Turbosound QLIGHT TQ-440 User Manual

QLIGHT SERIES

TQ-440

USER MANUAL

Turbosound Ltd.

Star Road, Partridge Green

West Sussex RH13 8RY England

Tel: [phone] Fax: [phone]

web: www.turbosound.com

Issue 1.0 Copyright  2000 Turbosound Ltd.

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19/12/2002 9:57 AMCONTENTS

Thanks................................................................................................................................................ 3

Unpacking.......................................................................................................................................... 3

Introduction ....................................................................................................................................... 4

Features ............................................................................................................................................. 4

Product Summary............................................................................................................................. 5

System Requirements....................................................................................................................... 6

Amplifier Considerations.................................................................................................................. 6

Equalisation....................................................................................................................................... 7

Dispersion.......................................................................................................................................... 7

Mounting and fixing.......................................................................................................................... 8

Arraying........................................................................................................................................... 12

Choosing the best location............................................................................................................. 13

Maintenance.................................................................................................................................... 14

Appendix A: Technical Specifications............................................................................................ 16

Appendix B: Spares and Accessories............................................................................................. 17

Appendix C: Warranty..................................................................................................................... 18

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Thanks

Thank you for choosing a TURBOSOUND TQ-440 loudspeaker product for your application. Please
spare a little ti me to digest the contents of this manual, so that you can obtain the best possible
performance from thi s unit.

All TURBOSOUND products are carefully engineered for world class performance and reliability.

If you would like further information about this or any other TURBOSOUND product, please
contact us. Detailed product i nformation is available on our web site at www.turbosound.com.

We look forward to helpi ng you in the near future.

Unpacking the TQ-440 loudspeaker

After unpacking the unit pl ease check carefully for damage. If damage is f ound, please notify the
carrier concerned at once. You, the consignee, must instigate any claim. Please retain all
packaging in case of future re- shipment.

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Introduction

Congratulations, you have just purchased a professional loudspeaker system from the renowned
Turbosound range, designed to give you the best in audio quality and many years of reliable,
trouble free operati on. It offers superior audio quality, unsurpassed vocal projection, full technical
documentation including EASE data, and comprehensive rigging and flying hardware opti ons.
Please read through this manual carefully before you attempt to operate the loudspeaker system.
It contains valuable info rmation enabling you to quickly and easily set up and connect the
loudspeakers, important system and set-up checks together with positioning and mounting
instructions.

Features

♦ Superb audio quality

Superb audio qualitySuperb audio quality

Super b audio quality: carefully designed and matched loudspeaker dri ve units are used
throughout to give you exceptional performance and many years of reliable, t rouble free
operation.

♦ Controlled dispersion

Controlled dispersionControlled dispersion

Controlled dispersion: the TQ-440 enclosure exhibits a tight, controlled dispersion pattern
which minimises room reflections and focuses the sound pressure directed at audience areas.

♦ Three way design

Three way designThree way design

Three way design: the exclusive use of cone transducers in the low and mid frequency bands
guarantees a seamless low/mid crossover, greater power handling, lower di stortion and
minimal mechnical stress.

♦ Time aligned componen

Time aligned componenTime aligned componen

Time aligned components

tsts

ts: the mid f requency and high frequency drive units are physicall y

time-aligned within the enclosure to ensure perfect time arrival.

♦ Solid construction

Solid constructionSolid construction

Solid construction: all Turbosound QLight series cabinets are built from high grade birch
plywood, rebated, screwed and glued together for maximum rigidity and durability.

♦ Integral rigging point s

Integral rigging point sIntegral rigging point s

Integral rigging points: fitted as standard, enabling use with many different types of optional
flying hardware.

♦ Compact enclosure

Compact enclosureCompact enclosure

Compact enclosure: custom designed 12”/1”dual concentric driver allows this three-way
enclosure to be the equivalent si ze of many traditional two-way desi gns.

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Product Summary

The TQ-440 is a compact three-way bi-amped full range enclosure that off ers uprecendented levels
of audio clarity and definition.

It incorporates a custom-designed co-axial 12"/1" combination LF/HF driver in an optimally tuned
vented trapezoidal enclosur e handling the low and high frequency bands. The critical mid-range
frequencies are handled by a propri etary 6.5" cone transducer on a 60° horizontal by 40° vertical
nominal dispersion waveguide, loaded with a TurboMid device.

