AUSTRALIAN MONITOR KA1500 Operation Manual Download Page 1 | Manualshive

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KA1500

KA1500

KA1500

KA1500

KA1500

O p e r a t i o n M a n u a l

PROFESSIONAL AUDIO AMPLIFIER

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Summary of Contents for KA1500

Page 1: ...KA1500 KA1500 KA1500 KA1500 KA1500 O p e r a t i o n M a n u a l PROFESSIONAL AUDIO AMPLIFIER ...

Page 2: ...he boundaries of an equilateral triangle is intended to alert the user that dangerous uninsulated voltages may exist within the unit senclosure Thesevoltagesmaybeofasufficient magnitude as to constitute the risk of an electrical shock This symbol is reinforced with the text ThepresenceofanEXCLAMATIONMARKcontained within the boundaries of an equilateral triangle is intended to alert the user that t...

Page 3: ...t mains turn on Input muting at turn on Input overvoltage protection Radio frequency interference suppression Short circuit protection and indication 1 Watt output indication 2 828 volts 1 dB below output clip indication Massive heat sink heat exchangers Efficient front to back cooling Quad twin speed axial fans Multi role output fault indication Front carry handles Rear rack mount ears Plug in si...

Page 4: ...4 Operation 13 5 Bridge Mode 15 6 Two Ohm or Not Two Ohm 16 7 Maintenance 17 8 Warranty 18 9 Specification 19 List of Illustrations Page Figure 1 Block Diagram 5 Figure 2 Front Panel Layout 6 Figure 3 Rear Panel Layout 8 Figure 4 Case Dimensions 10 Figure 5 Speakon Connector Wiring 12 Figure 6 Bridge Mode Speaker Wiring 15 ...

Page 5: ...Figure 1 Amplifier Block Diagram Introduction 5 The KA KA KA KA KA Series amplifiers are 2 unit 3 5 tall 19 wide rack mountable units Each channel of the amplifier comprises a balanced active input with a buffered attenuator driving a differential class A drive stage which in turn drives a fan cooled class AB MOSFET output stage configured as a source follower The unit operates from a high current...

Page 6: ...6 Controls Connectors Figure 2 Front Panel Layout 2 Controls Connectors Indicators ...

Page 7: ...f your speakers try to keep clipping infrequent 3 Fault Indicator This amber LED will flash when a fault condition exists The fault detection circuit monitors the difference between drive and output in your amplifier If you have a short on the speaker output or a blown negative rail fuse the LED will flash brightly in sync with the programme This LED will also flash with programme peaks for gross ...

Page 8: ...8 Controls Connectors Figure 3 Rear Panel Layout ...

Page 9: ...opriately rated for the mains supply voltage marked on the rear panel of your amplifier Controls Connectors 9 The wires in the mains lead are colored in accordance with the following code BROWN ACTIVE BLUE NEUTRAL GREEN AND YELLOW EARTH Your unit must always be earthed 10 Mains Circuit Breaker A pushtoreset thermalcircuitbreakerissupplied on your amplifier providing overall protection of your ampl...

Page 10: ...Figure 4 Dimensions 10 Installation ...

Page 11: ...can be provided by secure shelving support rails or a rear rack mounting strip to match up with the rear rack mount ears provided on your amplifier Cooling Each channel of your KA1500 amplifier is cooled by twin axial fans which draw cool air from the front of the unit and expels the heated air from the rear of the unit These units offer two speed fans which run at half speed switching to full spe...

Page 12: ... to the chassis of the connector Do not link this lug to pin 1 at the amplifier s input as it will defeat the amplifier s input grounding scheme This lug is often referred to as a drain and is used to provide a termination to the chassis for shielding purposes when a floating signal ground is required between the source and destination or when disconnecting the signal ground is required to reduce ...

Page 13: ...ment period before it will accept signal The Inrush Current Supression ICS circuit is in operation for the first 0 5 seconds This limitsthemainscurrenttoprevent nuisance tripping of circuit breakers During this period the THERMAL ON LED will flash redwhilst the mains voltage gradually charges up the power supply You will then hear a relay click indicatingmainsisnowdirectlyappliedtotheamplifier and...

Page 14: ...gh the wire produces a voltagedropduetothewire sresistance Thisvoltage difference between the amp earth and source equipment earth appears to the amplifier s input as a signal and is amplified as hum There are three things you can do to avoid earth loop problems Ensure your mains power for the audio system is quiet i e without equipment on it such as air conditioning refrigeration or lighting whic...

Page 15: ... applicable load As shown inFigure 6 there are three steps in setting up your amplifier for running it in BRIDGE mode Whilst the amplifier is off 1 ConnectthesignalsourcetotheChannel Afemale input XLR The Channel A attenuator becomes the level control for both channels 2 Engage the push to bridge switch 3 Connect your load between the red binding post output terminals where the positive side of th...

Page 16: ... load for a sine wave at a given frequency Though this method is in line with the various standards that exist it only gives an indication to the maximum voltage swing before clipping for a given load This method of rating power does not give an indication of the current Ampere capability of the amplifier nor does it show the amplifier s ability to sustain high energy waveforms YourKA1500 KA1500 K...

Page 17: ...sible once the lids are removed and can be easily cleaned You need only hold the fan rotor still and wipe the dust off the blades Maintenance 17 Many users stall the fan and use compressed air to blow the dust off the fan blades It is important to note that the fan blades must be held still whilst blowing air over the blades otherwise you may burn out the bearings in the fan Fuses Along with rear ...

Page 18: ...mmediately after unpacking the product This card is to be sent DIRECTLY to Australian Monitor NOTE Warranty is effective ONLY upon receipt of this card COMPANY NAME MODEL ADDRESS SERIAL No DATE PURCHASED CITY DEALER STATE CODE COUNTRY of this manual Australian Monitor reserves the right to refuse warranty service where the owner fails to take reasonable care in use and maintenance of the amplifier...

Page 19: ...1 500W 2 000W Distortion 0 5 dB below clipping re 4 ohms THD N 1 kHz 0 01 IMD SMPTE 60 Hz 7 kHz 4 1 0 01 IMD DIM 30 3 15kHz square 15 kHz 0 01 Output Impedance 1 kHz 0 025 ohms Damping Factor 1 kHz re 8 ohms 350 1 Output Rise Time 3 5µS 80 leading edge of 20kHz square wave Slew Rate 60V per µS leading edge 20kHz square wave clipping Frequency Response 20 Hz 20 kHz 0 15 dB 3dB points 10 Hz 80 kHz I...

Page 20: ...ey Ph 02 9647 1411 Fax 02 9648 3698 E mail nsw audiotelex com au Melbourne Ph 03 9890 7477 Fax 03 9890 7977 E mail vic audiotelex com au Brisbane Ph 07 3852 1312 Fax 07 3252 1237 E mail qld audiotelex com au Adelaide Ph 08 8352 4444 Fax 08 8352 4488 E mail sa audiotelex com au Perth Ph 08 9228 4222 Fax 08 9228 4233 E mail wa audiotelex com au Auckland Ph 09 415 9426 Fax 09 415 9864 E mail audiotlx...

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