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Page 3 

Operating instructions 

Connections

- Source inputs

So, now you can connect the different elements of 
your system (CD, tuner etc.) to the appropriate 
cinch (RCA) inputs at the rear of the amplifier. 
These are the 

source inputs

 – they are identical. 

 
Use high quality shielded cable in order to avoid 
‘parasite noise’ and a weakening of the treble 
frequencies. The listening of the sound source is 
obtained by selecting the appropriate 

source

 

POWER IN

 allows you to attack the power section 

directly. Use the 

Direct

 button on front plate and/or

the remote control handset. 
It is not affected by the volume control. 
You can connect, for example, an A/V processor 
(the volume control of the processor will then be 
active); a mixing desk or any other source that 
delivers 2V RMS and has a volume control. 
The 

PRE OUT

 output allows you to use the output 

of the preamplifier.  
The volume of the signal depends on the position of 
the potentiometer on the front plate. 
The gain of the preamp is graduated in decibels -  

0dB 

corresponds to a unitary gain. This output is 

permanently available and does not depend on the 
remote control handset.  
 
This is a output/input loop for all types of recording 
systems. The signal on the monitor output is that of 
the input selected and does not pass by the 
preamp. The output of the recorder is connected to 
the input 

MONITOR IN. 

This input is independent of the other inputs and is 
validated by the MONITOR on the front plate or by 
the remote handset. 
   
Turning on : The main on/off switch is situated on 
the rear plate. Turn on the amplifier with this 
switch : the numbers indicating the gain will light up
in blue on the front plate (8) ; the amplifier is in 
stand-by mode. With normal use, you don’t need to 
turn off with the rear plate switch; use the POWER 
button situated on the front plate. 

Never turn off the amplifier with the rear switch, nor 
disconnect the mains cable without having first turned off the 

unit with the POWER button as this can damage the power 
section.  
 

-  

Direct

-  

Monitor

Turning on

Summary of Contents for Explorer 150SB

Page 1: ...KORA Electronic Concept Explorer 150SB Hybrid integrated amplifier User s manual Kora E C 8 bis rue Claude Perrault 31000 Toulouse France Web www kora net Email kora wanadoo fr...

Page 2: ...tronic Concept the Kora team Read before use voltage installation speakers Operating instructions connections inputs direct monitor turning on Starting up start procedure turning off Audio Video phase...

Page 3: ...the time for the Aero Spatial complex in Toulouse south west France The transition from designing power supplies to producing Kora s first hi end tube amplifier the Design 30 took four years of resea...

Page 4: ...tion for your 150SB make sure it is well ventilated Connect your speakers to the speaker terminals on the rear plate of your amplifier Red is positive and black negative That s red to red and black to...

Page 5: ...ion of the potentiometer on the front plate The gain of the preamp is graduated in decibels 0dB corresponds to a unitary gain This output is permanently available and does not depend on the remote con...

Page 6: ...fortable One indication as to whether you have inverse phasing when you shouldn t is when you find you need a great amount of volume in order to hear properly You re probably out of phase if this happ...

Page 7: ...onto the protection mode in less than a millisecond At this moment all the lights will shut down including the gain numbers on the volume window This signifies a fault in the unit please contact your...

Page 8: ...anty does not apply to any defect that Kora E C in its sole discretion determines is due to 1 Improper maintenance or repair including installation of parts and accessories that do not conform to the...

Page 9: ...nputs selector 5 Increase output volume selector 6 Decrease output volume selector 7 Headphone socket 8 Volume dial in dB Blue LED indicates selected source Rear plate 1 Direct input to the power sect...

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