Turbosound Impact 50 Manual de usuario

IMPACT 50

IMPACT 50T

USER MANUAL

Turbosound Ltd.

Star Road, Partridge Green

West Sussex RH13 8RY England

Tel: +44 (0)1403 711447 Fax: +44 (0)1403 710155

web: www.turbosound.com

user manual

Impact 50

Impact 50 manual

page 2

CONTENTS

Introduction .................................................................................................................3

Unpacking the Impact 50 loudspeaker..................................................................3

Features .......................................................................................................................3

System Requirements ................................................................................................4

Amplifier Considerations............................................................................................5

Loudspeaker Connections ..........................................................................................5

Transformer Tap Settings ..........................................................................................6

Connecting Cables ......................................................................................................6

Positioning...................................................................................................................6

Installing the Impact 50 ..............................................................................................6

Maintenance................................................................................................................9

Removal of the low frequency driver....................................................................9

Removal of the high frequency tweeter................................................................9

Appendix A................................................................................................................10

Spares and Accessories .......................................................................................10

Mounting Hardware .............................................................................................10

Appendix B ................................................................................................................11

Technical Specifications.......................................................................................11

Appendix C ................................................................................................................12

Limited Warranty..................................................................................................12

user manual

Impact 50

Impact 50 manual

page 3

INTRODUCTION

Thanks

Thank you for choosing a TURBOSOUND IMPACT 50 series loudspeaker product

for your application. Please spare a little time to read the contents of this

manual, so that you can obtain the best possible performance from this 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

information is available on our web site at www.turbosound.com. We look

forward to helping you in the near future.

The Impact 50 loudspeaker has been designed to give you the best in audio

quality and many years of reliable, trouble free operation. It offers superior

audio quality, décor–matching colour options, integral mounting hardware

options, full technical documentation including EASE data, and a comprehensive

warranty against manufacturing defects. Please read through this manual

carefully before you attempt to operate the loudspeaker system. It contains

valuable information enabling you to quickly and easily connect the

loudspeakers to your amplifiers, important system and set–up checks together

with positioning and mounting instructions.

Unpacking the Impact 50 loudspeaker

After unpacking the unit please check carefully for damage. If damage is found,

please notify the carrier concerned at once. You, the consignee, must instigate

any claim. Please retain all packaging in case of future re-shipment.

FEATURES

•The Impact 50 cabinet is manufactured in injection–moulded high density

polypropylene for a tough, durable and stylish finish.

•A range of colour options includes TurboBlue™, black, or white to match any

venue requirement.

•Weather-resistant and constant voltage versions are available.

•Enclosures may be permanently installed using the supplied WB-50 wall

bracket or optional Turbosound wall and ceiling brackets.

•Spring–loaded, colour–coded push terminals are provided on a recessed rear

panel to allow for input and loop–through connections.

user manual

Impact 50

Impact 50 manual

page 4

PRODUCT DESCRIPTION

The Impact 50 is an ultra–compact passive sound reinforcement loudspeaker

designed for applications wherever a very small enclosure is required to

reproduce sound. The Impact 50 drive units are a 5” high efficiency low/mid

transducer and a 1” ferrofluid-cooled soft dome tweeter. It includes an internal

second order high pass filter network designed to give a very clean transition

between the two drive units while ensuring that the tweeter is protected from

harmful low frequency signals.

The Impact 50 is intended for fixed installations and as such is supplied as

standard with the WB-50 adjustable wall mounting bracket, allowing horizontal

and vertical adjustment.

The constant voltage version (Impact 50T) has been designed for use in 70 volt

and 100 volt distributed systems where long cable runs, and a large number of

loudspeaker units, make the use of a low impedance speaker impractical. The

internal line transformer is a high quality type offering wide bandwidth and

three power taps.

A weather-resistant option is available for use outdoors or under conditions of

high humidity. It is supplied with a rust–proof grille and stainless steel fixings.

SYSTEM REQUIREMENTS

The Impact 50 is a passive loudspeaker system. This means that it requires only

one amplifier channel for correct operation, the frequency splitting between the

low frequency driver and the high frequency driver being accomplished by the

internal passive crossover network built into each enclosure.

Passive subwoofer enclosures may be used in conjunction with the Impact 50 in

order to extend the frequency range from the system. The TSB-110, a dual–coil,

two–channel band–pass subwoofer, is recommended for this purpose. When

using the TSB-110, additional power amplifiers are not required since the

subwoofer contains passive crossovers for both left and right channels, allowing

up to eight Impact 50 speakers to be connected as satellite units.

If subwoofer enclosures are used in a bi–amplified system in conjunction with

Impact 50 enclosures, additional amplifier channels and external electronic

crossovers will be required. The LMS-D4 loudspeaker management system is

recommended for this purpose.

user manual

Impact 50

Impact 50 manual

page 5

AMPLIFIER CONSIDERATIONS

Turbosound speaker enclosures should be driven by high quality power

amplifiers designed for professional use. Such amplifiers will have balanced

inputs, DC and RF fault protection, 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

amplifier 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:

The amplifier's rated r.m.s. continuous power output (20Hz

–

20kHz,

per channel) should be equal to the program power handling of the

loudspeaker at its nominal 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 more likely to cause loudspeaker

damage—the total energy in a heavily clipped signal is far higher than in an

unclipped signal—than operating a more powerful amplifier within its specified

ratings.

