Turbosound Portable Speaker TQ 440 User Manual

QLIGHTSERIES  
TQ-440  
USER MANUAL  
Turbosound Ltd.  
Star Road, Partridge Green  
West Sussex RH13 8RY England  
Tel: +44 (0)1403 711447 Fax: +44 (0)1403 710155  
Issue 1.0 Copyright 2000 Turbosound Ltd.  
 
                                                                          
                                                                          
user manual  
QLightseries  
Thanks  
Thank you for choosing a TURBOSOUND TQ-440 loudspeaker product for your application. Please  
spare a little tim e to digest the contents of this m anual, so that you can obtain the best possible  
perform ance from this unit.  
All TURBOSOUND products are carefully engineered for world class perform ance and reliability.  
If you would like further inform ation about this or any other TURBOSOUND product, please  
We look forward to helping you in the near future.  
Unpacking the TQ-440 loudspeaker  
After unpacking the unit please check carefully for dam age. If dam age is found, please notify the  
carrier concerned at once. You, the consignee, m ust instigate any claim . Please retain all  
packaging in case of future re-shipm ent.  
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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 m any years of reliable,  
trouble free operation. It offers superior audio quality, unsurpassed vocal projection, full technical  
docum entation including EASE data, and com prehensive rigging and flying hardware options.  
Please read through this m anual carefully before you attem pt to operate the loudspeaker system .  
It contains valuable inform ation enabling you to quickly and easily set up and connect the  
loudspeakers, im portant system and set-up checks together with positioning and m ounting  
instructions.  
Features  
Superb audio quality: carefully designed and m atched loudspeaker drive units are used  
throughout to give you exceptional perform ance and m any years of reliable, trouble free  
operation.  
Controlled dispersion: the TQ-440 enclosure exhibits a tight, controlled dispersion pattern  
which m inim ises room reflections and focuses the sound pressure directed at audience areas.  
Three way design: the exclusive use of cone transducers in the low and m id frequency bands  
guarantees a seam less low/m id crossover, greater power handling, lower distortion and  
m inim al m echnical stress.  
Tim e aligned com ponents: the m id frequency and high frequency drive units are physically  
tim e-aligned within the enclosure to ensure perfect tim e arrival.  
Solid construction: all Turbosound QLight series cabinets are built from high grade birch  
plywood, rebated, screwed and glued together for m axim um rigidity and durability.  
Integral rigging points: fitted as standard, enabling use with m any different types of optional  
flying hardware.  
Com pact enclosure: custom designed 12”/1”dual concentric driver allows this three-way  
enclosure to be the equivalent size of m any traditional two-way designs.  
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Product Summary  
The TQ-440 is a com pact three-way bi-am ped full range enclosure that offers uprecendented levels  
of audio clarity and definition.  
It incorporates a custom -designed co-axial 12"/1" com bination LF/HF driver in an optim ally tuned  
vented trapezoidal enclosure handling the low and high frequency bands. The critical m id-range  
frequencies are handled by a proprietary 6.5" cone transducer on a 60° horizontal by 40° vertical  
nom inal dispersion waveguide, loaded with a TurboMiddevice.  
The exclusive use of cone transducers in both the low and m id frequency bands produces a  
seam less transition at the crossover frequency, with the result that all of the critical vocal range  
right up to 8kHz is lower in distortion than com pression driver-based designs. In addition the 6.5"  
m id-range driver is a highly efficient device, and is able to handle large am ounts of am plifier  
power. The rem aining high frequencies above 8kHz are effortlessly handled by a 1" com pression  
driver, operating in a relatively narrow pass band, and therefore subjected to m inim al m echanical  
stress. The m id and high com ponents are physically tim e aligned within the enclosure, ensuring  
perfect tim e arrival at the listener's ear. When com pared to conventional two-way designs the TQ-  
440 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 the LMS-D6 digital loudspeaket m anagem ent system , which  
provides m odel-specific crossover and lim iting functions.  
The TQ-440 is a full range loudspeaker, and used by itself will provide high quality audio for all  
speech and m any m usic reproduction applications. In order to extend the effective bass frequency  
range of the loudspeaker by a further octave the use of the com plem entary TQ-425 subwoofer is  
recom m ended.  
