SCM50
SCM100
SCM150
MU LTI CH AN NEL
®
SCM110
SCM25A Pro
User Manual:
Passive:
Active:
. SCM50ASL . SCM100ASL . SCM110ASL . SCM150ASL
. SCM50SL . SCM100SL . SCM150SL
SCM25A Pro . SCM45APro
SCM45A Pro
1
S a f e t y W a r n i n g s
1. Read instructions – all the safety and operating instructions should be read
before the appliance is operated.
2. Retain these instructions – the safety and operating instructions should be
retained for future reference.
3. Heed warnings – all warnings on the appliance and in the operating
instructions should be adhered to.
4. Follow instructions – all operating and other instructions should be
followed.
7. Heat – the appliance should be situated away from heat sources such as
radiators, stoves or other appliances that produce heat.
9. Power cord protection – power supply cords should be routed so that they
are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience
receptacles and the point where they exit the appliance.
10. Cleaning – the appliance should be cleaned only as recommended by the
manufacturer.
11. Unattended periods – the power cord of the appliance should be
unplugged from the outlet when left unused for a long period of time.
12. Object entry – care should be taken so that objects do not fall into the
appliance.
13. Damage requiring service – the appliance should be serviced by qualified
service personnel when:
i. the power supply cord or the plug has been damaged
ii. objects have fallen or liquid has been spilled into the appliance
iii. the appliance has been exposed to rain or other serious liquid exposure
iv. the appliance does not appear to operate normally or exhibits a marked
change in performance
v. the appliance has been dropped or the cabinet damaged
14. Servicing – the user should not attempt to service the appliance beyond
those measures described in the operating instructions.All other servicing
should be referred to qualified service personnel.
15. Grounding or polarisation – precautions should be taken so that grounding
or polarisation means for the appliance are not defeated.
5. Water and moisture - the appliance should not be exposed to dripping or
splashing and no objects such as vases, should be placed on the appliance.
6. Ventilation - a minimum 0f 80mm is required at the rear of the appliance
to ensure sufficient ventilation.The ventilation should not be impeded by
covering the appliance with items such as table-cloths,curtains etc. Further,
the appliance should not be built into an installation, such as a bookcase or
cabinet, that may impede the flow or air around the appliance.
8. Power sources -The appliance is of Class1 construction and shall be
connected to a MAINS socket outlet with a protective earthing connection
16. The Mains disconnection switch is located on the rear panel. Pressing the
switch downwards will turn the unit on.The unit can be turned off by upward
pressure on the switch. Please allow enough room around the unit to ensure
the switch is readily operable when the unit is in use.
SCM 50/100/ 15025/45/ 110/
Welcome.In selecting ATC you have chosen an
example of the finest audio engineering
available. ATC was founded on a principle of
engineering excellence, and that principle still
defines our products today. Given the right
oppor tunities, ATC products will deliver
exceptional audio performance, but the
opportunities will only arise from careful and
thoughtful installation and use. Please read the
following manual fully. It will help you
understand the product and to realise its full
potential. We are happy to answer questions
and offer advice on any issues that arise
through installation or use of ATC products.
Contact details can be found at the back of this
manual.
ATC was founded in London in 1974 by Australian emigre Bill Woodman, who still
heads the company today. An enthusiastic pianist and engineer he was naturally
drawn to loudspeaker design and after a period working at Goodmans, where many
of the names that went on to found British loudspeaker companies began their
careers, he struck out on his own.The premise on which ATC began is a simple one,
and one that in many respects is still true today: hi-fi loudspeakers tend to be
detailed and accurate but of limited dynamic range, while professional monitor
speakers tend to express the opposite character. ATC products were designed from
the outset to offer the best of both. It’s an easy concept to describe, but surprisingly
difficult to engineer.
The difficulty inherent in designing such loudspeakers is one of scale. Hi-fi levels of
accuracy and detail call for lightweight moving parts and delicate engineering.
