EM Acoustics AQ-3 User Manual Download Page 17

AQ-3 Operating Instructions

 

        

Page 17

 

www.emacoustics.co.uk 

Looking After Your Amplifier:  Maintenance 

 

These maintenance instructions are for use by qualified personnel only.  Before any routine 
maintenance,  please  ensure  that  your  amplifier  is  disconnected  from  the  mains  supply! 

 
The filter behind the air intake apertures on the front of your amplifier should be cleaned or 
replaced  periodically,  e.g.  3-6  months.  (Filters  in  amplifiers  located  in  more  'dirty' 

atmospheres may require more frequent maintenance).  
 

The  filter  should  be  'dry'  cleaned,  using  a  vacuum  cleaner  preferably.  Running  the  unit 
without  a  filter  is  not  recommended  unless  it  is  within  a  'clean  room'.  Replacement  filter 
material is available. 

 
If the fan vents on the rear of the amplifier develop  a build-up of dust/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 will damage the paint finish and could remove printing. 
 

If you have any doubts about carrying out maintenance, please refer to a service engineer or 
contact your local dealer. 

 
 

Looking After Your Amplifier:  Warranty 

 

Your amplifier is guaranteed for a period of three (3) years from the date of purchase.  We 
hope that it gives you many more years of reliable service than this, but should anything go 

wrong,  please  contact  us  to  advise  you  about  repairs  or  any  spares  you  might  require. 
 

Please do not attempt to repair the amplifier yourself as doing so will invalidate the warranty. 
  
Our contact details are: 

 
EM Acoustics Loudspeakers 

Building 74 
Dunsfold Park 

Cranleigh 
Surrey 
GU6 8TB 

 
Tel:  +44(0)1483 266520 

Fax:  +44(0)1483 275619 
 
email:  

[email protected]

 for general enquiries 

 
 

 

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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