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System Requirements  
The TQ-440 is a bi-am ped loudspeaker system . It requires two independent am plifier channels:  
one channel to power the low frequency driver (LF) plus another channel to power the m idrange  
(MF) and high frequency (HF) together. A frequency dividing network is also required to split the  
signal and feed it to the appropriate driver section; the LMS-D6 digital loudspeaker m anagem ent  
system or the LMS-A6 loudspeaker m anagem ent system is recom m ended for this purpose.  
Amplifier considerations  
The TQ-440 should be driven by high quality power am plifiers designed for true professional use.  
Such am plifiers will have balanced inputs, DC and RF fault protection, and well designed cooling  
system s for reliability.  
The program power listed in the loudspeakers technical specification is the best guide to the size  
of am plifier required for general purpose applications. The am plifier should therefore be capable  
of delivering long term broadband power equal to the loudspeakers program power rating at the  
loudspeakers stated nom inal im pedance. This approach allows sufficient headroom to generate  
good dynam ic range.  
RECOMMENDED AMPLIFIER POWER RATINGS:  
The am plifier's rated r.m .s. continuous power output (20Hz – 20kHz, per  
channel) should be equal to the recom m ended program power handling of  
the loudspeaker at its nom inal im pedance.  
In general, the m ore powerful the am plifier the better it will sound, provided that it is not driven  
into sustained clipping. It should be understood that overdriving an insufficiently powered  
am plifier is m ore likely to cause loudspeaker dam age – the total energy in a heavily clipped signal  
is far higher than in an unclipped signal – than operating a m ore powerful am plifier within its  
ratings.  
One controller can be used to feed several am plifiers as long as all the am plifiers are the sam e (or  
have the sam e gain ratings). More than one controller m ay be required if the am plifiers are of  
different gain or type. Please contact your dealer if you require help in this area.  
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Equalisation  
Because the TQ-440 features a sm ooth and even frequency response, it does not need equalisation  
or correction to overcom e the deficiencies often found in lesser designs.  
Should extended frequency response be required at m ore than m edium sound pressure levels, the  
use of the com plem entary TQ-425 subwoofer is strongly recom m ended.  
In order to to com pensate for the room acoustics, the TQ-440 requires only m inim al equalisation.  
As in any system , over-equalisation introduces phase shifts, distortion and a reduction in  
headroom , usually causing m ore problem s than it cures.  
Under m ost circum stances a 1/3 or 1/2 octave graphic equaliser will generally be adequate, with  
the fader settings applied sm oothly and as little as possible for the required room com pensation.  
Most room s will have resonances that will be excited at particular frequencies needing som e cut to  
help tam e the sound, these problem s are m ost 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 m ay need additional sub-  
bass units. It is good practice to use as little equalisation as possible, aim ing to cut frequencies  
rather than adding large am ounts of boost.  
Dispersion  
One of the design features of the TQ-440 is its tightly controlled 60º horizontal by 40º vertical  
nom inal dispersion pattern at m id and high frequencies. This gives m any user advantages and  
eases placem ent decisions, being essentially a point and shoot system . A 60º horizontal polar  
pattern equals an angle of 30º either side of the centre line at which the 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 m ounting hardware is available for the TQ-440 that allows it to be used in a  
variety of ways, in either m obile applications or perm anent installations.  
A top hat stand type fitting is m ounted in the base of the cabinet  
for use with 35m m diam eter loudspeaker stands with a load rating  
of at least 37kgs (82lbs).  
This top hat fitting m ay also be used to m ount the TQ-440 cabinet  
at the correct height above the com plem entary TQ-425 subwoofer  
using a straight 35m m pole.  
Internal m etric threaded rigging points are provided  
in several locations on the cabinet – on the top, bottom  
and sides - enabling it to be flown using standard M10  
shoulder eyebolts (available from Turbosound).  
Downward inclination of the enclosure can be adjusted  
using an additional rigging point on the rear of the  
cabinet.  
Side-m ounted flying strips can be fitted to the sides of  
the enclosure by rem oving the countersunk 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 m ethod offers a sim ple and cost effective m ethod  
of flying single or m ultiple TQ-440 enclosures, with the  
load being taken through the steel strips rather than  
through the woodwork of the enclosure. Enclosures  
m ay be arranged in a vertical colum n by coupling the  
flying strips together using QL-75 quicklinks or  
shackles.  