LOUDSPEAKER CONNECTIONS

The Impact 50 is provided with a recessed connector panel housing a pair of

colour–coded, spring–loaded push terminals. These are used for input and loop–

out connections to further Impact 50 enclosures. Note that looping out to

additional enclosures has the effect of reducing the total load impedance on the

amplifier. For example, two 16 ohm cabinets in parallel give a combined total

impedance of 8 ohms. It is possible to connect four Impact 50 cabinets in parallel

to one amplifier channel, providing that amplifier is capable of delivering long

term power output into 4 ohms. Never connect loudspeakers to a power

amplifier whose total combined impedance is lower than the amplifier’s

recommended minimum load impedance.

user manual

Impact 50

Impact 50 manual

page 6

TRANSFORMER TAP SETTINGS

The constant voltage Impact 50T is fitted with a 4–way input connector. Always

connect the speaker cable corresponding to the negative terminal on the

amplifier to the blue terminal. The cable corresponding to the positive terminal

should be connected to one of the following terminals:

70 volt line 100 volt line

RED 30W 200 ohms 60W 200 ohms

YELLOW 15W 400 ohms 30W 400 ohms

GREEN 7.5W 800 ohms 15W 800 ohms

BLUE Common terminal Common terminal

CONNECTING CABLES

Good quality loudspeaker cable should always be used throughout the

installation, with a minimum wire size of 12 gauge (1.5mm2), and preferably 10

gauge (2.5mm2) for longer runs, keeping the run as short as possible. This helps

to avoid wasting amplifier power in the resistance of the cable. High cable

resistance also lowers the

damping factor

of the amplifier that affects its ability

to control loudspeaker cone movement.

POSITIONING

The Impact 50 has been designed with a rear facing port, which reinforces the

low frequency response of the speaker. Increased low frequency performance

can be achieved by placing the Impact 50 near to a wall. Even greater benefit is

achieved if the unit is placed in a corner. The optimum distance from the rear of

the enclosure to the wall is between 30–100 mm. Using the WB-50 adjustable

mounting bracket will ensure the loudspeaker is located at an ideal distance

from the wall.

INSTALLING THE IMPACT 50

The enclosure may be installed using a variety of different methods:

♦Using the WB-50 wall bracket supplied,

which allows for horizontal and vertical

adjustment. Disassemble the WB-50 bracket

and attach the speaker plate to the Impact 50

using the M6 screws provided. Attach the

wall plate at the desired position and then

re–assemble the bracket, tightening the

thumbwheel after positioning the speaker to

give the desired coverage.

user manual

Impact 50

Impact 50 manual

page 7

♦Attaching to a scaffold bar or to a

microphone stand by means of the SM-50

single point mount bracket. For microphone

stand use simply remove the microphone clip

from the mic stand and locate the threaded

end through the hole in the top of the SM-50

bracket. Tighten with the wing nut provided.

For use with a scaffold bar, place the bracket

over the bar and tighten with the supplied M6

screw until secure.

♦Fixing to a wall or ceiling using the SB-50 swivel

bracket. When used vertically as shown attached

to a wall, the enclosure is free to rotate in the

horizontal plane over more than 180°. It can also

be turned through 90°and mounted horizontally

on to a wall in which case the enclosure can be

tilted downwards to give the desired coverage.

The SB-50 can also be fixed to a ceiling, again

allowing for a wide range of adjustment of the

enclosure.

The CB-50 cluster bracket enables

four Impact 50 enclosures to be

ceiling mounted in a 360°cluster

with fixed downward angle. It is

designed for use with 15mm

(1/2”) conduit (not supplied),

which carries the loudspeaker

cable to the enclosures.

In addition the IMPACT 50 can be

easily installed using WB-10 and CB-10 brackets.

user manual

Impact 50

Impact 50 manual

page 8

user manual

Impact 50

Impact 50 manual

page 9

MAINTENANCE

If either of the drive units in your IMPACT 50 cabinet should cease functioning

and need a replacement, you are advised to remove the faulty unit from the

cabinet and send it to a professional service centre authorised to recone and

repair Turbosound loudspeakers.

Removal of the low frequency driver

1. The loudspeaker grille is held in place by four plastic push rivets. These are

removed by placing a small flat blade screwdriver under the flange and

carefully lifting upwards. Set the grille aside for later re–assembly. Spare

rivets are supplied in the accessory pack with your product for re–fitting the

loudspeaker grille.

2. Undo the four screws holding the driver in place and carefully lift it out and

away from the cabinet. Make a note of the driver polarity for later

reconnection. Disconnect the cables from the drive unit and completely

remove the driver from the cabinet.

3. To reinstate the driver 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 high frequency tweeter

1. Remove the loudspeaker grille as described above and set the grille aside

for later re–fitting.

2. Undo the four screws holding the high frequency tweeter in place, and

carefully lift it out and away from the cabinet. Make a note of the driver

polarity for later reconnection. Disconnect the cables from the drive unit and

completely remove the driver from the cabinet.

3. To reinstate the high frequency tweeter, simply reverse the above procedure

making sure you observe the correct polarity when reconnecting the cables

back into the terminals of the drive unit.

user manual

Impact 50

Impact 50 manual

page 10

APPENDIX A

Spares and Accessories

LS-50 5” (127mm) low frequency driver

TW-51 1” (25mm) high frequency tweeter

PX-50 Passive crossover network

MG-50 Metal grille

Mounting Hardware

WB-50 Adjustable wall bracket (supplied)

SM-50 Single point mount

SB-50 Swivel bracket

CB-50 Cluster bracket

CB-10 Ceiling bracket

WB-10 Wall bracket

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