Professional monitor levels of performance however demand far more robust
components engineered to survive the rigours of high level use for extended
periods.The only way to combine the two is through precision engineering of a class
and scale more often associated with aerospace or motorsport. But the results are
worth the effort and the cost. ATC loudspeakers, with their unique in-house
designed drivers, combine the best of hi-fi and professional to devastating effect.
ATC has become synonymous with active systems. Choosing to offer active
loudspeakers (where the passive crossover network is replaced by active filters and
multiple power amplifiers) is simply a result of the uncompromising attitude to
loudspeaker design.While passive systems still have their place, and ATC engineering
skills can still bring remarkable results from them, “active” is a fundamentally better
solution to the problems posed by accurate, high level music reproduction.The ATC
instinct is always for the better solution. Not cheaper, not quicker, but better.
It was the development of active loudspeakers that first brought ATC into
electronics design and engineering. Active speakers demand multiple power
amplifiers so ATC from the mid 1980s became not just a loudspeaker manufacturing
company but an electronics manufacturer too.The further step from electronics for
active speakers to a range of stand-alone amplifier products was natural and now
means that ATC engineering is available from the recording desk or CD player
output to the ears.
From modest beginnings ATC has grown to become one of the very few
manufacturers successful across both domestic and professional audio. By selecting
ATC you join a group of music lovers, professional audio engineers, studios and
musicians across the World that understand and value the engineering that goes into
an ATC product - and the sound that comes out.
I n t r o d u c t i o n
2
SCM 50/100/ 15025/ 110/
SCM 50/100/ 15025/ 110/
SCM 50/100/ 15025/45/ 110/
C o n te n t s
Section Unpacking and Handling2
Section Monitor Placement3
Section Signal Cable Options5
Section 1 Description
Page 2
Page 3
Page 4
Page 5
Page 7
Page 8
Introduction
Active Monitors
Section Listening4
Passive Monitors
Section Connection7
Section Operation6
Specifications
Section Amplification9
Section Connection8
Section 11
Section 10
Care and Maintenance
Warranty and Contact
Page 6
Connections and controls
Specifications
Active Monitors
Passive Monitors
3
I n s t a l l a t i o n
2 . U np a c k i n g a nd H a n d li n g
• Open the carton and remove all loose items.
• The speaker can now be positioned in the
• Remove the baffle protector.
• Carefully lift the loudspeaker out from the
lower Sratocell foam cap using the handles
The SCM25, 45, 50, 100, 110 and 150 are large heavy items
• Remove the upper Sratocell foam cap.
• Remove the polythene or cloth bag, leaving
the baffle protector in place.
and the port opening as lifting points.
listening/control room
3 . M on i t o r P l a c em e n t
The subjective performance of any monitor loudspeaker will be influenced by the
acoustic character of the room in which it is used, and its position within the room.
Most often monitors are installed in rooms which are comfortable to sit and talk in.
A mixture of carpets, curtains and soft furnishings will help ensure that middle and high
frequencies are reasonably well controlled. There may however be low frequency
problems; either too much or too little bass. To minimise low frequency problems
the monitors should be kept away from corners or walls. Start with them positioned
on appropriate stands 1 metre from the side walls and 2 metres from the back wall
back walls. for fine tuning rather than to compensate forUse the Bass Boost control
innapropriate positioning. For stereo listening, loudspeakers should be positioned
to experiment with both the listening and speaker position until a good compromise
In professional installations, try to avoid placing speakers on the console/desk meter
bridge. Typically, this compromises the balance of the loudspeaker especially in the
lower mid range. If the balance is bass light, the monitors can be moved towards the
so they form an equilateral triangle with the listening position (See Fig.1).
Loudspeaker stand height should be chosen to position the loudspeaker
acoustic axis at, or close to ear level (See Fig.2). All rooms vary and it is a good idea
is reached. For professional installations the requirements are often very specific.
Please consult with an experienced professional acoustician if necessary. Monitors
Monitors with an asymmetric (offset) driver array should be positioned such that the
midrange driver and tweeter are inboard. If the monitors are to be placed in any form
of cabinet, adequate side and top clearance for cooling airflow must be provided.