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The universal FB-12 flybar assem bly enables the use of  
several different fixing m ethods, all shown in the diagram  
here. The flybar is attached to to the cabinet using a pair of  
captive M10 shoulder eyebolts (supplied). There are 12  
attachm ent points equally spaced along the length of the  
spine. Depending on which point is chosen for the given  
attachm ent system , a wide range of downward inclination can  
be achieved over a range of approxim ately 70 degrees. The  
design of the flybar even allows for upwards angles, for  
exam ple for coverage of balconies that are higher than the  
loudspeaker location.  
The FB-12 flybar assem bly com es supplied with a U-6 Unilock which provides a single attachm ent  
point. The point at which the Unilock is attached to the flybar determ ines the vertical angle of the  
loudspeaker as shown in the table following.  
A pick-up point adaptor offers a further single attachm ent point. This option provides fast  
adjustm ent of vertical angle. The point at which the eyebolt adaptor is attached to the flybar  
determ ines the vertical angle of the loudspeaker as shown in the table following.  
The SC-440 alum inium scaffold clam p is attached to the T-bar by m eans of a sim ple 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 which the scaffold clam p is attached to the flybar determ ines 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  
attachm ent points on the FB-12 flybar assem bly.  
Attachm ent position  
Vertical angle (negative angle denotes upwards)  
-29°  
-23°  
-17°  
-10°  
-3°  
Hole num ber 1 (front of cabinet)  
Hole num ber 2  
Hole num ber 3  
Hole num ber 4  
Hole num ber 5  
4°  
Hole num ber 6  
11°  
18°  
24°  
30°  
35°  
40°  
Hole num ber 7  
Hole num ber 8  
Hole num ber 9  
Hole num ber 10  
Hole num ber 11  
Hole num ber 12 (rear of cabinet)  
The FH-440 is a com plete flying fram e and  
harness which enables the TQ-440 to be  
installed with the m axim um of security. It  
provides unlim ited variation of horizontal and  
vertical inclination, and is very easy to re-  
position and angle once rigged.  
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Modular flybar assem bly The key elem ent in flying  
m ultiple TQ-440 enclosures is a versatile Flying Bar  
Assem bly (FB-58), m anufactured by Turbosound, that will  
support a vertical colum n of up to three enclosures deep.  
Fly bars can be linked in the horizontal plane using the  
index pins provided to form arched arrays with adjustable  
(horizontal) angles from 0º to 45º at 5º increm ents per  
cabinet. This allows arrays and clusters of alm ost any  
angle to be configured with the ability to change array  
angles without dism antling and whilst suspended. This  
useful feature allows for fine tuning of speaker positions  
for best coverage, throw and SPLs.  
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 straps and linking plates. When flying  
m ore than one cabinet in the vertical plane speakers are  
suspended on fixed length steel cables (FS-60) and pull up  
straps (TS-440) to align the downward angles.  
Any installation, whether tem porary or perm anent, m ust  
be securely attached to the structure of the building using chain, steel wires or web straps which  
are certified and load rated for the purpose. The com bined weight of the sound system , its cables  
and the rigging system m ust be safely carried by the points at which attachm ent is m ade to the  
building or structure. Great care m ust be taken in selecting the attachm ent points and m ethods,  
being absolutely sure of the load carrying capacity of points chosen.  
NOTE: The rigging of loudspeaker system s is an extrem ely serious m atter with potentially lethal  
consequences should anything go wrong. It is of vital im portance 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 num ber one priority. Turbosound accept no responsibility for any accident,  
dam age or failure of any rigged system . This rigging inform ation is specifically related to the  
requirem ents of the TQ-440 series only. For m ore detailed inform ation on the whole topic of  
rigging various handbooks are available. If you are in any doubt contact your Turbosound dealer  
who will be able to refer you to an experienced rigging com pany.  
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Arraying  
The TQ-440 has a side-wall angle of 16º. Use this position for sm ooth horizontal dispersion that is  
ideal for m any applications. With the high dynam ic range capability and low power com pression  
of the TQ-440 you should find this wide angle arrangem ent adequate for all but the m ost  
dem anding long throw requirem ents. It also has the advantage of needing fewer cabinets to cover  
the required area.  
