NAD T 977 - Manual (Page 6)

1 input
· Each of the seven independent power amplifiers within the T 977
has its own signal input connector.
· Connect the output from a preamplifier or processor to this set of
inputs.
For optimum heat dissipation in an AV surround system, the following
audio channel allocations are recommended:
Channel 1 = Front Left speaker
Channel 2 = Surround Left speaker
Channel 3 = Surround Back Left speaker
Channel 4 = Center speaker
Channel 5 = Surround Back Right speaker
Channel 6 = Surround Right speaker
Channel 7 = Front Right speaker
NOTES
· Always turn OFF the T 977 and other components in the system before
connecting or disconnecting anything to the INPUT sockets.
· Before switching ON the T 977 from standby mode for the first time,
make sure all input level controls are set to minimum (MIN) level
position. This prevents inadvertently beginning a session at excessive
volume.
2 input level control
· The T 977 is equipped with separate input level controls for each
channel.
· Before switching ON the T 977 from standby mode for the first time,
make sure all input level controls are set to minimum (MIN) level
position.
level matching
In a surround sound or system with more than one set of speakers,
differences in levels can occur due to varying inefficiencies among the
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 T 977 have the correct 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).
IDENTIFICATION OF CONTROLS
rear panel
ATTENTION!
Ensure that the T 977 is 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.
© NAD T 977
FUSE
MAINS IN
SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER
INPUT
+12V TRIGGER IN
ON OFF
CH AN NE L 7 F RO NT R CH AN NE L 6 CH AN NE L 5 CH AN NE L 4 CH AN NE L 3 CH AN NE L 2 S UR R R S UR R-B R C EN TE R S UR R-B L S UR R L CH AN NE L 1 F RO NT L
FRONT R SURR R SURR-B R CENTER SURR-B L SURR L CHANNEL 1 FRONT L
LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL
MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN
CHANNEL 7 CHANNEL 6 CHANNEL 5 CHANNEL 4 CHANNEL 3 CHANNEL 2
INPUT INPUT INPUT INPUT INPUT INPUT
SOFT
CLIPPING
1 2
8 3 4 5 6 7
6
ENGLISH
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T977_eng_OM_v04.indd 6 17/04/2012 9:28am