User Manual:
Contents
1. outlet with a protective earthing connection 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 II 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 16 The Ma2. 7 x 428 x 526 1139 x 528 x 592 40 2 x 13 2 x 16 7 45 9 x 16 9 x 20 7 44 8 x 20 8 x 23 3 Overall Weight Classic 4lkg 90 4lb 57 0kg 125 71b 68kg 149 9lb Tower 45kg 99 21b 61kg 134 5Ib 70kg 154 31b Stands Brackets Floor stands included with Hi Fi products only Cabinet Finishes Other veneers and finishes can be supplied to special order Specifications comply with the following standards Australian Standard Specification No 1127 Sound System Loudspeakers Part 5 IEFE Specification Standard No 219 1975 E amp O E The policy of ATC is that of coninuous design and development ATC reserves the right to alter products and specifications without prior notice Acoustic Transducer Co is a trading name and ATC is the registered trade mark of Loudspeaker Technology Ltd 10 Care and Maintenance 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
3. User Manual Active SCM25A Pro SCM45APro SCM50ASL SCMI00ASL SCMIIOASL SCMI50ASL SCM50SL SCMIOOSL SCMI50SL IZ TL MULTICHANNEL SCM45A Pro SCM25A Pro SCMS50 SCM100 SCM110 SCM150 SafetyWarnings SCM25 45 50 100 1 10 150 I 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 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 Of 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 7 Heat the appliance should be situated away from heat sources such as radiators stoves or other appliances that produce heat 8 Power sources The appliance is of Class construction and shall be connected to a MAINS socket
4. ance RR e For 5 1 systems position the surround speakers between 10 and 150 degrees If ideal positioning is not possible position loudspeakers as close as possible to ideal 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 3 way systems F ZIIT acoustic axis 5 below mid range driver 2 way systems acoustic axis mid point between bass mid and tweeter SCM25 45 50 100 1 10 150 Diagram 4 SCM25A and SCM45A Pro Installation connection and control panel bass 3dB o 0dB ref Input sensitivity full output 2v 8 2dBu o Iv 2 2dBu ref boost ars can only be safely used lower than 2 000 metres altitude can only be safely used in non tropical weather es o model serial no po Acoustic Transducer Co Is a trading name and ass Is the registered Trade Mark of Loudspeaker Technology Ltd Tri AmpPack High Performance Active Loudspeaker E Designed and manufactured by Acoustic Transducer Company Gloucestershire GL6 8HR England Laite on liitettava suojakoskettimilla varustettuun pistorasiaan Ap
5. cification No 1127 Sound System Loudspeakers Part 5 IEFE Specification Standard No 219 1975 E amp O E The policy of ATC is that of coninuous design and development ATC reserves the right to alter products and specifications without prior notice Acoustic Transducer Co is a trading name and ATC is the registered trade mark of Loudspeaker Technology Ltd SCM25 50 100 1 10 150 Passive Monitors Drivers SCM50SL SCMI00SL SCMI50SL HF 25mm 1 25mm 1 25mm 1 MF 75mm 3 75mm 3 75mm 3 LF 234mm 9 314mm 12 374mm 15 Amplitude Linearity 2dB 70Hz 17kHz 65Hz 17kHz 60Hz 17kHz Cut off Frequencies 6dB free standing 38Hz amp 25kHz 32Hz 8 25kHz 25Hz 8 25kHz Matched Response 0 5dB 0 5dB 0 5dB Dispersion Horizontal Vertical 80 Coherent 10 Coherent 80 Coherent 10 Coherent 80 Coherent 10 Coherent Max Continuous SPL metre 112dB 115dB 117dB Crossover Frequencies 380Hz and 3 5kHz 4th order critically damped with phase compensation Input Connector Binding Posts 4mm Sockets Tri Wire capable Sensitivity O Watt metre 85dB 88dB 91dB Nominal Impedance 8 ohms Recommended Power Amplifier 100 1500 Watts Loudspeaker Dimensions 716 x 304 x 425 832 x 398 x 526 884 x 498 x 592 Classi HxWxD mm has 28 2 x 120x167 328 x 15 7 x 20 7 34 8 x 19 6 x 23 3 HxWxD in Tower 1020 x 334 x 425 116
6. ction Warranty and Contact Introduction 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 synonymou
7. e of accurate transient reproduction Note Adjusting the bass boost without the ability to recalibrate may leave a pair of monitors unmatched 5 6 Level Trim 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 IV 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 7 Connection 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 contact ATC 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 c