When speakers are m ounted together in close proxim ity either stacked on top 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 m id/high section, ideal  
for long throw in large halls, sports stadium s, etc. Mounting the bass drivers close to each other  
gives the sam e gain at the low end. When 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-440s tightly controlled directivity gives it essentially point and  
shoot qualities. Every room has its own unique set of characteristics that affect any sound  
introduced into the room . These include reverberation reflections and decay tim e, sound  
absorption of m aterials used, tem perature and hum idity, etc. A degree of experim entation with  
different locations (if possible) is best, especially if you are perm anently installing the speaker and  
have particular requirem 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 m ay sound rather boom y. Either  
reduce the low end by m eans of a graphic equaliser or m ove the speaker.  
Room s with a lot of soft furnishings, curtains and drapes will absorb sound, especially at high  
frequencies. These room s can sound rather dead and m ay appear to need m ore am plifier power to  
generate high SPL’s but have the advantage that the sound needs less equalisation and is easier to  
control. In this case the listener receives m ainly direct sound, that is the sound em anating 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 room s also tend to have various resonances that will be excited by high SPLs.  
Listening in the m iddle of the room you will hear a lot of reflected sound in com parison 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 m ay be required to ensure a  
reasonable level of intelligibility.  
For long, narrow room s the traditional left and right stacks (floor, wall m ounted or flown) can  
suffice with good stereo im aging in the centre of the room . For m ulti-tier venues such as theatres,  
speakers should be flown or wall m ounted to project into each tier. In highly reverberant room s  
often a central cluster is the best option. This acts as a virtual point source with all the sound  
em anating from one point in the room , but path lengths should be carefully calculated.  
The relationship between sound pressure level and distance is an “inverse square law” so  
rem em ber that every tim e 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 free space then boundary effects are m inim ised. The result is a  
sm ooth frequency response without any boost at odd frequencies, but the bass end m ay appear  
subjectively light. In this case you will need floor m ounted sub-bass, to bring the low end up.  
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Maintenance  
If one of the drive units in the cabinet should cease functioning and needs a replacem ent recone or  
diaphragm you are advised to rem ove 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  
perform ance 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 rem oving the grille as it is under tension and m ay spring  
outwards when released. Set the battens, grille and fixing screws aside for later re-assem bly.  
2. Undo the eight M6 x 30m m Allen head bolts holding the driver in place and carefully pull it  
out and away from the cabinet. WARNING - This unit is heavy! You will notice that the 1” high  
frequency driver is attached to the back of the 12” low frequency driver by its screw adapter.  
Disconnect the cables from both HF and LF units and com pletely rem ove the driver assem bly  
from the cabinet. Make a note of the driver polarity for later reconnection.  
3. Separate the drive units by unscrewing 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 centre.  
4. To reinstate the drivers, sim ply reverse the above procedure m aking sure you observe the  
correct polarity when reconnecting the cables back into the term inals of the drive units.  
Removal of the midrange drive unit  
If the m idrange drive unit requires m aintenance, it will first be necessary to rem ove the rear panel.  
The m idrange driver is held in place by a M10 x 25m m bolt through the rear of the cabinet into the  
back plate of the drive unit behind the rear panel. Once this is released the m idrange horn and  
drive unit assem bly can be rem oved.  
1. Rem ove the #10 x 1 ½” countersunk woodscrews securing the rear panel of the cabinet. The  
M10 bolt securing the m idrange driver will now be accessible in a recess in the enclosure rear  
panel. Using a 17m m socket, unscrew the 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 rem oving the grille as it is under tension and m ay spring  
outwards when released. Set the battens, grille and fixing screws aside for later re-assem bly.  
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3. The m idrange horn is secured through the m ounting flange with four #10 x 1/12” pan head  
wood screws. Unscrew these and lift out the horn and driver assem bly.  
4. Disconnect the cables, m aking a note of the polarity, and carefully lift the driver clear.  
For any other servicing requirem ents please contact your Turbosound dealer or authorised service  
centre.  
