INSTRUCTIONS FOR INSTALLATION
A NOTE ON INSTALLATION
This unit may be installed on any stable surface.
Since its power transformer (near the left-rear corner)
generates a magnetic hum field of moderate strength,
an LP turntable should not be located directly to its
The amplifier also generates a modest amount of
heat and thus requires some ventilation. Do not
place it on a rug or other soft surface that it could sink
into, obstructing the air inlets on its bottom. And do
not allow papers or cloth to obstruct the ventilation
grille in the top cover.
CAUTION: To prevent a fire or shock hazard, do
not permit this product to become wet. If liquid is
accidentally spilled on it, immediately shut off its
power and unplug the AC power cord. Allow suffi-
cient time for complete evaporation to occur before
operating the amplifier again. If the liquid is anything
but water and/or alcohol, the amplifier should be
examined by a service technician before power is
applied to it.
Do not remove the cover, or attempt to modify or
repair the amplifier yourself. Refer all servicing to a
REAR PANEL CONNECTIONS
1. AC LINE CORD
After you have completed all connections to the
amplifier, plug the AC line cord into a "live" wall sock-
et or into a heavy-duty extension cord.
WARNING TO UK USERS. If this appartus is not
fitted with a UK three-pin plug, do not attempt to
insert the attached plug into a UK mains socket.
Instead, cut the plug from the mains lead and attach
a fused UK three-pin plug using the following safety
advice on wiring.
IMPORTANT. The wires in this mains lead are
coloured BLUE and BROWN;
The colours of these mains lead wires may not corre-
spond with the coloured markings identifying the ter-
minals in your plug. In this case the BROWN wire
must be connected to the terminal which is marked
L(ive) or coloured RED. The BLUE wire must be con-
nected to the terminal marked N(eutral) or coloured
BLACK. No connection should be made to the termi-
nal marked E or coloured green or green and yellow
2. SPEAKER TERMINALS.
Use these high-current binding-post terminals to
connect your main stereo speakers.
post consists of a threaded metal shaft and a red or
black plastic screw-on bushing.
Connect the wires from your left-channel speaker
to the (L+) and (L-) terminals, and connect the wires
from the right-channel speaker to the (R+) and (R-)
terminals. In each channel the red terminal is the
positive (+) output, and the black terminal is the nega-
tive (-) or "ground" terminal. For best stereo imaging,
the left and right speakers should be located at equal
distances from your chair.
Use heavy-duty (1.5mm2, 16-gauge, or thicker)
stranded wire, especially with 4-ohm loudspeakers.
Bare wires can be connected directly to the binding-
post terminals. For a longer-lasting and more corro-
sion-resistant connection you may purchase speaker
cables with nickel or gold-plated connectors (spade
lugs, banana plugs, or pin connectors), or install such
connectors on the wires yourself. Connections to
each binding post may be made in several ways, as
follows. [Figure 1.]
(1) Pin connectors. A pin connector is a slim metal
shaft that is crimped or soldered onto the end of a
wire. The binding posts accept pin connectors up to
3mm in diameter. Unscrew the plastic bushing on
each terminal to expose the hole in the metal shaft.
Insert the pin connector through the hole, and turn
the bushing clockwise until it is tight.
(2) Spade lugs. Unscrew the colored bushing,
insert the U-shaped spade lug behind the bushing,
and tighten the bushing down on it.
(3) Banana plugs. Insert a banana plug directly
into the hollow end of each binding post. The termi-
nals are separated by 3/4 inch (19mm), so they will
accept dual-banana plugs. Before using banana
plugs, the red and black inserts have to be removed
with the aid of a small screwdriver.
(4) Bare wires. Separate the two conductors of the
cord, and strip off a half-inch (1 cm) of insulation from
each. In each conductor, twist together the exposed
wire strands. Unscrew the red or black bushing,
insert the bare wire through the hole in the metal
shaft, and tighten the plastic bushing until it grasps
the wire securely. Check to be sure that no loose
strand of wire is touching the chassis or an adjacent
Phasing. Stereo speakers must operate "in phase"
with each other in order to produce a focused stereo
image and to reinforce rather than cancel each
other's output at low frequencies. An in-phase con-
nection is assured if the red (positive) terminal on the
amplifier is connected to the red (positive) terminal on
the loudspeaker, in each channel. Methods of check-
ing for correct phasing are described in the Appendix.
3. CD INPUT.
Connect the audio signal cables from a Compact
Disc player to these jacks. (NOTE: this input is for an
audio signal, not for the digital-code output of a CD
player.) If you don't have a CD player, any other line-
level signal source (such as a MiniDisc player or a
spare tape deck) may be connected to the CD input.
4. TUNER INPUT.
Connect the audio signal cable from a radio tuner
(AM, FM, or digital radio) to this pair of jacks.
NAD 310 STEREO INTEGRATED AMPLIFIER