NAD T955 Manuel D'installation page 8

2. INPUTS
Each of the five independent power amplifiers within the T955 has
its own signal input connector. Before making any connections to the
amplifier, make sure the POWER is switched OFF. [See figure 1]
Connect the signal cables from the preamplifier, surround sound
decoder, or other signal source to these inputs. For optimum heat
dissipation in an AV surround system, we recommend you allocate
the audio channels to the inputs as follows:
Channel 1 = Front Left speaker
Channel 2 = Surround Left speaker
Channel 3 = Center speaker
Channel 4 = Surround Right speaker
Channel 5 = Front Right speaker
3. SPEAKER CONNECTIONS
This amplifier is equipped with special high-current binding-post
speaker terminals. Connect the loudspeakers with heavy-duty
(16-gauge or thicker) braided wire. Connections may be made in any
of three ways. [See Figure 2.]
• Strip off a half-inch (1 cm) of insulation from each speaker wire. In
each conductor, twist the thin strands of wire together. Unscrew
the knob, insert the bare wire into the opening at the base of the
binding post, and tighten the knob until it grasps the wire securely.
Check to be sure that there are no loose strands of wire touching
the chassis or an adjacent terminal.
• Spade lugs. Unscrew the knob, insert the U-shaped spade lug
behind the bushing, and tighten the knob until the spade lug is
secured.
• Install banana plugs on your speaker wires, and plug them into the
end of each binding post.
NOTE: Speakers must operate in phase with each other in order
to produce a proper stereo image and to reinforce rather than
cancel each other's output at low frequencies. When connecting
speakers, take care that the red (positive) terminal on each
loudspeaker is connected to the corresponding terminal marked
red (positive) on the amplifier.
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T955 ML - e.indd 8
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4. SOFT CLIPPING
When an amplifier is driven beyond its specified power output it
normally produces "hard clipping" or distortion of the signal. Such
hard clipping, in addition to sounding unpleasant, can damage the
speakers in the system. The NAD Soft Clipping circuit gently limits
the output waveform, minimizing audible distortion and reducing
the change of speaker damage when the amplifier is overdriven. We
recommend that the Soft Clipping switch on the back panel of the
T955 be left in the ON position when system is being operated at
levels that might exceed the amplifier's power capacity. The LED on
the front panel indicates if Soft Clipping has been engaged.
5. AUTO TRIGGER ON/OFF
Set the Auto Trigger switch to the ON position to activate the 12V-
trigger. By connecting the 12V-trigger, the T955 can be remotely
switched to On and Standby and vice-versa. When set to the Off
position, the 12V-trigger input is not active.
NOTE: With the Auto Trigger switch set to the ON position and the
12V-trigger input connected, the T955 will switch from Off to
Stand-by when the Power Switch on the front panel is pressed. For
normal operation, ensure the switch is in the OFF position or that
the 12V-trigger input socket is not connected.
6. 12V-TRIGGER INPUT
For external Power on/Stand-by switching, connect the 12V-trigger
output of a source component to this DC input jack. The center pin
is the live or + connection, the outer sleeve of the input jack is the
12V-trigger - or ground connection.
NOTES: The T955's 12V-trigger will work within a range of 6 to
15 V DC level and typically draws less than 10mA of current.
Check the specifications of the 12V-trigger source to ensure it is
compatible with the T955's 12V-trigger input. Do not exceed the
recommended voltage as this may cause damage to the T955.
7. FUSE HOLDER
There is a fuse holder nearby or next to the AC-line cord. In the
unlikely event a fuse may need to be replaced, unplug the line cord
from the wall. Then remove all connections from the amplifier. Only
replace the fuse with the same type, size, and specification.
5/16/06 4:50:23 PM