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APPENDIX A  
Technical Specifications  
Dim ensions  
Net weight  
Com ponents  
558m m x 409m m x 363m m (23.1” x 16.1” x 14.3”)  
30kgs (66lbs)  
12”/1” LF/HF dual concentric driver, 6.5” MF driver on a TurboMid  
device  
Frequency response  
Nom inal dispersion  
Power handling  
75Hz – 20kHz ±4dB (with LMS-D6)  
60°H x 40°V @-6dB points  
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 m etre; MF/HF: 104dB, 1 watt @ 1 m etre  
131dB continuous, 137dB peak  
Maxim um SPL  
Crossover  
Active LF/MF: 1k3Hz, 24dB/octave slope, Linkwitz-Riley  
Internal passive crossover at 8kHz, double fourth order high pass  
Construction  
15m m (5/8”) birch plywood throughout; rebated, screwed and glued.  
Finished in black sem i-m att textured paint. Two recessed carrying  
handles. Integral 35m m pole m ount. Two keyhole flyplates  
Grille  
Reticulated foam on expanded steel m esh  
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 sem i-m att textured paint  
Due to continuing product im provem ent the above specifications are subject to change.  
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APPENDIX B  
Spares and accessories  
LS-1214  
RC-1214  
LS-6505  
RC-6505  
CD-103  
12” (305m m ) LF loudspeaker  
Recone kit for LS-1214  
6.5” (165m m ) MF loudspeaker  
Recone kit for LS-6505  
1” (25m m ) HF com pression driver  
Replacem ent diaphragm for CD-103  
Internal passive crossover network  
Replacem ent foam / m etal grille  
RD-103  
PX-440BI  
MG-440  
Flying accessories  
EB-10  
FF-440  
FB-12  
PP-440  
U-6  
M10 shoulder eyebolt  
Flying strips (2 required per enclosure)  
Universal fly bar assem bly  
Pick-up point adaptor  
Unilock  
SC-440  
FB-58  
FS-60  
TS-440  
BS-440  
FH-440  
Scaffold clam p  
Modular fly bar assem bly  
Flying steel  
Tilt strap  
Biscuit  
Flying fram e and harness  
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APPENDIX C: WARRANTY  
Limited Warranty  
This Turbosound loudspeaker product is warranted 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 m aterials and workm anship. It does not include:  
dam age caused by accident, m isuse, abuse, neglect or m odification by any person other than  
an authorised Turbosound representative,  
dam age caused by overdriving, use with unsuitable am plifiers or am plifier failure,  
dam age caused by failure to operate the product in accordance with the instructions  
contained in the user m anual,  
dam age occuring during shipm ent in transit,  
claim s based on any m isrepresentation by the seller,  
products which do not have the original com ponents as specified in the product engineering  
inform ation,  
products on which the serial num ber has been rem oved or defaced.  
Shipping  
Should any fault develop with a com ponent of your Turbosound system , please return the  
product, freight pre-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: Custom er Service), Star Road, Partridge Green, West Sussex RH13 8RY, England, or your  
local authorised Turbosound representative. The product serial num ber m ust be quoted in all  
correspondence relating to the claim . Insurance is recom m ended, as Turbosound or its  
representatives are not liable for loss or dam age 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 lim ited to the repair or replacem ent, at our option, of any defective  
product, and shall not be liable for any incidental and consequential dam ages including, without  
lim itation, injury to persons or property or loss of use.  
Limitation of implied warranties  
All im plied warranties, including warranties of m erchantability and fitness for a particular purpose,  
are lim ited 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 consum er.  
No other warranty is expressed or im plied.  
Please record your purchase inform ation below for future reference:  
Dealer Nam e ......................................................................................................................  
Dealer Address ..................................................................................................................  
............................................................................................................................................  
............................................................................................................................................  
Post / Zip Code ..................................................................................................................  
Dealer telephone / fax .......................................................................................................  
Invoice num ber .................................................................................................................  
Date of purchase ...............................................................................................................  
Unit serial num ber ............................................................................................................  
TQ-440 manual  
page 19  
 
 
Turbosound Ltd.  
Star Road, Partridge Green  
West Sussex RH13 8RY England  
Tel: +44 (0)1403 711447 Fax: +44 (0)1403 710155  
 

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