Alternatively, the Amplifiers should be removed and installed remotely. All ATC 3-way
loudspeakers are designed with the mid-range dome as the reference acoustic axis.
With this in mind, the loudspeakers should be positioned with the mid-range dome
at, or slightly below ear level (See Fig.3).
1 . D es c r i pt i o n
The SCM25/45/50/100/110 and 150 are a range of three
way loudspeakers. All of the range, excluding the SCM25
and SCM45 are available as passive or active units.
Passive monitors are equipped with a “tri-wire” connection
panel to enable separate amplification of the bass, mid
and high frequency drivers. Active units have a built in
three way Amplifier with frequency, gain and phase
correction which has been individually optimised at the
ATC manufacturing facility. Adjustment of input sensitivity
and bass boost are available to the user via controls
on the rear panel of the unit.
and should be handled with care. Always employ a
second person to assist in moving them. Unpacking is best
carried out on the floor, with adequate open space
around the carton, preferably close to their final position.
30°
30°
distance x
distance y
distance z
distance x = distance y = distance z
Loudspeaker Positioning - Stereo
Fig. 1
Reference acoustic axis
Position at ear level or up
to 5 degrees above ear level
Fig.2
4 . L is t e n in g
The ear and brain tend to interpret distorted sound as loudness and thus
underestimate the actual level of undistorted sound. The SCM , 10025 45, 50, , 110
and 150, like all ATC monitors, demonstrate very much lower levels of distortion
than conventional systems of a similar size and it is therefore advisable to begin listening
at an artificially low level and carefully increase the volume. It is also possible for the
SCM , 100 and 150 to produce25 45, 50, , 110 sufficient sound pressure levels for
your ears make the sound appearthemselves to become a source of distortion and
harsh, Any or your ears are beingaudible distortion indicates that either the system
overloaded and that the volume level should be reduced.
SCM 50/100/ 15025/45/ 110/
The SCM25 and SCM45 are only available as active
units. The product name suffix denotes the technology
featured in the product.
denotes that the Loudspeaker includes active amplification.
“SL” denotes Super Linear Magnet technology and “A”
Phono (RCA)
Connector
To Source Output
Two Core Screened Cable
3 Pin Male XLR
Connector
To Monitor Input
1
2
3
Hot
Screen
Return
Two Core Screened Cable
3 Pin Male XLR
Connector
3 Pin Female XLR
Connector
To Monitor Input
Hot
Return
Screen
To Source Output
1
2
3
1
2
3
5 . S ig n a l C ab l e O p t io n s
Balanced cable configuration is the preferred option,
however unbalanced connection is possible. Diagrams 2 and
3 illustrate the signal cable connections required for
each option. Balanced (XLR to XLR) connection offers
lower noise and better immunity to “hum” pick-up.
Unbalanced (XLR to Phono or Two pole Jack)
connection carries risk of hum caused by multiple
signal earths. Hum problems resulting from unbalanced
connection may be reduced by making ONE of the
following modifications to the signal cable
connections: If the driving preamplifier (or desk) is
“double insulated” (i.e. has no mains earth),
disconnect the signal cable screen at the RCA Phono
plug end. Alternatively, disconnect the signal cable
screen at the XLR end.This second option will make
the source the reference signal earth.
6 . O pe r a t io n
Diagram 4 illustrate the connection and controland 5 panels for the Amplifiers
used in the active monitors. Each feature is described below.
5.1
Mains Inlet:
The supplied mains power lead (appropriate to the local
territory) should be connected here. Ensure that the mains voltage specified on
the panel corresponds with the local supply voltage.
5.2 Power Switch:
Switches on the monitor When. switched on the indicator
on the switch will illuminate.
5.3 Fuseholder:
Should a monitor fail to switch on when the power switch is
operated the fuse should be inspected. Lift out the fuseholder cover using a
small flat-blade screwdriver th efuse and inspect it for damage. Ifremove
required a replacement fuse should be fitted, . It should be stressed however that
fuses most most electrical fault. If this is theoften fail only because of a serious
case then simply replacing the in another fuse failure. Thefuse will only result
monitor should be returned to ATC if a second fuse fails.
