EM Acoustics AQ-3 User Manual Download Page 8

AQ-3 Operating Instructions

  

 

    Page 8

 

 

 

 

 

 

 

Installing Your Amplifier:  Electrical Considerations 

 

The amplifier has been manufactured to comply with your local power supply requirements, 

but before connecting the unit to the supply, ensure that the voltage (printed on the rear 
panel) is correct. 

 
The amplifier is fitted with either a 100/120V or 220/240V tapped transformer according to 

customer requirements. 
 
Make sure power outlets conform to the power requirements listed on the back of the unit. 

Damage caused by connecting to improper AC voltage is not covered by the warranty. 
 

SAFETY WARNING 

 

Where a MAINS plug or appliance coupler is used as the disconnect device, it should remain 

readily operable. 
 

Where the amplifier is mounted in a rack and permanently connected to the mains, then the 
rack should be installed with a readily accessible connector or an ALL POLE circuit breaker 
with 3mm breaking distances.  

 
This unit is fitted with a 3-wire power cord.  

For safety reasons,  

 

THE EARTH LEAD SHOULD NOT BE DISCONNECTED IN ANY CIRCUMSTANCE

.  

 
If ground loops are encountered consult the section on connecting your amplifier on page 11. 

 
The wiring colours are: 

 
230V AREAS:  EARTH = GREEN AND YELLOW   

120V AREAS:  EARTH = GREEN 

 

 

NEUTRAL = BLUE  

 

 

 

 

NEUTRAL = WHITE 

 

 

LIVE = BROWN   

 

 

 

 

LIVE = BLACK 

 

 
DO NOT USE THE UNIT IF THE ELECTRICAL POWER CORD IS FRAYED OR BROKEN. The 

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 and plugs and the 
point where they exit from the appliance. 

 
ALWAYS OPERATE THE UNIT WITH THE AC GROUND WIRE CONNECTED TO THE 

ELECTRICAL SYSTEM GROUND. Precautions should be taken so that the means of grounding 
of a piece of equipment is not defeated. 
 

DO NOT REMOVE THE LID. Removing the lid will expose you to potentially dangerous 
voltages. There are no user serviceable parts inside. 

 

ESD strikes to the unit’s front panel that are in excess of 4000 volts may cause disturbance to 
the status LEDs on the unit. This will not affect audio performance and will be corrected on 

the next power up cycle. 
 

Summary of Contents for AQ-3

Page 1: ...EM Acoustics Loudspeakers Building 74 Dunsfold Park Cranleigh Surrey GU6 8TB UK www emacoustics co uk AQ 3 amplifier User Manual v1 0...

Page 2: ...AQ 3 Operating Instructions Page 2...

Page 3: ...plifier Performance Measurements Error Bookmark not defined Connecting To Your Amplifier Inputs 10 Connecting To Your Amplifier Speaker Outputs 11 Connecting To Your Amplifier Bridged Mono Operation 1...

Page 4: ...408990 Type Designation E4 75 and all OEM variants of this model are manufactured in accordance with EMC Directive 2004 108 EC in compliance with the following norm s or document s Technical Regulatio...

Page 5: ...ducts Your AQ 3 power amplifier utilises proprietary designed load impedance sensing output circuitry which enables the amplifier to drive the high voltage swings associated with speaker impedances of...

Page 6: ...d ensure that no objects filled with liquids such as vases are placed on the equipment To completely disconnect this equipment from the AC mains disconnect the power cord from the mains circuit breake...

Page 7: ...empli des liquides comme les vases n est plac sur l quipement Pour compl tement d brancher cet quipement de la conduite principale de courant alternatif d branchez la corde de pouvoir du disjoncteur d...

Page 8: ...cord For safety reasons THE EARTH LEAD SHOULD NOT BE DISCONNECTED IN ANY CIRCUMSTANCE If ground loops are encountered consult the section on connecting your amplifier on page 11 The wiring colours are...

Page 9: ...m rack mounting systems ENSURE THERE IS ADEQUATE VENTILATION The cooling fans suck cool air in through the front and blow hot air out at the rear of the unit through the ventilating grills The front a...

Page 10: ...hould still be twin core plus screen PIN1 Screen connected to the chassis of the unbalanced equipment or left disconnected at the unbalanced end PIN2 Hot signal PIN3 Cold ground 0V NOTE This amplifier...

Page 11: ...t as above There must be no shared connections between channels Negative output terminals must not be joined together as they are not both at ground potential Connecting them together will damage the...

Page 12: ...ir C D The method is the same for both channel pairs Supply signal to Channel A or C input only and push in the appropriate rear panel switch marked BRG A B or BRG C D Use Channel A or C s Output Spea...

Page 13: ...LED This indicates if the channel is linked to its immediate neighbour The link switches are on the rear panel see page 15 for details 6 PRC LED This illuminates if the Power Reduction Control has be...

Page 14: ...smoky environment it should be cleaned of any collected debris at regular intervals Please also see the notes regarding maintenance on page 17 It is important that the power output of your amplifier...

Page 15: ...k all outputs to input A press all three switches IN and use input A only The front panel attenuators will still operate independently when channels are linked Bridged mono switch A B Press this switc...

Page 16: ...mode the minimum impedances are 8 ohms Note 1 Negative ve output terminals must not be joined together since they are not both at 0V 2 Because the currents involved are very high the speaker cables sh...

Page 17: ...t debris on the finger guards they can be cleaned with a dry paintbrush and a vacuum cleaner The casework of the amplifier may be cleaned with a lightly dampened cloth do not use any solvents as they...

Page 18: ...ity into 4 ohms NOTE Factory setting is normally link 1 2 32dB gain Setting higher gain does not change the maximum available power but changes the level of signal input to achieve maximum power In an...

Page 19: ...62 Boxed shipping 12 62 Additional Specifications Parameter Units AQ 3 Input Impedance Active Balanced Ohms 20k Input CMRR dB 60 SNR dB 105 Damping Factor 1kHz 8 ohms 400 Signal Limiters Present Yes...

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