8. ent sound pressure levels for your ears themselves to become a source of distortion and make the sound appear harsh Any audible distortion indicates that either the system or your ears are being overloaded and that the volume level should be reduced SCM25 45 50 100 1 10 150 Active monitors 5 Signal Cable Options 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 Diagram input connection pins Pin 2 Signal hot Pin I Screen Pin 3 Signal return Diagram 2 balanced cable 3 Pin Male XLR Connector 3 Pin Female XLR Two Core Screened Cable Connector To Monitor Input To Source Output Diagram 3 unbalanced cable 3 Pin Male XLR Connector Phono RCA C
9. he SCM25 45 50 100 1 10 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 The SCM25 and SCM45 are only available as active units The product name suffix denotes the technology featured in the product SL denotes Super Linear Magnet technology and A denotes that the Loudspeaker includes active amplification 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 2 Unpacking and Handling The SCM25 45 50 100 110 and 150 are large heavy items 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 Open the carton and remove all loose items Remove the upper Sratocell foam cap Remove the polythene or cloth bag leaving the baffle protector in place Carefully lift the loudspeaker out from the lower Sratocell foam cap using the handles and the port opening as lifting points The speaker can now be positioned
10. in the listening control room Remove the baffle protector Loudspeaker Positioning Stereo S distance z La Go i a San fg hn e o gg i E distance x distance y distance z 3 Monitor Placement 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 metre from the side walls and 2 metres from the back wall 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 back walls Use the Bass Boost control for fine tuning rather than to compensate for innapropriate positioning For stereo listening loudspeakers should be positioned so they form an equilateral triangle with the listening position See Fig l Loudspeaker stand height should be chosen to position the loudspeaker acoustic axi
11. ins 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 SCM25 45 50 100 1 10 150 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 opportunities 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 Contents Page 2 Introduction Section Description Page 3 Section 2 Unpacking and Handling Section 3 Monitor Placement Section 4 Listening Active Monitors Section 5 Signal Cable Options Section 6 Operation Section 7 Connection Passive Monitors Section 8 Connection Section 9 Amplification Connections and controls Active Monitors Specifications Passive Monitors Specifications Section 10 Care and Maintenance Se
12. onfiguration is illustrated in Diagram Installation SCM25 45 50 100 1 10 150 Passive Monitors 8 Connection 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 9 Amplification 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 s
13. onnector Two Core Screened Cable To Monitor Input To Source Output Installation 6 Operation Diagram 4 and 5 illustrate the connection and control 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 remove th efuse and inspect it for damage If required a replacement fuse should be fitted It should be stressed however that fuses most most often fail only because of a serious electrical fault If this is the case then simply replacing the fuse will only result in another fuse failure The 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 expens
14. ounding 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 Loudspeaker Positioning 5 1 amp 7 1 Surround y Y he ae st MS e qee del Pa Si e c E Ee Ui EA ER g e o S E Se Pd o R 2 FO Y DS Ny gel o o FIOS By age as a YUI 5 SO a No A y TA A i 4 za 2 A i Bo 4 1 ear hi e va A i a Da o a na a i POS oe er j Se p i s POR dise ae eb 6 Stan a aan g Rg toa S y Nr k E P i a E a NS O wy Y A Ss S Rs v oe 7 Fo A ROS 5 S y Ne el X 4 e 4 EO de Suo EN XE at IS Ta e TARDES RSS i A Pia we Cap om All loudspeakers should be equi distant from the listening position distance L distance C distance R distance LS distance LR dist
15. paratet m tilkoples jordet stikkontakt Apparaten skall anslutas till jordat uttag 115 220 230V fuse 115V T6 3A H 250V 220 230V T3 15A H 250V AN Ho WARNING MAINS INPUT 50 60 Hz Y POWER CONSUMPTION 425WATTS MAX CHECK VOLTAGE BEFORE USE RETURN TO MANUFACTURER C pal FOR DISPOSAL NO USER SERVICEABLE PARTS INSIDE E Tri AmpPack High Performance Active Loudspeaker Input sensitivity full output O bass boost O balanced input model Acoustic Transducer Company Apparaten skall anslutas till jordat uttag 2v 8 2dBu 1v 2 2dBu ref 6dB 0dB ref fault Designed and manufactured by A WARNING Gloucestershire GL6 8HR England A MAINS INPUT 100 1 15 220 230V Apparatet m tlkoples jordet stikkontakt 50 60 Hz Ay fuse Laite on liitett v suojakoskettimilla varustettuun pistorasiaan POWER 100V T6 3A H 250V CONSUMPTION 115V T5A H 250V 625WATTS MAX can only be safely used lower than 2 000 metres altitude can only be safely used in non tropical weather serial no voltage NY RETURNTO MANUFACTURER Xx C FOR DISPOSAL in Acoustic Transducer Co Is a trading name and 42 Is the registered Trade Mark of Lo