5.4
Input Socket:The audio signal cable should be connected here. Balanced or
or unbalanced cables may be used (See Section 3).
5.5
Bass Boost:
Provides up to 6dB of gain (3dB for the SCM25 and SCM45)
in the region of 40Hz. Use a small flat blade screwdriver to access the control.
Adds more warmth and energy to the lower frequencies in music,
at the expense of accurate transient reproduction.
Note:
Adjusting the bass boost without the ability to recalibrate may leave a
pair of monitors unmatched.
5.6
LevelTrim : Provides access to an internal control that enables
adjustment of input sensitivity. Use a small flat blade screwdriver to access the
control. As supplied, monitors are calibrated to an input sensitivity of 1V.
Note:
Adjusting the sensitivity without the ability to recalibrate will leave a pair
of monitors unmatched.
Due to the nature of the electronics in ATC active loudspeakers it is quite normal
for a sound to be heard from the speaker when the power is applied or
disconnected. The noise heard will not damage the speaker and is quite normal.
Although ATC uses the highest-grade components, a different noise may be heard
from each speaker due to slight tolarance variations in the amplifier components.
4
Active monitors
7 . C on n e c ti o n
Two cable connections are required for each monitor: one for mains power and one
for the audio signal. The mains cable is specifically supplied to comply with local
statutory safety approvals and alternatives should not be substituted. If you intend to
use your monitors in an alternative territory please contactATC for advice.The mains
connection must always be earthed.
The signal cable and plug (not necessarily supplied) should be of a good quality and
XLR terminated. Poor cable and plug quality will compromise the performance of
your monitors.The signal input pin configuration is illustrated in Diagram 1.
Diagram 1 - input connection pins
Pin 1, Screen
Pin 2, Signal (hot)
Pin 3, Signal (return)
2 1
3
PUSH
Diagram 2 - balanced cable
Diagram 3 - unbalanced cable
SCM 50/100/ 15025/45/ 110/
I n s t a l l a t i o n
left
centre
right
left
side
right
side
left
rear
right
rear
distance L
distance C
distance R
distance LS
distance RS
distance LR
distance RR
150°
110°
150°
30°
30°
110°
sub
5
8 . C on n e c ti o n
Passive Monitors
9 .A mp l i fi c a t io n
Loudspeaker Positioning - 5.1 & 7.1 Surround
• All loudspeakers should be equi-distant from the listening position:
distance L = distance C = distance R = distance LS = distance LR = distance RR
• For 5.1 systems, position the ‘surround’ speakers between 110 and 150 degrees
• If ideal positioning is not possible, position loudspeakers as close as possible
• Try to avoid placing the subwoofer on the mid-point between two walls
• For more details on setting up surround playback or monitoring systems
please contact you dealer or ATC direct.
The monitors are equipped with a “tri-wire” connection
panel to enable separate amplification of the bass driver
mid driver and tweeter. Remove the linking bars between
the three pairs of terminals if you wish to take advantage
of the tri-wire facility.
The terminals can accomadate either stripped cable ends
or 4mm plugs: Always use good quality speaker cable with
a 2.5mm minimum cross sectional area per conductor
(79 strand). Cable of smaller cross sectional area or fewer
strands is unsuitable. For cable runs longer than 10m use
a significantly heavier gauge cable. Consult your dealer or
consultant for specific cable recommendations.
Ensure that the positive and negative terminals on each
connection panel are connected back to the corresponding
positive and negative terminals on the amplifier
The choice of partnering amplifier for the monitors will
have significant influence on the performance of the system.
Consider the following when selecting the amplifier:
• With any passive loudspeaker there is a trade-off between
low frequency extension and sensitivity. The monitors
extended low frequency response means that its sensitivity
is relatively low. It is advisable therefore to select an
amplifier of relatively high power capabilities. Use of an
under specified amplifier will result in the system sounding
distorted at high levels and may risk damage. Valve or solid
state amplifiers with high output impedance should be
auditioned carefully to establish that their characteristic
reduced damping at low frequencies is acceptable.
