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UNPACKING 
 
Although the power amplifier is a rugged piece of professional audio equipment and is 
heavy, it is also a high specification modern electronic assembly and should be handled 
with care. 
 
The packaging of the unit is specifically designed to safely transport this product.  In the 
unlikely event of the product requiring servicing, this packaging is the safest way to 
transport it. 
 
All units are factory set for 230v operation. 
Units factory made for 110/120V supply are clearly marked on the back and should 

not 

be 

connected to any higher voltage power source. 
 

SITING THE POWER AMPLIFIER 

 
This power amplifier  has been designed for rack mounting use, in a Racking enclosure 
made to  BS5954, IEC297 or Din 41494 standards.  
 
a.  The unit must be mounted in the horizontal position with clear cool air flow of 10cm     
     around  each air vent.  

DO NOT STAND OR USE RACKS NEAR HEATING DUCT  

     OUTLETS, APPLIANCES OR RADIATORS.   
     

If the rack is placed in an enclosed area (cupboard etc.) make sure that there    

     is plenty of  rear ventilation and the air is not recycling.  

 

 
b.  Rack mounting - Ears are provided for both front and rear support; a choice of   
     mounting position is given on the front brackets ( either proud  & level with the front 
     panel or sunk by 20mm and flush with the front escutcheon.) 
 
c.  Care is required when installing these units in a rack. It is advised to put the Rack   
     on its back, then place all the equipment being fitted into it before fitting retaining   
     bolts to avoid unnecessary handling damage. Rear support brackets are strongly   
     recommended to be used on each unit, to avoid transit damage. 
 

FITTING A POWER  LEAD & PLUG 

 
The wires in the IEC/CEE mains lead are coloured: 
Earth:  Green/Yellow  Neutral:  Blue  Live:  Brown 
 
As these colours may not correspond with the colour markings identifying the terminal in 
your plug proceed as follows: Green/Yellow wire must be connected to the terminal which 
is marked with the letter E or coloured Green. -  Brown wire must be connected to the 
terminal which is marked with the letter L or coloured red. - Blue wire must be connected 
to the terminal which is marked with the letter N or coloured black. 
 

2.

 

 

CONNECTIONS 

 
At the back of the amplifier you will find the following connection sockets:- 
 

Summary of Contents for QPX1200

Page 1: ...DUAL CHANNEL AUDIO POWER AMPLIFIER OWNERS MANUAL Hz INTERNATIONAL LTD COMBE HOUSE STOKE ST MICHAEL BATH SOMERSET ENGLAND QPX1200 CE 96 ...

Page 2: ...cking 2 Siting the power amplifier 3 Connections 4 Fitting a mains plug OPERATION 1 POWERING UP 2 SELECTING MODE 3 PEAK INDICATOR 5 TRIP INDICATOR AMPLIFIER MAINTENANCE TECHNICAL DATA FAULTS AND THEIR LIKELY CAUSES 1 INSTALLATION ...

Page 3: ...r ventilation and the air is not recycling b Rack mounting Ears are provided for both front and rear support a choice of mounting position is given on the front brackets either proud level with the front panel or sunk by 20mm and flush with the front escutcheon c Care is required when installing these units in a rack It is advised to put the Rack on its back then place all the equipment being fitt...

Page 4: ... CABLES The inputs are electronically balanced for those who require this facility with the tip of the jack being hot and the ring cold or balanced line and the sleeve ground However they can be used unbalanced with standard mono jack plug A link jack input is provided on each input channel so that any of the four channels can be joined together or linked down to another power amplifier in the rac...

Page 5: ... down the volume controls during switch on as precaution against speaker damage Which can be caused by instant high level feedback from an open channel mixer mic or system instability On initial switch on the trip indicator will light this should go out after a few seconds when the amplifier supplies have stabilised It is not recommended to switch the amplifier on and off rapidly several times ove...

Page 6: ...ier enclosed in a sealed rack with no air vents If the trip light fails to extinguish after 30 seconds from cold switch on then there is an internal fault in the amplifier and the relevent speaker s have been disconnected to protect them Advice should be sought from your dealer AMPLIFIER MAINTENANCE The amplifier contains no use serviceable parts inside Maintenance should be mainly preventative ta...

Page 7: ...o reset COOLING 2 fans speed change switched on at 50 deg C INPUTS 1 IEC Mains socket for A C input 8 stereo input link jacks balanced line 2 per ch OUTPUTS 4 XLR male sockets 1 per channel MAINS FUSE 12 5A HRC 20mm POWER FUSES 4 x 10A 20mm internal SIZE 483 X 90 X 290 19 x 3 5 x 11 WEIGHT 17Kg 38lbs MAINS SUPPLY 240 220v or 120 110v A C 50 60 Hz 1 4KVA full power 6 FAULTS AND THEIR LIKELY CAUSES ...

Page 8: ...nsure free air flow into and out of the unit The amplifier will reset itself when cool Or the amplifier has developed an internal fault please consult your dealer As a general rule jack plugs and sockets are very reliable especially if they are regularly connected and disconnected In situations where they are subject to prolonged static use it is good practice to clean the plugs and to clean the s...

Page 9: ...at has been replaced shall become the property of the company and the right is reserved by the company to replace the equipment or repair it at the option of the company 8 This guarantee applies to equipment purchased and used within the E E C The importers of equipment in non E E C countries are responsible for the guarantee of this equipment Parts required under guarantee are free Shipping charg...

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