Owner's Manual

AUTOMATED TURN-ON LOGIC (ATO LOGIC)
The C 275BEE may be turned ON in any one of three discrete ways for
complete system exibility - from the front panel standby button, the
12V-TRIGGER circuit or by the input signal-sensing circuit. The ON/OFF
power control is managed by the Automated Turn-On logic or ATO Logic
circuit that requires the C 275BEE to be switched back to standby mode in
the same manner by which it was activated. In other words, if the C 275BEE
is switched ON via a +12V-control signal, it cannot be switched to standby
mode via the front panel STANDBY button, it must wait for removal of the
+12V-control signal. In practice, you probably would use only one of the
methods once your C 275BEE is installed.
IDENTIFICATION OF CONTROLS
REAR PANEL
ATO LOGIC CHART
CONDITION
POWER SWITCH
+12V TRIGGER IN
(using 3.mm mini-jack plug)
INPUT SENSE STANDBY 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
+12V TRIGGER IN/
INPUT SENSE switch: OFF
-
✓
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✓ ✓
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-
✓
-
✓
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-
✓
- -
✓
- - - -
-
✓
- - -
✓
- - -
-
✓
- - - -
✓
- -
POWER switch : ON
+12V TRIGGER IN/
INPUT SENSE switch: OFF
✓
- - - - - -
✓ ✓
✓
-
✓
- - - - - -
✓
- -
✓
- - -
✓ ✓
✓
- - -
✓
- -
✓ ✓
✓
- - - -
✓
-
✓ ✓
✓
- - - - -
✓ ✓ ✓
POWER switch : ON
+12V TRIGGER IN/
INPUT SENSE switch: AUTO
✓
- - - - - -
✓ ✓
✓
-
✓
- - - - - -
✓
- -
✓
- - -
✓ ✓
✓
- - -
✓
- -
✓ ✓
✓
- - - -
✓
- - -
✓
- - - - -
✓ ✓ ✓
POWERDRIVE
The C 275BEE uses NAD’s proprietary PowerDrive™ amplier technology
for all channels to preserve accurate, linear reproduction regardless of the
loudspeaker. This uniquely ecient power-supply topology provides the
real-world benets of high dynamic power that remains uncompromised
by low-impedance speakers.
By adding a second high-voltage rail to our well regulated high-current
power supply, we get an “overdrive” that can nearly double the continuous
power on a short term dynamic power basis. PowerDrive oers greater
amplier stability and low impedance drive capability, resulting in less
distortion when driving real speakers with real program material.
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