• Thanks in part to Super Linear technology and underhung
voice coil construction, the monitors not only demonstrate
extremely low distortion at all levels but also a greatly
enhanced effective dynamic range. This exceptional
distortion performance, also combined with very wide
dispersion, will ruthlessly reveal deficiencies in ancillary
equipment. It is advisable therefore to audition the monitors
with your proposed amplifier and ancillary system.
to ideal
SCM 50/100/ 15025/45/ 110/
3-way systems
acoustic axis: 5 belowº
mid-range driver
acoustic axis: mid point between
bass/mid and tweeter
2-way systems
I n s t a l l a t i o n
6
I n s t a l l a t i o n
Diagram 4 - connection and control panelSCM25A and SCM45A Pro
Acoustic Transducer Co. Is a trading name and
Is the registered Trade Mark of LoudspeakerTechnology Ltd.
Designed and manufactured by
Acoustic Transducer Company
Gloucestershire GL6 8HR
England
RETURNTO
MANUFACTURER
FOR DISPOSAL
serial no.
Input sensitivity
(full output)
2v/8.2dBu
1v/2.2dBu (ref.)
NO USER SERVICEABLE PARTS INSIDE
model
voltage
can only be safely used in non-tropical weather
can only be safely used lower than 2,000 metres altitude
2000m
MAINS INPUT
50/60 Hz
CONSUMPTION
POWER
425WATTS MAX.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOTOPEN
THIS EQUIPMENT
MUSTBE EARTHED
1:
2:
3:
CHECKVOLTAGE BEFORE USE
fuse:
115V :T6.3A H/250V
220 - 230V :T3.15A H/250V
115/220 - 230V
WARNING
Tri - AmpPack
High Performance
Active Loudspeaker
+3dB
0dB (ref.)
bass boost
CONSUMPTION
MAINS INPUT
50/60 Hz
POWER
625WATTS MAX.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOTOPEN
WARNING
THIS EQUIPMENT
MUSTBE EARTHED
!
AcousticTransducer Co. Is a trading name and
Is the registeredTrade Mark of Loudspeaker Technology Ltd.
Designed and manufactured by
Acoustic Transducer Company
Gloucestershire GL6 8HR
England
RETURNTO
MANUFACTURER
FOR DISPOSAL
serial no.
+6dB 0dB (ref.)
bass boost
Input sensitivity
(full output)
2v/8.2dBu
1v/2.2dBu (ref.)
balanced input
NO USER SERVICEABLE PARTS INSIDE
CHECKVOLTAGE BEFORE USE
model
fuse:
115V :T5A H/250V
220 - 230V :T3.15A H/250V
100/115/220 - 230V
100V :T6.3A H/250V
voltage
2000m
fault
can only be safely used in non-tropical weather
can only be safely used lower than 2,000 metres altitude
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan
Apparatet må tilkoples jordet stikkontakt
Apparaten skall anslutas till jordat uttag
Tri - AmpPack
High Performance
Active Loudspeaker
2 1
3
PUSH
Diagram - connection and control panel5 SCM50/100/110/150
SCM 50/100/ 15025/45/ 110/
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan
Apparatet må tilkoples jordet stikkontakt
Apparaten skall anslutas till jordat uttag
7
Drivers:
HF
MF
LF
Amplitude Linearity ±2dB
Cut-off Frequencies
(-6dB free standing)
Matched Response
Dispersion:
Horizontal
Vertical
Max Continuous SPL @ 1metre
Crossover Frequencies
Input Connector
Input Sensitivity
Sensitivity Trim
Input Impedance
Amplifier Output:
LF continous
MF continous
HF continous
Overload Protection
Bass Boost (40Hz continously variable)
Loudspeaker Dimensions
OverallWeight
Power Requirements:
Voltage
Frequency
Stands/Brackets
Cabinet Finishes
SCM50ASL SCM100ASL SCM150ASLSCM25A Pro SCM110ASL
25mm (1")
75mm (3")
234mm (9")
70Hz – 1 kHz7
38Hz & 2 kHz5
±0.5dB
±80° Coherent
±10° Coherent
1 dB09
200 Watts
100 Watts
50 Watts
Active omentary Gain Reduction on all .peak m channels, r.m.s. power limiter on h.f. channels
0 to +6dB
71 x 3 x 4806 51
49kg (107. lb)8
100, 115, 230V220 -
50/60Hz
Floor stands included with Hi-Fi products only
All products: Standard real wood veneers are available in Black Ash,Mahogany,Cherry and Natural Oak.