The exclusive use of cone transducers in bot h the low and mid frequency bands produces a
seamless transition at the crossover frequency, with the result that all of the critical vocal range
right up to 8kHz is lower in distortion than compression driver-based designs. In addition the 6.5"
mid-range driver is a highly efficient device, and is able to handle large amounts of amplifier
power. The remaining high frequencies above 8kHz are effortlessly handled by a 1" compression
driver, operating i n a relatively narrow pass band, and therefor e subjected to minimal mechanical
stress. The mid and high components ar e physically time aligned within the encl osure, ensuring
perfect time arr ival at the listener's ear. When com pared to conventional two-way designs the TQ­440 is able to offer higher SPL, significantly lower distortion, and unsurpassed vocal projection
capabilities in an equivalently sized physical package.

The TQ-440 is designed for use with t he LM S-D6 digital loudspeaket management system, whi ch
provides model-specific crossover and limiting functions.

The TQ-440 is a full range loudspeaker, and used by itself will provide high quality audio for all
speech and many music reproduction appli cations. In order to extend the effective bass frequency
range of the loudspeaker by a further octave the use of the complementary TQ-425 subwoofer is
recommended.

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System Requirements

The TQ-440 is a bi-amped loudspeaker system . It requires two independent amplifier channels:
one channel to power the low frequency dr iver (LF) plus another channel to power the midrange
(MF) and high frequency (HF) together. A frequency dividing network is also required to split the
signal and feed it to the appr opriate driver section; the LMS-D6 digital loudspeaker management
system or the LMS-A6 loudspeaker m anagem ent system is recommended for this purpose.

Amplifier considerations

The TQ-440 should be driven by high quality power amplifiers designed for true professional use.
Such amplifiers will have balanced inputs, DC and RF fault prot ection, and well designed cooling
systems for reliability.

The program power listed in the loudspeaker’s technical specification is the best guide to the size
of amplifier required for general purpose applications. The am plifier should therefore be capable
of delivering long term broadband power equal to the loudspeaker’s program power rating at the
loudspeaker’s stated nominal impedance. This approach allows sufficient headroom to generate
good dynamic range.

RECOMMENDED AMPLIFIER POWER RATINGS:

RECOMMENDED AMPLIFIER POWER RATINGS:RECOMMENDED AMPLIFIER POWER RATINGS:

RECOMMENDED AMPLIFIER POWER RATINGS:

The amplifier's rated r.m.s. continuous power output (20Hz – 20kHz, per
channel) should be equal to the recomm ended program power handling of
the loudspeaker at its nomi n al impedance.

In general, the more powerful the amplifier the better it will sound, provided that it is not driven
into sustained clipping. It should be understood that overdriving an insufficiently powered
amplifier is mor e likely to cause loudspeaker damage – the total ener gy in a heavily clipped signal
is far higher than in an unclipped signal – than operating a more powerful amplifier within its
ratings.

One controller can be used to feed several amplifiers as long as all the am plifiers are the same (or
have the same gain ratings). More than one controller may be required if the amplifiers are of
different gain or t ype. Please contact your dealer if you require help in this area.

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Equalisation

Because the TQ-440 features a smooth and even f requency response, it does not need equalisation
or correction to overcom e the deficiencies often found in lesser desi gns.

Should extended frequency response be requir ed at more than medium sound pressure levels, the
use of the complementary TQ-425 subwoofer is strongly recommended.

In order to to compensate f or the room acoustics, the TQ-440 requir es only minimal equalisation.
As in any system, over-equalisation introduces phase shifts, distortion and a reduction in
headroom, usually causing more pr oblems than it cures.

Under most circumstances a 1/3 or 1/2 octave graphic equaliser will generally be adequate, with
the fader settings appli ed smoothly and as little as possible for the required room compensation.
Most rooms will have resonances that will be excited at particular frequencies needing some

cut

to
help tame the sound, these problem s are most pronounced at the lower frequencies where
speakers generally exhibit very little directional control.

If you find that the system needs a lot of

boost

at lower frequencies you may need additional sub­bass units. It is good pract ice to use as little equalisation as possible, aiming to cut frequencies
rather than adding large amounts of boost.

