surface and that its legs are

fully extended.

Do not place more than one speaker on each stand.

Run cables so that they do not present a trip hazard which could pull the

speaker over.

When used outdoors in the wind, it may be necessary to add some weight

to the base of the stand.

When using a pole mount with a sub-bass system, observe similar

precautions.

Martin Audio – WT UB

ENGLISH

4.2 Rigging and Suspension

WARNING Suspending the system should only be done by qualified

personnel following safe rigging practices. Secure fixings to the building

structure are vital. Seek help from architects, structural engineers or

other specialists if in any doubt.

The WT UB is supplied with threaded inserts and a mounting yoke to allow the

suspension of a single enclosure. Please note that suspending one

enclosure from another using these inserts to form an array or cluster is

not recommended.

5 AMPLIFICATION

The WT UB speaker should be used with professional power amplifiers

capable of producing 200-400W into 4 ohms.

Whilst the WT UB does not require a controller for crossover or equalisation

functions it is advisable to provide signal limiting to avoid amplifier clipping. To

perform this function the WX3A, MX5 and DX1 controllers can be configured

purely as high performance limiters.

Additional protection of the high frequency line array is provided by an auto-

resetting over-current device. This protects against overload as a result of

severe amplifier clipping and short high frequency, high power bursts such as

microphone feedback. When the over-current device operates it may be

necessary to turn down the signal level to the speaker in order to reset the

device and restore high frequency output.

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.

Martin Audio – WT UB

ENGLISH

6 CONNECTIONS

The connector panel has two Neutrik NL4MP Speakon connectors wired in

parallel with each other. The second connector allows use of a short link

lead to power another parallel loudspeaker. The input pin configuration is

selected by a rear mounted switch which additionally allows daisy-chaining

of cabinets via a four core cable, even when fed with different input signals.

The connectors are wired as follows:

NL4 Pin WT UB Switch position

1- Input 1 -ve UP

1+ Input 1 +ve UP

2- Input 2 -ve DOWN

2+ Input 2 +ve DOWN

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

8 SYSTEM CONFIGURATIONS

The WT UB may be used to cover the full-frequency range – either

distributed singly or arrayed in multiples. Optimum splay angle is 60˚

between cabinet sides. In this manner three closely arrayed WT UB

speakers can cover 360˚ in the horizontal plane.

The WT UB loudspeaker exhibits an essentially flat on-axis frequency

response. Equalisation to compensate for a particular acoustic environment

may be performed where required.

Martin Audio – WT UB

ENGLISH

9 WARRANTY

Martin Audio Wavefront WT UB loudspeakers 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.

Martin Audio – WT UB

ENGLISH

10 TECHNICAL SPECIFICATIONS

WTUB

TYPE Two-way passive, reflex enclosure

FREQUENCY RESPONSE (1) 80Hz-18kHz ± 3dB

DRIVERS 2 x 6.5" (165mm) bass mid drivers

with 1.5'' (38mm) voice coil

3 x 1" (25mm) soft dome HF line array

RATED POWER (2) 200W AES, 800W peak

RECOMMENDED AMPLIFIER 200-400W into 4 ohms

SENSITIVITY (3) 93dB 1 Watt/1 metre

MAXIMUM SPL (4) 115dB continuous, 121dB peak

IMPEDANCE 8 ohms nominal

DISPERSION (-6dB) 120˚ horizontal, 40˚ vertical

CROSSOVER 1.2kHz passive

ENCLOSURE 16 litre (0.6 cu foot) multi-laminate

birch ply

FINISH Textured black paint

PROTECTIVE GRILLE Black perforated steel

CONNECTORS 2 x Neutrik NL4 switchable for

input +1, -1 or +2, -2

FITTINGS 2 x M8 threaded inserts for

dedicated bracket

1 x M8 insert for safety point

1 x pole mount socket

DIMENSIONS (W)480mm x (H)212mm x (D)342mm

(W)18.9ins x (H)8.4ins x (D)13.5ins

WEIGHT 12kg (26.4 lbs)

SHIPPING DIMENSIONS (W) 560mm x (H) 320mm x (D) 410mm

(W) 22ins x (H)12.5ins x (D)16.1ins

SHIPPING WEIGHT 16kg (35.3lbs)

Notes

1. Measured on-axis in half space at 2 metres, then referred to 1 metre.

2. AES Standard ANSI S4.26-1984.

3. Measured in half space conditions at 2 metres with 1 watt input, using band limited pink noise,

then referred to 1 metre.

4. Measured in half space conditions at 2 metres using band limited pink noise, then

referred to 1 metre.

Due to our policy of continuous improvement all specifications are subject

to change without notice.

Martin Audio – WT UB

ENGLISH

Wavefront Theatre Series

WT UB

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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The Martin Experience

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Wavefront Theatre Series

WT UB

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