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Drivers:

HF

25mm (1")

25mm (1")

MF

75mm (3")

75mm (3")

LF

2 x 314mm (12")

2 x 375mm (15")

Amplitude Linearity ±2dB

60Hz - 12kHz

50Hz - 12kHz

Cut-off Frequencies
(-6dB free standing)

32Hz & 20kHz

25Hz & 20kHz

Cut-off Frequencies
(-6dB soffit mounted)

25Hz & 20kHz

20Hz & 20kHz

Dispersion:

Horizontal

±80° Coherent

±80° Coherent

Vertical

±10° Coherent

±10° Coherent

Max Continuous SPL 

118dB SPL @ 1 metre

121dB SPL @ 1 metre

Cabinet Dimensions (HxWxD)

830 x 730 x 440mm

884 x 925 x 460mm

Overall Weight

116kg (255.2lb)

140kg (308lb)

Cabinet Finishes

Standard real wood veneers are available in Black Ash, Mahogany, Cherry and
Natural Oak. Other veneers and finishes can be supplied to special order.

SCM200/300ASL/P4

7

Specifications comply with the following standards: Australian Standard

Specification No 1127 "Sound System Loudspeakers" Part 5, IEFE Specification

Standard No 219-1975

ATC reserves the right to vary products and specifications without prior notice.

Acoustic Transducer Co. is a trading name and ATC is the registered trade mark

of Loudspeaker Technology Ltd.

SCM200ASL

SCM300ASL

P4

S p e c i f i c a t i o n s

Amplifier Output:

LF1

275 Watts RMS into 8 Ohms

LF2

275 Watts RMS into 8 Ohms

MF

200 Watts RMS into 16 Ohms

HF

100 Watts RMS into 6 Ohms

Input Connector

Male XLR

Input Sensitivity

1.0V Balanced

Input Impedance

>10k Ohms

Amplitude response

5Hz  - 20kHz ±0.1dB

Signal/Noise Ratio

Better than 105dB

Crosstalk

Better than 90dB

Crossover Frequency

380Hz and 3.5kHz

Filters

Even order critically damped

Overload Protection

Active FET Momentary Gain Reduction on all amplifiers

Power Requirements:

Voltage

100, 115, 230V (factory set)

Frequency

50/60Hz

Power Consumption

150VA (standby minimum) 1200VA (maximum)

Dimensions

19 inch rack mountable (5U high)

Overall depth

545mm

Front panel & handles

75mm

Rear handles

40mm

Amplifier body

430mm

Overall Weight

40kg (88.2lb)

Summary of Contents for P4

Page 1: ...SCM200 SCM300 P4 User Manual SCM200ASL SCM300ASL P4 POWER AMPLIFIER MULTICHANNEL A C O U S T I C E N G I N E E R S ...

Page 2: ...nstructions or as marked on the appliance 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 Unatt...

Page 3: ...ten 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 ...

Page 4: ...the amplifier is in standby mode until the heatsink temperature has dropped to approximately 20 C When a P4 is switched from standby to active operation a mild thump may be heard from the unit as the main power transformer energises In order to avoid excessive in rush current if multiple P4s are connected to a single power outlet it is recommended that they are switched to active mode sequentially...

Page 5: ...ustrated in Diagram 1 Custom made 5 metre speaker cables and plugs are supplied as standard with the P4 Speaker cables of up to 10 metres are available Runs up to 20 metres may be made up by splicing heavier gauge 4mm2 cable to 10 metre lengths The splice point should be 0 5 metres before the connector The 8 pin speaker connector scheme is illustrated in Diagram 2 6 S i g n a l C a b l e O p t i o...

Page 6: ...in 5 5 Volts on any error including drive limit Note Pins 3 4 and 5 have a series resistance of 240 Ohms and allow sensing or drive of LED s only 5 O p e r a t i o n Diagram 5 remote interface Pin Connection 1 0 Volt 2 Standby control 3 Powered up out 4 Standby out 5 Error out 8 S t a r t U p Once the P4 and monitors are installed and all connections are made the system can be switched on Switch o...

Page 7: ...ed sound The SCM200 and 300 like all ATC monitors demonstrates 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 SCM200 or 300 to produce sufficient sound pressure levels for your ears themselves to become a source of distortion ...

Page 8: ...Standard No 219 1975 ATC reserves the right to vary products and specifications without prior notice Acoustic Transducer Co is a trading name and ATC is the registered trade mark of Loudspeaker Technology Ltd SCM200ASL SCM300ASL P4 S p e c i f i c a t i o n s Amplifier Output LF1 275 Watts RMS into 8 Ohms LF2 275 Watts RMS into 8 Ohms MF 200 Watts RMS into 16 Ohms HF 100 Watts RMS into 6 Ohms Inpu...

Page 9: ...U S T I C E N G I N E E R S 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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