Dispersion

One of the design features of the TQ-440 is its tightly controlled 60º horizontal by 40º vertical
nominal dispersion pattern at mid and high frequencies. This gives many user advantages and
eases placement decisions, being essenti ally a point and shoot system. A 60º horizontal polar
pattern equals an angle of 30º either side of the centre line at which t he sound pressure level is 6
dB down with respect to centre, (averaged over the whole frequency range of the loudspeaker).
Thus a 40º vertical dispersion gives an angle of 20º above and below the horizon.

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Mounting and Fixing

A versatile range of mounting hardware is available for the TQ-440 that allows it to be used in a
variety of ways, in either mobile applications or permanent installations.

A top hat stand type fitti ng

A top hat stand type fitti ngA top hat stand type fitti ng

A top hat stand type fitting is mounted in the base of the cabinet
for use with 35mm diameter loudspeaker stands with a load rating
of at least 37kgs (82lbs).

This top hat fitti ng m ay also be used to mount the TQ-440 cabinet
at the correct height above the complementary TQ-425 subwoofer
using a straight 35mm pole.

Internal metric thr eaded ri gging poi nt s

Internal metric thr eaded ri gging poi nt sInternal metric thr eaded ri gging poi nt s

Internal metric t hreaded r i gging poi nts are provided
in several locations on the cabi net – on the top, bottom
and sides - enabling it to be f lown using standard M10
shoulder eyebolts (available from Turbosound).
Downward inclination of t he enclosure can be adjusted
using an additional rigging point on the rear of the
cabinet.

Side

SideSide

Side----mounted flyi ng str ips

mounted flying stripsmounted flying st ri ps

mounted flying strips can be fitted to the sides of
the enclosure by removing the count ersunk bolts on
the top and sides of the cabinet and replacing them
with the M10 bolts provided with the hardware. Two
FF-440 flying strips are required for each enclosure.
This method offers a simpl e and cost effective method
of flying single or multiple TQ-440 enclosures, with the
load being taken through the steel strips rather than
through the woodwork of the enclosure. Enclosures
may be arranged in a vertical column by coupling the
flying strips toget her using QL-75 quicklinks or
shackles.

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The universal FB

The universal FBThe universal FB

The universal FB----12 flybar assembl y

12 flybar assembly12 flybar assembly

12 flybar assembl y enables the use of
several different f ixing methods, all shown in the diagram
here. The flybar is att ached to to the cabinet using a pair of
captive M10 shoulder eyebolts (supplied). There are 12
attachment points equally spaced al ong the length of the
spine. Depending on which point is chosen for the given
attachment system, a wide range of downward inclination can
be achieved over a range of approximately 70 degrees. The
design of the flybar even all ows for upwards angles, for
example for coverage of balconies that are higher than the
loudspeaker location.

The FB-12 flybar assembly comes supplied with a U

U U

U----6 Unilock

6 Unilock 6 Unilock

6 Unilock which provides a singl e attachment
point. The point at which the Unilock is attached to the flybar deter mines the vertical angle of the
loudspeaker as shown in the table following.

A pick

pickpick

pick----up point adaptor

up point adaptorup point adaptor

up point ada ptor offers a further single attachment point. This option provides fast
adjustment of vertical angle. The point at which the eyebolt adaptor is attached to the flybar
determines the vertical angle of the loudspeaker as shown in the table fol lowing.

The SC

The SCThe SC

The SC----440 aluminium scaff ol d clam p

440 aluminium scaffold cl amp440 aluminium scaffold cl amp

440 aluminium scaffold clamp is attached to the T-bar by means of a simple clevis

coupler. It is designed to rotate horizontally through 360° in order to enable accurate positioning of

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the loudspeaker. The point at whi ch the scaffold clamp is attached to the f lybar determines the
vertical angle of the loudspeaker as shown in the table following.

The following table gives the predicted downward angle of the enclosure using the various
attachment points on the FB-12 flybar assembly.