Other veneers and finishes can be supplied to special order.
25mm (1")
25mm (1")
25mm (1")
25mm (1")
75mm (3")
75mm (3")
75mm (3")
75mm (3")
314mm (12")
164mm (6.5")
234mm (9")
±0.5dB
±0.5dB
±0.5dB
±0.5dB
47Hz & 22kHz
60Hz - 17kHz
65Hz - 17kHz
7 Hz – 1 kHz4 7
65Hz - 17kHz
32Hz & 25kHz
25Hz & 25kHz
32Hz & 25kHz
±10° Coherent
±10° Coherent
±10° Coherent
±10° Coherent
±80° Coherent
±80° Coherent
±80° Coherent
±80° Coherent
112dB
115dB
117dB
115dB
380Hz and 3.5kHz, 4th order, critically damped with phase compensation
Female XLR
1V rms (0dBV/1.1dBu) balanced (referenced to full output)
0 to -6dB
10k Ohms per leg
150 Watts
60 Watts
25 Watts
200 Watts
200 Watts
200 Watts
100 Watts
100 Watts
100 Watts
50 Watts
50 Watts
50 Watts
832 x 398 x 581
884 x 498 x 628
716 x 626 x 501
264 x 430 x 414
65kg (143lb)
73kg (160.6lb)
75kg (165.3lb)
30.0kg (66lbs)
115/220 - 230V
Internally set
Internally set
Active Monitors
375mm (15")
SCM 50/100/ 15025/45/ 110/
S p e c i f i c a t i o n s
SCM45A Pro
25mm (1")
75mm (3")
164mm (6.5")
70Hz – 1 kHz7
42 5Hz & 2 kHz
50/60Hz
±0.5dB
±80° Coherent
±10° Coherent
1 dB12
150 Watts
60 Watts
25 Watts
0 to +3dB
353 x 600 x 414
36.0kg (79.2lbs)
(
(
)
)
(HxWxD)mm
Specifications comply with the following standards: Australian Standard Specification No 1127 "Sound System Loudspeakers" Part 5,
IEFE Specification Standard No 219-1975
E. & O.E. The policy of ATC is that of coninuous design and development. alterATC reserves the right to products and specifications without prior notice.
Acoustic Transducer Co. is a trading name and ATC is the registered trade mark of Loudspeaker Technology Ltd.
Pro
Pro
Classic
Tower
49kg (107. lb)8
65kg (143lb)
75kg (165.3lb)
53 16 8kg (1 . lb)
68kg (149.9lb)
77kg (169.8lb)
(HxWxD)in.
10.4 x 16.9 x 16.3
13.9 x 23.6 x 16.3
28.2 x 13.8 x 18.9 32.8 x 15.7 x 22.9 28.2 x 24.6 x 19.7 34.8 x 19.6 x 24.7
Classic
Tower
71 x 3 x 4806 04
832 x 398 x 581
884 x 498 x 647
1020 34x 3 x 480
1167 x 428 x 581
1139 x 528 x 647
40.2 x 13.2 x 18.9
28.2 x 12.0 x 18.9
45.9 x 16.9 x 22.9
32.8 x 15.7 x 22.9
44.8 x 20.8 x 25.5
34.8 x 19.6 x 25.5
1 0 . C a r e a nd M a i n te n a nc e
High technology material finishes are used in this product.The surfaces are durable
and with a little care can be kept as good as new even under conditions of heavy
use. Normally a dry duster will be all that is required to keep the finishes clean.
