Page 1: ...Australian Monitor PROFESSIONAL AUDIO POWER AMPLIFIERS CONTRACTOR and opof Audio Amplifiers OPERATION MANUAL ...
Page 2: ... service the unit Only qualified and knowledgeable personnel familiar with the intemal wo kings of the unit should attempt any repair servicing or authorized modification to the unit NO USER SERVICEABLE PARTS INSIDE The unit does not contain any parts which the user can service or re use in this or any other product lf you are in need of special assistance and the informa tion you require is outsi...
Page 3: ...angers Well regulated high current power supply Efficient front to back cooling High VA capable toroidal mains transformer Single speed automatic axial fans Binding post output connection Output fault indication Stereo or bridged mono operation Plug in signal processors optional lnput signal XLR and tag strip connector High quality close olerance components 21 Position detented attenuators through...
Page 4: ...mprises a balanced active inputwith a buffered attenuator driving a differentialclass 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 capable linear power supply The Contractor Opal and pA Series are 2 units tall 3 5 in 19 wide rack mountable cases These units have been specifically designed to deliv...
Page 5: ...are Contrac tor Series C300 2x C600 2x C800 2x C1200 2 x 175W 300w 400w 600w 4 ohms 4 ohms 4 ohms 4 ohms Opal Series Opal 1202 Opal 2802 PA Series PA 3 PA 6 PA 8 PA 12 2x 2x 2x 2x 2x 2x 175W 4 ohms 300W 4 ohms 175W 4 ohms 300W 4 ohms 400W 4 ohms 600W 4 ohms c600 o g ol lr fu Austanan Monitor N OD Contractor Series Opal Series Figure 2 Front Panel Layouts Aushalian Monitor tu ...
Page 6: ...on and receiving mains power ln the advent of a thermal overload this LED will tum red indicating that the internal operating tempera ture of the amplifier has exceeded a safe level of operation and that the amplifier has shut down The fans will continue to run and once the amplifier has had a cooFdown period the unit will restart auto matically providing inrush cunent suppression and input muting...
Page 7: ...blemsintormation in the Operatlon section of this manual 8 Binding Post Outputs Binding posts banana jacks are provided for speaker output termination with banana plugs spade type lugs or bare wire The red post is used as positive and the black post is used as negative 9 Mains Lead Connector I E C Your amplifier is supplied with a IEC mains lead power cord appropriately rated for the mains sup ply...
Page 8: ...ontrols Connectors Figure 3 Rear Panel Layouts o tlt __lt tlt t 0 0 lt tL rill ffi 10 m lQlQl ol a4lt l io lU lUlUl ol l z I ourour l tt l E F r r rd t t c h i a A l _ Outp t ffi BS d I o Opal PA Series tu ...
Page 9: ...mounting flange will accept boll diameters up to 1 4 6 35mm We recommend that you provide additional support for the amolifier especially if road use is planned as the amplifier s weight can bend some racks This support can be provided by secure shelving support rails or rear panel support brackets Cooling Allamplifiers are cooied by an axialfan which draws cool airfrom the front of the unit and e...
Page 10: ...l ground for shielding purposes This is usefulwhen further isolation of signal grounds is required between source and destina tion eg to help in reducing earth loop noise or noise induced into signal grounds from stray magnetic fields OutputWiring When wiring to your speakers always use the largest gauge wire your connector will accept The longer the speaker lead the greater the losses will be res...
Page 11: ...Installation 11 C8 A LFFT OR cH 8 FlrcsT SPE AK ON CHA CH A L SPEAKON Figure 4 Neutik Speakon Connector wiring SINGLE NNECTION BRIDGEDCO NECTION DUAL CONIGCNON Australian Monitor tu ...
Page 12: ...re it will accept signal The lnrush Cunent Supression lCS circuit is in operation for the tirsl 0 5 seconds This limits the mains cunent to prevent nuisance tripping of circuit breakers caused by high starl up cunents The ICS circuit also operates a 30dB inputmute After two seconds this mute willrelease allowing any applied input signal to pass unattenuated When switching the amplifier OFF wait a ...
Page 13: ...flowing through the wire produces a voltage drop due to lhe wire s resistance This voltage ditference between the ampllier earth and source equipment earth appears to the amplifier s input as an input signal and is amplified as hum There are thr ee things you can do to avoid earth loop problems 1 Ensure your niains power for the audio system is quiet i e without equipment on il such as air conditi...
Page 14: ...e lhe conect voltage power requirements for a sPecific load Each amplifier can deliver the listed voltage into a load of I ohms c300 PA3 OPAL 1202 c600 PA6 OPAL 2802 c800 PA8 c1200 I PA12 35V 70v 80v 100v c _ c c_ _ C As shown in the diagram there are three steps in setting up your amplifier for running in BRIDGE mode Whilst the amplitier is OFF 1 Connect the signal source lo the channel A female ...
