AUSTRALIAN MONITOR IS1200 Installation And Operation Manual Download Page 1 | Manualshive

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Clever Features, Contractor Friendly

IS600

IS1200

Stereo Professional Audio Amplifiers

Installation

&

Operation Manual

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Summary of Contents for IS1200

Page 1: ...Clever Features Contractor Friendly IS600 IS1200 Stereo Professional Audio Amplifiers Installation Operation Manual ...

Page 2: ...1200 delivers 600 watts per channel 4 ohms Designed for permanent installations where high quality audio reproduction is required on a small budget the IS series deliver the sound quality features contractors require The IS series continues the Australian Monitor tradition of delivering an amplifier packed with clever features at a contractor friendly price ...

Page 3: ...on Stereo or Parallel operation Balanced inputs and buffered attenuators Signal Present indication Output clip indication Efficient front to back cooling Twin speed axial fans Thermal fault indication Signal ground lift switch Protection Features Short circuit protection Overload protection Soft Start Thermal protection ...

Page 4: ...ied and knowledgeable personnel familiar with the internal workings of the amplifier should attempt any repair servicing or authorized modification to the amplifier The amplifier does not contain any parts which the user can service or re use in this or any other product If you are in need of special assistance and the information you require is outside the scope of this manual please contact your...

Page 5: ...two levels of operation These levels are Below clip level unlit Clipping above red The LED will change to red once the output exceeds the clipping point of the amplifier s output stage The threshold is referred to the amplifier supply rails and alters with changes in the mains supply changes in the load and duty cycle fluctuations The attack and decay time ballistics of the status circuit are thos...

Page 6: ... on and down for power off At start up turn on the input to the amplifier is muted for approximately two seconds 4 Protect Indicator This red LED will illuminate when thermal shutdown occurs 5 Active Indicator This LED will illuminate blue and indicates that the amplifier is ON and receiving AC mains power 6 Signal Indicator This LED displays the status of the output stage and varies in intensity ...

Page 7: ...phase Ring Cold inverting or reverse phase Sleeve Signal Ground 9 Input Sensitivity Switch This switch allows the amplifiers input sensitivity to be correctly matched to the equipment providing the amplifiers input signal See the Operation section page 12 for more details 10 Parallel Stereo Switch This switch determines whether channels A B are receiving separate signals i e Operating in stereo mo...

Page 8: ...nector for bi amp applications Channel A is considered the dominant channel and has both channels wired to the speaker connector See the installation section of this manual for detailed information on speaker connector wiring 13 Mains Fuse The IS600 is fitted with a 8 amp slow blow fuse the IS1200 is fitted with a 15 amp slow blow fuse 14 Mains Connection Your amplifier is fitted with an internati...

Page 9: ...axial fan which draws cool air from the front of the amplifier and expels heated air out the rear of the amplifier These amplifiers include two speed fans which normally run at half speed switching to full speed when the internal heatsink temperature exceeds 500C An unrestricted airflow into and out of the amplifier must be provided Any restriction of the air flow will cause heat to build up withi...

Page 10: ...ing the pins in the input connector or by the source equipment s output wiring When wiring for an unbalanced source Pin 1 GROUND SHIELD Pin 2 HOT in phase with the amplifier s output Pin 3 GROUND SHIELD joins to pin 1 NOTE In line XLR connectors often have a termination lug that connects directly to the chassis of the connector Do not link this lug to pin 1 at the amplifier s input as it will defe...

Page 11: ... has the advantage of minimising connections preserving phasing and simplifying channel allocation which is particularly important when bi amping IMPORTANT Do not overload your amplifier by connecting the channel B output twice Channel A is used as the dominant channel and when sourcing a dual output from Channel A the following standard should be used Channel A Left or Low Frequencies Channel B R...

Page 12: ... on When you power up your IS Series your amplifier goes through an initialising period before it will accept signal The Inrush Current Suppression ICS circuit is in operation for the first 0 5 seconds This limits the mains current to prevent nuisance tripping of circuit breakers During this period you will hear a couple of relays click indicating mains is now directly applied to the amplifier and...

Page 13: ...quipment and to a safety earth in an electrically noisy environment problems may occur The three E s of hum and hum related noise which can plague your audio system are a Electrostatic radiation b Electromagnetic radiation and c Earth loops Electrostatic radiation capacitively couples to system elements causing an interference voltage that mainly affects higher impedance paths such as amplifier in...

Page 14: ...rth at one end only Signal Ground Lift Switch When proper system hook up has been made you may still have some hum or hum related noise This may be due to any of the previously mentioned gremlins Your IS Series amplifier has a Signal Ground Lift switch which disconnects the input ground wiring from the amplifier A substantial drop in hum and or hum related noise can result from the judicious use o...

Page 15: ... of the fan blades and reduce their cooling efficiency The time taken for this to happen will depend on the environment and the amount of use The fan blades are accessible 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 Many users stall the fan and use compressed air to blow the dust off the fan blades It is important to n...

Page 16: ...mpedance 20Kohm Signal noise ratio 99dB 20Hz 20kHz Weight 16 5KG Dimensions wxdxh 483mm x 452mm x 89mm IS1200 Specifications Output 8 ohms 2 x 400 watts Output 4 ohms 2 x 600 watts Frequency Response 10Hz 50kHz 3dB THD 0 03 1kHz Crosstalk 60dB Slew Rate 12 v ms Damping Factor 250 into 8 ohms 125 into 4 ohms Input Impedance 20Kohm Signal noise ratio 105dB 20Hz 20kHz Weight 20 5KG Dimensions wxdxh 4...

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