16. s at or close to ear level See Fig 2 All rooms vary and it is a good idea to experiment with both the listening and speaker position until a good compromise 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 Fig 2 Reference acoustic axis Position at ear level or up to 5 degrees above ear level 4 Listening The ear and brain tend to interpret distorted sound as loudness and thus underestimate the actual level of undistorted sound The SCM25 45 50 100 110 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 SCM25 45 50 100 110 and 150 to produce suffici
17. s 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 lt 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 Installation SCM25 45 50 100 110 150 Description T
18. 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 All products Standard real wood veneers are available in Black Ash Mahogany Cherry and Natural Oak II Warranty and Contact All ATC products are guaranteed against any defect in materials or workmanship for a period of two years from the date of purchase Within this period we will supply replacement parts free of charge provided that the failure was not caused by misuse accident or negligence Purchasers who complete and return the Warranty Card will have their warranty period extended up to a period of six years from the date of purchase This guarantee does not limit statutory rights 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 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
19. tts 100 Watts 100 Watts 100 Watts 100 Watts HF continous 25 Watts 25 Watts 50 Watts 50 Watts 50 Watts 50 Watts Overload Protection Active peak momentary Gain Reduction on all channels r m s power limiter on h f channels Bass Boost 40Hz continously variable O to 3dB 0 to 6dB Loudspeaker Dimensions Pro 264 x 430 x 414 353 x 600 x 414 716 x 351 x 480 832 x 398 x 581 716 x 626 x 501 884 x 498 x 628 HxWxD mm 10 4 x 16 9 x 16 3 13 9x 23 6x 16 3 28 2 x 13 8x 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 HxWxD in Classic 716 x 304 x 480 832 x 398 x 581 884 x 498 x 647 28 2 x 12 0 x 18 9 32 8 x 15 7 x 22 9 34 8 x 19 6 x 25 5 Tower 1020 x 334 x 480 1167 x 428 x 581 1139 x 528 x 647 40 2 x 13 2 x 18 9 45 9 x 16 9 x 22 9 44 8 x 20 8 x 25 5 OverallWeight Pro 30 0kg 66lbs 36 0kg 79 2lbs 49kg 107 8lb 65kg 143Ib 73kg 160 6lb 75kg 165 31b Classic 49kg 107 81b 65kg 143Ib 75kg 165 31b Tower 53kg 116 8lb 68kg 149 91b 77kg 169 8lb Power Requirements Internally set Internally set Voltage 115 220 230V 100 115 220 230V Frequency 50 60Hz 50 60Hz Stands Brackets Floor stands included with Hi Fi products only Cabinet Finishes 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 Specifications comply with the following standards Australian Standard Spe
20. udspeaker Technology Lid NO USER SERVICEABLE PARTS INSIDE CHECK VOLTAGE BEFORE USE 220 230V T3 15A H 250V Specifications Active Monitors SCM25 45 50 100 1 10 150 Drivers SCM25A Pro SCM45A Pro SCM50ASL SCMI00ASL SCMI IOASL SCMI50ASL HF 25mm I 25mm I 25mm 1 25mm 1 25mm 1 25mm 1 MF 75mm 3 75mm 3 75mm 3 75mm 3 75mm 3 75mm 3 LF 164mm 6 5 164mm 6 5 234mm 9 314mm 12 234mm 9 375mm 15 Amplitude Linearity 2dB 74Hz 17kHz 70Hz 17kHz 70Hz 17kHz 65Hz 17kHz 65Hz 17kHz 60Hz 17kHz Cut off Frequencies a 47Hz 8 22kHz 42Hz 8 25kHz 38Hz amp 25kHz 32Hz amp 25kHz 32Hz amp 25kHz 25Hz amp 25kHz 6dB free standing Matched Response 0 5dB 0 5dB 0 5dB 0 5dB 0 5dB 0 5dB Dispersion Horizontal 80 Coherent 80 Coherent 80 Coherent 80 Coherent 80 Coherent 80 Coherent Vertical 10 Coherent 10 Coherent 10 Coherent 10 Coherent 10 Coherent 10 Coherent Max Continuous SPL I metre 109dB 112dB 112dB 115dB 115dB 117dB Crossover Frequencies 380Hz and 3 5kHz 4th order critically damped with phase compensation Input Connector Female XLR Input Sensitivity IV rms 0dBV 1 I dBu balanced referenced to full output Sensitivity Trim O to 6dB Input Impedance 10k Ohms per leg Amplifier Output LF continous 150 Watts 150 Watts 200 Watts 200 Watts 200 Watts 200 Watts MF continous 60 Watts 60 Wa
Download Pdf Manuals
Related Search