Attachment position Vertical angle (negative angle denotes upwards)

Hole number 1 (front of cabinet)

-29°

Hole number 2

-23°

Hole number 3

-17°

Hole number 4

-10°

Hole number 5

-3°

Hole number 6

4°

Hole number 7

11°

Hole number 8

18°

Hole number 9

24°

Hole number 10

30°

Hole number 11

35°

Hole number 12 (rear of cabinet)

40°

The FH

The FHThe FH

The FH----440

440440

440 is a complete flying frame and
harness which enables the TQ-440 to be
installed with the maximum of security. It
provides unlimited vari ation of horizontal and
vertical inclination, and is very easy to re­position and angle once rigged.

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Modular flybar assembly

Modular flybar assemblyModular flybar assembly

Modular flybar assembly The key element in flying
multiple TQ-440 enclosures is a versatile Flying Bar
Assembly (FB-58), manufactured by Turbosound, that will
support a vertical column of up to three enclosures deep.
Fly bars can be linked in the hori zontal plane using the
index pins provided to form arched arrays with adjustable
(horizontal) angles from 0º to 45º at 5º increments per
cabinet. This allows arr ays and clusters of almost any
angle to be configured with the ability to change array
angles without dismantli ng and whilst suspended. This
useful feature allows f or fine tuning of speaker positions
for best coverage, throw and SPL’s.

On each side of the TQ-440 cabinet you will find keyhole
type quick-release flying plates, plus top and bottom rear
brackets for pull-up st raps and linking plates. When flying
more than one cabinet in the vertical plane speakers are
suspended on fixed length steel cables (FS-60) and pull up
straps (TS-440) to ali gn the downward angles.

Any installation, whether temporary or permanent, must
be securely attached to the str ucture of the building using chain, steel wires or web straps which
are certified and load r ated for the purpose. The combined weight of t he sound system, its cables
and the rigging system must be safely carried by the points at which attachment is made to the
building or structur e. Great care must be taken in selecting the attachment points and methods,
being absolutely sure of the load carrying capacity of points chosen.

NOTE: The rigging of loudspeaker systems is an extremely serious matter with potentially lethal
consequences should anything go wrong. It is of vital importance that you, or other people rigging
the system, are suitably qualified to do so and have a full understanding of all the factors involved
with safety as a number one priority. Turbosound accept no responsibility for any accident,
damage or failure of any rigged system. This rigging informat ion is specifically related to the
requirements of the TQ-440 series only. For more detailed infor mation on the whole topic of
rigging various handbooks are available. If you are in any doubt contact your Turbosound deal er
who will be able to refer you to an experienced rigging company.

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Arraying

The TQ-440 has a side-wall angle of 16º. Use this position for smooth horizontal dispersion that is
ideal for many applications. With the high dynamic range capability and low power compression
of the TQ-440 you should find thi s wide angle arrangement adequate for all but t he m o st
demanding long throw requirements. It also has the advantage of needing fewer cabinets to cover
the required area.

When speakers are mounted together in close proximity either stacked on t op of each other or
arrayed the output increases due to the coupling effect. For instance, stacking two cabinets on top
of each other with the top one inverted gives around 4.5 dB increase in the mid/ high section, ideal
for long throw in large halls, sports stadiums, etc. Mounting the bass drivers close to each other
gives the same gain at the low end. W hen the system is arrayed for wider angle coverage with
cabinets side by side the gain is in the order of 3db.

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Choosing the best location

It was stated earlier that the TQ-440’s tightly controlled directivity gives it essentially

point and

shoot

qualities. Every room has its own unique set of characteristics t h at affect any sound
introduced into the room . These include reverberation reflect ions and decay time, sound
absorption of materials used, temperature and humidity, etc. A degree of experimentation with
different locations (if possible) is best, especially if you are permanently installing the speaker and
have particular requir em ents where you want to concentrate the sound into a specific area.

Any boundary like a wall or floor will lift certain frequencies. If you are fixing the unit to a wall, or
in a corner then a lift at the bass end is to be expected and it may sound rather boomy. Either
reduce the low end by means of a graphic equaliser or move the speaker.

Rooms with a lot of soft furnishings, curtains and drapes will absorb sound, especially at high
frequencies. These rooms can sound rather dead and may appear to need more amplifier power to
generate high SPL’s but have the advantage t hat the sound needs less equalisation and is easier to
control. In this case the listener receives mainly

direct

sound, that is the sound emanating directly

from the loudspeaker, with little

reflected

sound.