Page 15: ...ximum 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 Your amplifier is designed to be able to deliver more than twice the curent than that shown on the specification sheet to cope with difficult loads and or high energy ...
Page 16: ...e subject to oxidization in some environments Removing and re installing the fuse will help renew the contact surface You should replace the fuse if the element is sagging or discoloured When checking for a failed fuse do not rely on visual inspection alone You should use an ohmmeter to check continuity Fans Due to the openness ofthe air path through your amplifier very little dust should settle w...
Page 17: ...o refuse warranty service where the ownerfails to take reasonable care in use and maintenance of the amplifier To validate this wananty the original purchaser must complete and mail the wananty registration card to Aus tralian Monitor at the above address within fourteen days of purchase To obtain warranty service the equipment should be shipped to an aulhorised Australian Monitor dealer or to Aus...
Page 18: ...0Hz 20kHz 5Hz 95kHz 15 milliohm typical 500 IMD SMPTE 60 Hz 7 kHz 4 1 0 015 IMD CCIF 14 kHzl 15 kHz 1 1 0 008 Frequency Response Output Impedance 1kHz Damping Factor 1 kHz I ohm load Input Impedance Line to Line Balanced 25 kohm Input Sensitivity At rated output into 8 ohms 1 2V 3 8dBu At rated output into 4 ohms 1 0v 2 3dBu Input CMRR 1kHz Voltage Gain 1kHz Output Rise Time 20 kHz square wave 127...
Page 19: ...nse 0 5 0 15 dB 3dB Output Impedance 1kHz Damping Factor 1 kHz 8 ohm load 930W 900w 1200w 1400w 800w 700w 0 005 0 015 0 008 20Hz 29kHz 5Hz 95kHz 15 milliohm typical 500 typical Input Impedance Line to Line Ealanced Input Sensitivity At rated output into 8 ohms At rated output into 4 ohms Input CMRR l kHz Voltage Gain r kHz Output Rise Time 20 kHz square wave 145vpp leading edge Slew Rate 20 kHz sq...
Page 20: ...4 ohms THD 1 kHz 860W 1020W 510W 500w lkHz Voltage Gain lkHz 80 dB 31 dB 37x Output Rise Time 0 005 20 kHz square wave 127vpp 2 4 pS leading edge Slew Rate 20 kHz square wave 1 7vpp 4zvllts leading edge IMD SMPTE 60 Hz I 7 k z 4 11 0 01 5 IMD CCIF 14 kHz I 15 kHz t 1 0 008 Frequency Response Signal Noise ratio 0 5 0 15 dB 3dB 20Hz 20kHz 5Hz 95kHz linear 30 kHz A weighted Crosstalk 1kHz 100 dB 104 ...
Page 21: ...1400w At rated output into 8 ohms At rated output into 4 ohms 1 23V 4dBu 1 1V 3dBu 80 dB 33 dB 45 x 2 4 sS Input CMRR lkHz Voltage lkHz Gain 1200w 800w 700w Output Rise Time 0 005 0 015o a 0 008 20Hz 20kHz 5Hz 95kHz 15 milliohm typical 500 typical 20 kHz square wave 14SVpp leading edge Slew Rate 20 kHz square wave 145vpp leading edge 50V pS Signal Noise ratio Frequency Response linear 30 kHz A wei...
Page 22: ...sponse 0 5 0 15d8 3dB Input Sensitivity At rated output into 8 ohms 120W 120W 340W 175W 160W Input CMRR 1kHz Voltage 1kHz Gain 0 005 0 005 0 008 20 Hz 20kHz 5 Hz 95kHz Output Rise Time 20 kHz square wave 1 13Vpp leading edge Slew Rate 20 kHz square wave 145vpp leading edge 35V pS Output Impedance Signal Noise ratio 1kHz Damping Factor 1 kHz I ohm load 15 milliohm typical 250 1 linear 30 kHz A weig...
Page 23: ... 5i 0 15 dB 3dB Input Sensitivity At rated output into I ohms 215W 200w 560W 300w 280W Input CMRR 1kHz Voltage Gain 1kHz 0 005 0 015 0 008 20 Hz 20kHz 5Hz 95kHz Output Rise Time 20 kHz square wave 1 13vpp leading edge Slew Rate 20 kHz square wave 145vpp leading edge 35V pS Output Impedance 1kqz Damping Factor 1 kHz 8 ohm load 15 milliohm typical 250 1 Signal Noise ratio linear 30 kHz A weighted Cr...