Heavy soiling can be cleaned using a cloth slightly moistened with a non-abrasive
household cleaner.
There are no components within the speaker that can be considered expendable,
or that would benefit from regular maintenance. There is no requirement for any
kind of routine service work and there is no schedule for preventative maintenance.
There are no user replaceable parts within the speaker and in the unfortunate event
of any malfunction, repair should be referred to either the supplying dealer or
consultant, the relevant importer, or ATC.ATC has every confidence in the quality
of each product that it manufactures.
SCM 50/100/ 15025/ 110/
8
Input Connector
Binding Posts/4mm Sockets (Tri-Wire capable)
Sensitivity @ 1 Watt/metre
85dB
Nominal Impedance
8 ohms
Recommended Power Amplifier:
100 - 1500 Watts
Passive Monitors
Drivers:
HF
MF
LF
Amplitude Linearity ±2dB
Cut-off Frequencies
(-6dB free standing)
Matched Response
Dispersion:
Horizontal
Vertical
Max Continuous SPL @ 1 metre
Crossover Frequencies
OverallWeight
Stands/Brackets
Cabinet Finishes
SCM50SL
SCM100SL
SCM150SL
234mm (9")
70Hz – 1 kHz7
38Hz & 2 kHz5
41 90.4kg ( lb)
Floor stands included with Hi-Fi products only
All products: Standard real wood veneers are available in Black Ash,Mahogany, Cherry and Natural Oak.
Other veneers and finishes can be supplied to special order.
25mm (1")
25mm (1")
25mm (1")
75mm (3")
75mm (3")
75mm (3")
314mm (12")
±0.5dB
±0.5dB
±0.5dB
60Hz - 17kHz
65Hz - 17kHz
32Hz & 25kHz
25Hz & 25kHz
±10° Coherent
±10° Coherent
±10° Coherent
±80° Coherent
±80° Coherent
±80° Coherent
112dB
115dB
117dB
380Hz and 3.5kHz, 4th order, critically damped with phase compensation
57.0kg (125.7lb)
68kg (149.9lb)
374mm (15")
9 dB1
88dB
1 1 . W a rr a n ty a nd C o n t a c t
All ATC products are guaranteed against any defect in
materials or workmanship for a period of two years
from th date of purchase. Within this periode we will
supply replacement parts free of charge provided that
Purchasers who complete and return the
extended up to a period of six years from the
date of purchase.This guarantee does not limit
ATC can be contacted at:
Loudspeaker Technology Ltd, Gypsy Lane, Aston
Down, Stroud, Gloucestershire GL6 8HR, UK.
Telephone: 01285 760561
Fax: 01285 760683
Email: info@atc.gb.net
Website: www.atc.gb.net
the failure was not caused by misuse, accident or
negligence.
Warranty Card will have their warranty period
statutory rights.
Classic
Tower
4 kg ( . lb)5 99 2
61kg (134.5lb)
70kg (154.3lb)
Specifications comply with the following standards: Australian Standard Specification No 1127 "Sound System Loudspeakers" Part 5,
IEFE Specification Standard No 219-1975
E. & O.E. The policy of ATC is that of coninuous design and development. alterATC reserves the right to products and specifications without prior notice.
Acoustic Transducer Co. is a trading name and ATC is the registered trade mark of Loudspeaker Technology Ltd.
Loudspeaker Dimensions
(HxWxD)mm
(HxWxD)in.
Classic
Tower
71 x 3 x 46 04 25
832 x 398 x 526
884 x 498 x 592
1020 34 25x 3 x 4
1167 x 428 x 526
1139 x 528 x 592
40.2 x 13.2 x 16.7
28.2 x 12.0 x 16.7
45.9 x 16.9 x 20.7
32.8 x 15.7 x 20.7
44.8 x 20.8 x 23.3
34.8 x 19.6 x 23.3
Loudspeaker Technology Ltd, Gypsy Lane, Aston Down, Stroud, Gloucestershire GL6 8HR United Kingdom
Telephone 01285 760561 Fax 01285 760683
Email: info@atc.gb.net Website: www.atc.gb.net
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