If the room has a lot of hard, exposed surfaces such as wooden floors, brick or plaster walls or
glass windows, these will reflect the sound, causing it to bounce around the room and sounding
over bright. These rooms also tend to have various resonances that will be excited by high SPL’s.
Listening in the middle of the room you will hear a lot of

reflected

sound in comparison with the

direct

sound. Care is needed with speaker positioning, SPL’s and equalisation. If the room is large
and very reverberant then bass roll-off below about 250 Hz may be required to ensure a
reasonable level of intelligibility.

For long, narrow rooms the traditional left and right stacks (floor, wall mounted or fl own) can
suffice with good stereo i maging in the centre of the room. For m u lti-tier venues such as theatres,
speakers should be flown or wall mounted to project into each tier. In highly reverberant rooms
often a central cluster is the best option. This acts as a virtual point source with all the sound
emanating from one point i n the room, but path lengths should be carefully calculated.

The relationship between sound pressure level and distance is an “inverse square law” so
remember that every time the distance from the sound source is doubled the sound level
decreases by 6dB. For every 3dB increase of speaker output you need a doubling of input power
and you can work out the Wattage input needed to give the required SPL levels at various
distances from the loudspeaker (s).

When speakers are flown in fr ee space then boundary effects are minimised. The result is a
smooth frequency response without any boost at odd frequencies, but the bass end may appear
subjectively light. In this case you will need floor mounted sub-bass, to bring the low end up.

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Maintenance

If one of the drive unit s in the cabinet should cease functioning and needs a replacement recone or
diaphragm you are advised to remove the faulty unit from the cabinet and send it to a professional
recone service authorised to recone Turbosound loudspeakers. This will ensure the continued high
performance of your TQ-440.

Removal of the 12”/1” driver

1. Unscrew the eight countersunk screws from the two vertical battens which hold the protective
grille in place. Be careful when removing the grille as it is under tension and may spring
outwards when released. Set the battens, grille and fixing screws aside for later re-assembly.

2. Undo the eight M6 x 30mm Allen head bolt s holding the driver in place and carefully pull it
out and away from the cabinet. WA RNING - This unit is heavy! You will notice that the 1” high
frequency driver is att ached to the back of the 12” low frequency driver by its screw adapter.
Disconnect the cables from both HF and LF units and completely remove the driver assembly
from the cabinet. Make a note of the driver polarity for later reconnection.

3. Separate the drive units by unscr ewing the high frequency driver anti-clockwise and lift it
away from the low frequency driver. Depending on which section needs servicing, the
appropriate drive unit should be returned to an authorised Turbosound service cent re.

4. To reinstate the drivers, simply reverse the above procedure making sure you observe the
correct polarity when reconnecting the cables back into the terminals of the drive units.

Removal of the midrange drive unit

If the midrange drive unit requires maintenance, it will first be necessary to remove the rear panel.
The midrange driver is held in place by a M10 x 25mm bolt through the rear of the cabinet into the
back plate of the drive unit behind the rear panel. Once this is released the midrange horn and
drive unit assembly can be removed.

1. Remove the #10 x 1 ½” countersunk woodscrews securing the rear panel of the cabinet. The
M10 bolt securing the midrange driver will now be accessible in a recess in the enclosure rear
panel. Using a 17mm socket, unscrew t he bolt and set aside for later re-assem bly.

2. Unscrew the eight countersunk screws from the two vertical battens which hold the protective
grille in place. Be careful when removing the grille as it is under tension and may spring
outwards when released. Set the battens, grille and fixing screws aside for later re-assembly.

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3. The midrange horn is secured through t h e m ounting flange with four #10 x 1/12” pan head
wood screws. Unscrew these and lift out the horn and driver assembly.

4. Disconnect the cables, making a note of the polarity, and carefully l ift the driver clear.

For any other servicing requi rements please contact your Turbosound dealer or authorised service
centre.

