Martin audio WT UB user manual

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
9 WARRANTY 6
10 TECHNICAL SPECIFICATIONS 7

The Martin Experience

All material © 2007. Martin Audio Ltd. Subject to change without notice.

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MARTIN AUDIO

LONDON

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 non­approved 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. Atriple 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

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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

All material © 2007. Martin Audio Ltd. Subject to change without notice.

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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˚. Apole 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.

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All material © 2007. Martin Audio Ltd. Subject to change without notice.

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4.2 Rigging and Suspension

W

ARNING 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 auto­resetting 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.

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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

1.0mm

2

11m 22m 44m

1.5mm

2

17m 34m 68m

2.0mm

2

22m 44m 88m

2.5mm

2

29m 58m 116m

4.0mm

2

44m 88m 176m

6.0mm

2

66m 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.

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All material © 2007. Martin Audio Ltd. Subject to change without notice.

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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.

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All material © 2007. Martin Audio Ltd. Subject to change without notice.

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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.

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All material © 2007. Martin Audio Ltd. Subject to change without notice.

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Wavefront Theatre Series

WT UB

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

Telephone: [phone] Facsimile: [phone]

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

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MARTIN AUDIO

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The Martin Experience

ENGLISH

Wavefront Theatre Series

WT UB

User’s Guide

All material © 2007. Martin Audio Ltd. Subject to change without notice.

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MARTIN AUDIO

LONDON