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1  INPUT SELECT:

  Slide this switch to either “FIX” or “VAR”.  When it is 

set to FIX, the input signal is taken straight to the power amplifier’s 
circuitry.  This setting is normally used in a system with only one power 
amplifier or multiple but identical power amplifiers.

When the INPUT SELECT switch is set to “VAR” (Variable), it is possible 
to adjust the volume level for both channels simultaneously, using the 
INPUT LEVEL CONTROL. This can be useful for:

Level Matching

In a surround sound or system with more than one set of speakers, 
differences in levels can occur due to variance inefficiencies between 
these speakers. In case your preamplifier or processor also has 
individual trims for each channel, set these to neutral or mid position 
(usually marked as 0dB). Adjust the INPUT LEVEL CONTROL so that 
the speakers driven by the C 275BEE have the correct volume level 
compared to the other speakers, judging from your listening position.

Extended Volume Control Range

Many systems have so much voltage gain that the speakers (or your 
ears) are overdriven at any volume control setting higher than 11 or 12 
o’clock. As a result you are confined to using only the lower half of the 
volume control’s range, where adjustments are imprecise and where 
channel balance errors tend to be greater. 

If the input level is reduced, you can turn up the volume control of 
your processor or preamplifier, making more effective use of its range. 
(Suggestion: adjust the input level controls so that your preferred 
maximum sound levels usually occur at about 2 or 3 o’clock on the 
volume control.) As an added benefit, this procedure suppresses any noise 
produced by the preamplifier’s high level circuitry (e.g. any residual hum or 
hiss that does not go away when the Volume is turned down).

Bi-Amping

Some loudspeakers have separate connection terminals for their LF 
(Low Frequency) and HF (High Frequency) sections. Where a separate 
power amplifier is used for the LF and HF section, this facility allows to 
“Bi-Amp” such speakers which may improve overall sound quality. When 
Bi-Amping with different models of power amplifiers, it is likely to occur 
that one power amplifier has more “gain” than the other, resulting in a 
mismatch in level for the woofer and tweeter of the speaker. Adjust the 
level control so that woofer and tweeter are in perfect balance with 
each other (identical gain of power amplifiers).

NOTES

·  Always turn OFF the C 275BEE and other components in the system before 

connecting or disconnecting anything to the INPUT sockets. 

·  When the INPUT SELECT switch is set to “VAR” for the first time, it is 

advised that the “INPUT LEVEL CONTROL” level of the C 275BEE or the 
volume control level of your preamplifier/processor be set to their 
minimum settings. This prevents inadvertently beginning a session at 
excessive volume. You can then adjust both controls to your desired 
listening level.

2 INPUT:

  Connect the output from a pre-amplifier or processor, such as 

a surround-sound decoder, to this set of inputs. Use a twin RCA-to-RCA 
lead to connect the left and right “Audio Output” of the preamplifier or 
processor to these input sockets.

3  INPUT LEVEL CONTROL:

 The INPUT LEVEL CONTROL works in 

combination with the “VAR” (Variable) input setting. Turn clockwise to 
increase the “VAR” (Variable) volume level; counter clockwise to lower it. 

IDENTIFICATION OF CONTROLS

REAR PANEL

1

2

3

4

5

6

7

9

10

11

ATTENTION!

 

Please make sure that the C 275BEE is powered OFF or unplugged before making any connections. It is also advisable to power-down or unplug all 
associated components while making or breaking any signal or AC power connections.

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Содержание C 275BEE

Страница 1: ... Owner s Manual C275BEE Stereo Power Amplifier ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ ...

Страница 2: ...ly one way This is a safety feature If you are unable to insert the plug fully into the outlet try reversing the plug If the plug should still fail to fit contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the polarized plug 13 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed u...

Страница 3: ...ed by the manufacturer 23 Heat The product should be situated away from heat sources such as radiators heat registers stoves or other products including amplifiers that produce heat WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE CAUTION TO PREVENT ELECTRIC SHOCK MATCH WIDE BLADE OF PLUG TO WIDE SLOT FULLY INSERT THE LIGHTNING FLASH WITH ARROWHEA...

Страница 4: ...ries as unsorted municipal waste In order to achieve a high level of recycling waste batteries discard waste batteries separately and properly through an accessible collection point in your vicinity For more information about collection and recycling of waste batteries please contact your local municipality your waste disposal service or the point of sale where you purchased the items By ensuring ...

Страница 5: ...arpet Do not place it in an enclosed position such a bookcase or cabinet that may impede the air flow through the ventilation slots Make sure the unit is switched off before making any connections The RCA sockets on your NAD C 275BEE are colour coded for convenience Red and white are Right and Left audio respectively Use high quality leads and sockets for optimum performance and reliability Ensure...

Страница 6: ... such a case turn the C 275BEE OFF by the rear panel POWER switch wait for it to cool down and or check the speaker connections making sure the overall loudspeaker impedance doesn t go below 4 ohms or 8 ohms in Bridge mode Once the cause for the protection circuitry to engage has been removed switch ON the rear POWER button and the Standby Button to resume normal operation 3 BRIDGE MODE INDICATOR ...

Страница 7: ...way when theVolume is turned down Bi Amping Some loudspeakers have separate connection terminals for their LF Low Frequency and HF High Frequency sections Where a separate power amplifier is used for the LF and HF section this facility allows to Bi Amp such speakers which may improve overall sound quality When Bi Amping with different models of power amplifiers it is likely to occur that one power...

Страница 8: ...rought down to a level lower than 20mV 7 12V TRIGGER INPUT The 12V Trigger input allows the C 275BEE to be switched remotely from standby mode to ON and vice versa by ancillary equipments such as a preamplifier AV processor etc The controlling device must be equipped with a 12V trigger output to use this feature 8 FUSE HOLDER In the unlikely event a fuse may need to be replaced unplug the AC cord ...

Страница 9: ...Y BUTTON Power ON Power OFF 12V 0V Mini jack unplugged Input signal 20mV Input signal 20mV Press to enter Standby mode amber Press to turn ON blue POWER switch OFF 12VTRIGGER IN INPUT SENSE switch OFF POWER switch ON 12VTRIGGER IN INPUT SENSE switch OFF POWER switch ON 12VTRIGGER IN INPUT SENSE switch AUTO POWERDRIVE The C 275BEE uses NAD s proprietary PowerDrive amplifier technology for all chann...

Страница 10: ...ation No input signal applied through the INPUT sockets Check that there is active input signal applied through the INPUT sockets INPUT LEVEL CONTROL turned down Turn INPUT LEVEL CONTROL up to the correct level No sound one channel Speaker not properly connected or damaged Check connections and speakers Input lead disconnected or damaged Check leads and connections Weak bass diffused stereo image ...

Страница 11: ...z ref 3 dB Input impedance Fixed IN 10 kΩ 200 pF Input impedance Variable IN 100 kΩ 100 pF Input sensitivity 1 2 V ref rated power Voltage gain 29 dB Minimum input level for AUTO TRIGGER 10 mV at 1 kHz Time to power OFF at no signal in AUTO mode 10 minutes POWER CONSUMPTION Normal operation 312 W ref 230V AC 50 Hz 120V AC 60 Hz Standby power 1 W Idle power 100 W DIMENSION AND WEIGHT Dimensions W x...

Страница 12: ...nal a division of Lenbrook Industries Limited No part of this publication may be reproduced stored or transmitted in any form without the written permission of NAD Electronics International While every effort has been made to ensure the contents are accurate at the time of publication features and specifications may be subject to change without prior notice C275BEE_eng_OM_v08 Jul 2013 ...

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