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APPENDIX A

Technical Specifications

Dimensions 558mm x 409mm x 363mm (23.1” x 16.1” x 14.3”)

Net weight 30kgs (66lbs)

Components 12”/1” LF/HF dual concentric driver, 6.5” MF driver on a TurboMid

device

Frequency response 75Hz – 20kHz ±4dB (with LMS-D6)

Nominal dispersion 60°H x 40°V @-6dB points

Power handling LF: 300 watts r.m.s., 600 watts program, 750 watts peak

MF/HF: 150 watts r.m. s., 300 watts program, 375 watts peak

Sensitivity LF: 103dB, 1 watt @ 1 metre; M F/HF: 104dB, 1 watt @ 1 metre

Maximum SPL 131dB continuous, 137dB peak

Crossover Active LF/MF: 1k3Hz, 24dB/octave slope, Linkwitz-Riley

Internal passive crossover at 8kHz, double fourth order high pass

Construction 15mm (5/8”) birch plywood throughout; rebated, screwed and glued.

Finished in black semi-mat t textured paint. Two recessed carrying
handles. Integral 35mm pole m ount. Two keyhole flyplates

Grille Reticulated foam on expanded steel mesh

Connectors (2) Neutrik Speakon NL4MP

wired pin 1+ LF positive, pin 1- LF negative
pin 2+ MF/HF positive, pin 2- MF/HF negative

Options TurboBlue semi-matt t extured paint

Due to continuing product improvement the above specifications are subject to change.

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APPENDIX B

Spares and accessories

LS-1214 12” (305mm) LF loudspeaker
RC-1214 Recone kit for LS-1214
LS-6505 6.5” (165mm) MF loudspeaker
RC-6505 Recone kit for LS-6505
CD-103 1” (25mm) HF compression dri ver
RD-103 Replacement diaphragm for CD-103
PX-440BI Internal passive crossover network
MG-440 Replacement foam / metal grille

Flying accessories

EB-10 M10 shoulder eyebolt
FF-440 Flying strips (2 requi red per enclosure)
FB-12 Universal fly bar assembly
PP-440 Pick-up point adaptor
U-6 Unilock
SC-440 Scaffold clamp
FB-58 Modular fly bar assembly
FS-60 Flying steel
TS-440 Tilt strap
BS-440 Biscuit
FH-440 Flying frame and harness

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APPENDIX C: WARRANTY

Limited Warranty

This Turbosound loudspeaker product is war ranted to the original end-user purchaser and all
subsequent owners for a period of two (2) years from the original date of purchase.

Warranty Coverage

Warranty coverage includes defects in materials and workmanship. It does not include:

♦ damage caused by accident, misuse, abuse, neglect or modifi cation by any person other than

an authorised Turbosound representat ive,

♦ damage caused by over driving, use with unsuitable amplifiers or amplifier failure,

♦ damage caused by f ailure to operate the product in accordance with the instructions

contained in the user manual,

♦ damage occur ing during shipment in transit,

♦ claims based on any misrepresentation by the seller ,

♦ products which do not have the original components as specifi ed in the product engineering

information,

♦ products on which the serial number has been removed or defaced.

Shipping

Should any fault develop with a component of your Turbosound system, please return the
product, freight pr e-paid, in its original packing carton, along with proof of purchase such as the
original bill of sale or receipted invoice, and a description of the suspected fault to Turbosound
Ltd. (Att: Customer Service), Star Road, Partri dge Green, West Sussex RH13 8RY, England, or your
local authorised Turbosound repr esentative. The product serial number must be quoted in all
correspondence relating to t h e claim. Insurance is recommended, as Turbosound or i ts
representatives are not liable for loss or damage in transit. Turbosound will pay for return freight
costs should repairs be covered under warranty.

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Incidental and consequential damages

Turbosound's liability is limited to the repair or replacement, at our option, of any defective
product, and shall not be liable for any incidental and consequential damages including, without
limitation, i njury to persons or property or loss of use.

Limitation of implied warranties

All implied warranties, including warranties of merchantability and fitness for a particular purpose,
are limited in duration to the length of this warranty.

This warranty is in addition to, and in no way detracts from, your statutory rights as a consumer.
No other warranty is expressed or implied.

Please record your purchase information below for future reference:

Dealer Name ......................................................................................................................

Dealer Address ..................................................................................................................

............................................................................................................................................

............................................................................................................................................

Post / Zip Code ..................................................................................................................

Dealer telephone / fax .......................................................................................................

Invoice number .................................................................................................................

Date of purchase ...............................................................................................................

Unit serial number ............................................................................................................

Turbosound Ltd.

Star Road, Partridge Green

West Sussex RH13 8RY England

Tel: [phone] Fax: [phone]

web: www.turbosound.com