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5

CONNECTIONS 

 
INPUTS 
 
The inputs are made via 2 separate 3 pin XLR connectors wired in parallel. Either socket can be used as 
the  input,  the  other  one  can  be  used  to  link  to  other  amplifiers  (‘daisy  chain’)  or  to  the  other  input  for 
mono signals. 
 
They are electronically balanced and should be connected via a high grade twin core screened cable, as 
follows :- 
 

 

 

 

 

 

 

 

 

 

PIN1  -   Screen (see note) 

 

 

 

 

 

 

 

 

 

 

PIN2  -   Hot  () 

 

 

 

 

 

 

 

 

 

 

PIN3  -   Cold (signal -) 

 

The  amplifier  is  designed  to  operate  with  fully  balanced  equipment  and  ground  loops  or  loss  of 
performance  may  be  experienced  if  connected  to  unbalanced  sources.  If  it  is  unavoidable  however,  the 
following wiring should be used. The cable should still be twin core plus screen.  
 
PIN1  -  Screen - connected to the chassis of the unbalanced equipment - or left disconnected at the  
 

 

 

unbalanced end. 

PIN2  -   Signal Hot 
PIN3  -   Signal Cold 
 
The input requires a peak level of +6dBm for full output. 
 

NOTE

:  This amplifier is wired to the latest industry recommendations. PIN1 is connected directly to  

 

 

 

the chassis/mains earth. If ground loops (mains hum) are encountered remove the screen  

 

 

 

connection from the other end of the cable and leave it open circuit. If problems persist,   

 

consult  your  dealer/supplier,  DO  NOT  TAMPER  WITH  OR  ALTER  ANY  GROUND 
(EARTH) CONNECTIONS INSIDE THE AMPLIFIER. 

 
BRIDGED OPERATION 

 

 
In Bridged mode input A is fed to both channels. Channel B will be out of phase with channel A. 
 
OUTPUTS 
 
The speaker outputs are via 4  mm shrouded binding  posts. They can be used with 4 mm plugs or plain 
wires, which can be inserted in the sides of the terminals. 
  
Terminations are as follows :-  Hot   

 Red 

 

 

 

 

 

 

 

 

 

Cold   

 Black 

 

NOTE

:  1.  Although the "cold" output terminals are nominally at 0V., they should not be joined  

 

 

 

together, otherwise cross-talk may be introduced. 

 

 

 

 

2.  The currents involved are very high, especially when using 2 ohm. loads. The speaker  

 

 

 

cables should be capable of carrying the currents, otherwise the losses will cause the  

 

 

 

 

cables to get hot and audio power will be reduced. The minimum rating for an MC750 or  

 

 

 

MC650 should be 15 amps for 4 ohm and 20 amps for 2 ohm loads. For the MC450 it is  

 

 

 

12 amps for 4 ohms and 15 amps for 2 ohms. 

Содержание MC450

Страница 1: ...MC450 MC650 MC750 OPERATING INSTRUCTIONS MC 2 AUDIO Ltd Units 6 7 Kingsgate Heathpark Industrial Estate HONITON Devon EX14 1YG England Tel 0 1404 44633 Fax 0 1404 44660 www mc2 audio co uk ...

Страница 2: ...Inputs 5 Outputs 5 Rear panel switches 6 OPERATION Switching on 6 Level controls 6 Mute switches 6 Link switch 6 Level indicator 7 Limiters 7 Temperature control 7 Fault indicators 8 2 ohm LED 8 INTERNAL CONFIGURATION SWITCHES 8 FAULTS FUSES 8 REMOTE CONTROL OPTION 9 REMOTE CONTROL SET UP INSTRUCTIONS 10 ...

Страница 3: ... ohms Dimensions mm all 2U 88x482x381 88x480x410 88x480x410 Weight 20 4 kgs 22 kgs 22 kgs Power requirement 230 VAC 230 VAC 230 VAC 7 0 amps max 9 0 amps max 10 0 amps max or 120 VAC 120 VAC 120 VAC 14 0 amps max 18 0 amps max 20 0 amps max Product compliance to EC Directives This product conforms to the relevant Directives Regulations and Standards for electronic and associated apparatus The equi...

Страница 4: ...or safety reasons THE EARTH LEAD SHOULD NOT BE DISCONNECTED IN ANY CIRCUMSTANCE If ground loops are encountered consult the section on input connections later in this manual TO PREVENT THE LIKELIHOOD OF SHOCK OR FIRE HAZARD DO NOT EXPOSE THE UNIT TO RAIN OR MOISTURE TO AVOID ELECTRICAL SHOCK DO NOT REMOVE COVERS REFER ALL SERVICING TO QUALIFIED PERSONNEL INSTALLATION MECHANICAL To ensure that this...

Страница 5: ...N1 is connected directly to the chassis mains earth If ground loops mains hum are encountered remove the screen connection from the other end of the cable and leave it open circuit If problems persist consult your dealer supplier DO NOT TAMPER WITH OR ALTER ANY GROUND EARTH CONNECTIONS INSIDE THE AMPLIFIER BRIDGED OPERATION In Bridged mode input A is fed to both channels Channel B will be out of p...

Страница 6: ...et PANEL CONTROLS AND INDICATORS Level controls These are continuous rotary encoders which provide fine adjustment 3 turns from min to max When adjusted the level indicators change to level control position indicators and thus the height of the LED column shows the level position After a second or so the LED column changes back to monitor the signal level This function can be changed internally vi...

Страница 7: ...evel controls are manually turned back up or until the amplifier is switched off NOTE All levels are referenced to the clipping point of the amplifier and not an actual output voltage or power level If the mains power drops or increases then the limit threshold will also change thus maintaining maximum output level Temperature Control If the heat sinks get excessively hot the controller will autom...

Страница 8: ...columns will always show the signal level and will not change to show the level control position when the level controls are adjusted Sw 4 5 These select the threshold level as follows Sw4 Sw5 ON ON Just below clipping point ON OFF 1dB below clipping point OFF ON 2dB below clipping point OFF OFF 3dB below clipping point Sw 6 Sw 7 operate together they determine the operating mode and release time ...

Страница 9: ...gether and controlled all at the same time within that group The front panel controls on the amplifiers can be locked out so that they can only be controlled from the computer This allows the system to be set up to the client s requirements and then made secure against manual interference Two levels of security are available on the management control system through the use of passwords which permi...

Страница 10: ...either end of the cable and connected as follows PIN 2 hot positive PIN 3 cold PIN 5 screen Configuring the PC 1 Launch Amplifier Explorer program can be downloaded from www mc2 mc2 audio co uk 2 Click on the Tools menu and select Serial link setup Then SET OPERATING SYSTEM e g WIN98 SET COM PORT NUMBER SET PORT ADDRESS This happens automatically Set up is now complete Each amplifier has its own i...

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