NAD C275BEE - Power Drive

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 STANDBY BUTTON
+12V TRIGGER IN
(using 3.5mm mini-jack plug)
INPUT SENSE
Power
ON
Power
OFF
Standby Mode
(amber)
Switch ON
(blue)
+12V 0V
Mini-jack
unplugged
Input signal
>20mV
Input signal
<20mV
POWER switch : OFF
+12V TRIGGER IN/INPUT SENSE Sense: OFF
-

----- - -
POWER switch : OFF
+12V TRIGGER IN/INPUT SENSE Sense: OFF
-

--

-- - -
POWER switch : OFF
+12V TRIGGER IN/INPUT SENSE Sense: OFF
-

---

---
POWER switch : OFF
+12V TRIGGER IN/INPUT SENSE Sense: OFF
-

----

--
POWER switch : OFF
+12V TRIGGER IN/INPUT SENSE Sense: OFF
-

-----

-
POWER switch : OFF
+12V TRIGGER IN/INPUT SENSE Sense: OFF
-

----- -

POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: OFF

-

-- - - -
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: OFF

--

-- - -
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: OFF

-

--

---
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: OFF

-

--

--
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: OFF

-

-- -

-
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: OFF

-

-- - -

POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: AUTO

--

-- - -
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: AUTO

-

--

---
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: AUTO

-

--

--
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: AUTO

--

-- -

-
POWER switch : ON
+12V TRIGGER IN/INPUT SENSE Sense: AUTO

-

--- - -

NOTE
If the +12V TRIGGER IN/INPUT SENSE switch is set to OFF, the presence or absence of +12V trigger input or any input signal at the INPUT sockets will not
have any eect on the C 275BEE, eectively defeating both features.
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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