Turbosound 50T, 50 User Manual

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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

Issue 3.0 © 2004 Turbosound Ltd.

user manual

 

Impact 50

 

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

Impact 50 manual page 2

user manual

Impact 50

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.

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Impact 50

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.

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Impact 50

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 (20Hz20kHz,

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.

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Impact 50

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.

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Impact 50

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.

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Impact 50

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Impact 50

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.

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Impact 50

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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Impact 50

APPENDIX B

Technical Specifications

 

IMPACT 50

IMPACT 50T

Type

2-way passive

2-way passive

 

loudspeaker

loudspeaker

Components

5” LF, 1” HF tweeter

5” LF, 1” HF tweeter

Enclosure type

Optimally ported

Optimally ported

 

enclosure

enclosure

Frequency response

90Hz22kHz ±4dB

90Hz22kHz ±4dB

Constant voltage taps

N/A

70V: 30W/15W/7.5W

 

 

100V: 60W/ 30W/15W

Impedance

16 ohms (nominal)

N/A

Sensitivity

88dB @ 1 watt, 1 metre

88dB @ 1 watt, 1 metre

Maximum SPL

110dB cont, 116dB peak

110dB cont, 116dB peak

Crossover type

Second order high pass

Second order high pass

 

filter network using

filter network using

 

polypropylene

polypropylene

 

capacitors and air

capacitors and air

 

spaced inductors

spaced inductors

Crossover frequency

4 kHz

4 kHz

Connectors

Spring loaded push

Spring loaded push

 

terminals

terminals

Enclosure material

Polypropylene mix with

Polypropylene mix with

 

acoustically optimised

acoustically optimised

 

filling material

filling material

Finish

Textured finish,

Textured finish,

 

available in blue, black,

available in blue, black,

 

or white

or white

Size (H x W x D)

288mm x 167mm x 148mm

288mm x 167mm x 148mm

Net weight

2.2kg (4.4lbs)

3.8kg (8.4lbs)

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

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Impact 50

APPENDIX C

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 materials and workmanship. It does not include:

damage caused by accident, misuse, abuse, neglect or modification by any other person other than an authorised Turbosound representative,

damage caused by overdriving, use with unsuitable amplifiers or amplifier failure,

damage caused by failure to operate the product in accordance with the instructions contained in the user’s manual,

damage occurring during shipment in transit,

claims based upon any misrepresentations by the seller,

products which do not have the original components as specified 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 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: Customer Service), Star Road, Partridge Green, West Sussex RH13 8RY, England, or your local authorised Turbosound representative. The product serial number must be quoted in all correspondence relating to the claim. Insurance is recommended, as Turbosound or its 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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Impact 50

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, injury 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: +44 (0)1403 711447 Fax: +44 (0)1403 710155

web: www.turbosound.com

Impact 50 manual page 13