IMPACT 50
IMPACT 50T
IMPACT 50S
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 2.0 © 2001 Turbosound Ltd.
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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 digest 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
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
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The Impact 50 cabinet is manufactured in injection-moulded high density
polyethylene for a tough, durable and stylish finish.
A range of colour options includes TurboBlue, black, grey or white to
match any venue requirement.
Magnetically shielded, weatherproof 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.
Impact 50 manual
page 3
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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 14mm liquid cooled polymer dome tweeter. It includes an
internal first 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 Impact 50S is a magnetically shielded version, and may be safely used for
multi-media applications in close proximity to television screens and computer
monitors.
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 tappings.
A weatherproof 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 Impact 110.2, a dual-
coil, two-channel band-pass subwoofer, is recommended for this purpose.
When using the Impact 110.2, additional power amplifiers are not required since
the subwoofer contains passive crossovers for both left and right channels,
allowing 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 Turbosound TMC-T1000 power amplifier and
the LMS-A6 loudspeaker management system are recommended for this
purpose.
Impact 50 manual
page 4
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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 (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.
Impact 50 manual
page 5
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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
30W
100 volt line
60W
RED
200 ohms
400 ohms
800 ohms
200 ohms
400 ohms
800 ohms
YELLOW
GREEN
BLUE
15W
30W
7.5W
15W
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:
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Using the WB-50 wall bracket supplied,
which allows for horizontal and vertical
adjustment. Dis-assemble 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.
Impact 50 manual
page 6
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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.
Impact 50 manual
page 7
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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.
Impact 50 manual
page 8
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Impact 50
APPENDIX A
Spares and Accessories
LS-50
TW-50
PX-50
MG-50
5” (127mm) low frequency driver
0.5” (14mm) high frequency tweeter
Passive crossover network
Metal grille
Mounting Hardware
WB-50
SM-50
SB-50
CB-50
Adjustable wall bracket (supplied)
Single point mount
Swivel bracket
Cluster bracket
Impact 50 manual
page 9
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Impact 50
APPENDIX B
Technical Specifications
IMPACT 50
IMPACT 50S
IMPACT 50T
Type
2-way passive
loudspeaker
2-way passive
loudspeaker
2-way passive
loudspeaker
Components
5” LF, 0.5” HF tweeter
5” LF, 0.5” HF tweeter
5” LF, 0.5” HF tweeter
Enclosure type
Optimally ported
enclosure
Optimally ported
enclosure
Optimally ported
enclosure
Frequency response
Constant voltage taps
100Hz – 20kHz ±4dB
N/A
100Hz – 20kHz ±4dB
N/A
100Hz – 20kHz ±4dB
100V: 50w (300 ohms);
25w (400 ohms); 12.5w
(800 ohms)
Impedance
16 ohms (nominal)
16 ohms (nominal)
N/A
Sensitivity
91dB @ 1 watt, 1 metre
114dB cont, 120dB peak
91dB @ 1 watt, 1 metre
114dB cont, 120dB peak
91dB @ 1 watt, 1 metre
114dB cont, 120dB peak
Maximum SPL
Crossover type
Fourth order high pass
filter network using
polypropylene
Fourth order high pass
filter network using
polypropylene
Fourth order high pass
filter network using
polypropylene
capacitors and air
spaced inductors
capacitors and air
spaced inductors
capacitors and air
spaced inductors
Crossover frequency
Connectors
4 kHz
4 kHz
4 kHz
Spring loaded push
terminals
Spring loaded push
terminals
Spring loaded push
terminals
Enclosure material
Finish
Polypropylene mix with
acoustically optimised
filling material
Polypropylene mix with
acoustically optimised
filling material
Polypropylene mix with
acoustically optimised
filling material
Textured finish,
Textured finish,
Textured finish,
available in blue, black,
grey or white
available in blue, black,
grey or white
available in blue, black,
grey or white
Size (H x W x D)
Net weight
288mm x 167mm x 148mm 288mm x 167mm x 148mm 288mm x 167mm x 148mm
2.2kg (4.4lbs) 2.5kg (5.5lbs) 3.5kg (7.7lbs)
Due to continuing product improvement the above specifications are subject to
change.
Impact 50 manual
page 10
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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:
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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,
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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.
Impact 50 manual
page 11
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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
Impact 50 manual
page 12
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