GBNAD 916 MULTI CHANNEL
POWER AMPLIFIER
A NOTE ON INSTALLATION 3. LINE OUTPUTS
Each input has an accompanying line output which
This unit may be installed on any sturdy, level sur-will pass the signal on to another amplifier input or
face. Since its power transformers generate a mag-other line-level device. The line outputs are buffered,
netic hum field of moderate strength, a turntableso that a low impedance or short circuit placed across
(especially one with a moving-coil pickup cartridge)it will not affect the signal at the input. For multi-room
should not be located near the amplifier.
The amplifier requires ventilation. Do not obstructinstallations the line outputs may be connected to the
the air outlet grilles on the top or bottom covers, andinputs of another pair of amplifiers within the 916 to
do not place the amplifier on a rug or other soft sur-provide separate stereo amplification for one or two
face. Do not place the amplifier in an enclosed situa-other zones, each with its own level control (see # 4).
tion such as in a bookcase or in a cabinet.
SAFETY WARNING: Please ensure that the4. INPUT LEVEL
Volume controls at the rear of this amplifier are set toThe amplifier is equipped with separate input level
minimum level (i.e. COUNTER CLOCKWISE, viewedcontrols for each channel. Before turning on the 916
from the back panel).for the first time, make sure all level controls are in
If this piece of equipment is to be used in a multi-their normal full-clockwise position. Under some cir-
cumstances, other settings may be useful for:
room ouput of a NAD product, please ensure that(1). Level-matching. In a surround-sound or other
before turning on the system for the first time, themulti-amplifier system, reduce some of the controls
Volume controls on any auxiliary amplifier ARE SETas necessary to balance the system with speakers of
TO THE MINIMUM LEVEL.
The multi-room output is not affected by thevarying sensitivities.
Volume or Tone controls (Treble, Bass) of the main(2). Extended volume-control range. Many stereo
system controls, so care must be taken to preventsystems have so much voltage gain that the speakers
auxiliary amplifiers being driven at full output level.(or your ears) are over-driven at any volume-control
setting higher than 11 or 12 oOclock. As a result you
are confined to using only the lower half of the vol-
WARNING TO UK USERS. If this appartus is notume controlOs range, where adjustments are impre-
fitted with a UK three-pin plug, do not attempt tocise and where channel-balance errors tend to be
insert the attached plug into a UK mains socket.greater. If all input-level controls are reduced, you
Instead, cut the plug from the mains lead and attachcan turn up your preamplifierOs volume control, mak-
a fused UK three-pin plug using the following safety
advice on wiring.ing effective use of most of its range. (Suggestion:
adjust the input level controls so that your preferred
IMPORTANT. The wires in this mains lead aremaximum sound levels usually occur at about 2 or 3
coloured BLUE and BROWN;oOclock on the volume control.)
BLUE: NEUTRALBROWN: LIVEAs an added benefit, this procedure suppresses
The colours of these mains lead wires may not cor-any noise produced by the preampOs high-level cir-
cuitry (e.g. any residual hum or hiss that does not go
respond with the coloured markings identifying theaway when the Volume is turned down).
terminals in your plug. In this case the BROWN wire
must be connected to the terminal which is marked(3) Balance correction. Small errors in channel
L(ive) or coloured RED. The BLUE wire must be con-balance can dramatically degrade the apparent
nected to the terminal marked N(eutral) or colouredOdepth� and Oair� of the stereo image. Such balance
BLACK. No connection should be made to the termi-errors may be due to normal production-line differ-
nal marked E or coloured green or green and yellow ences in speaker sensitivity, differences in the
acoustic environment around the two speakers, and
slightly different distances from your chair to each
speaker. You can use the input-level controls to cor-
rect these fixed balance errors, freeing your preampli-
fierOs balance control to correct balance errors in
REAR PANEL CONNECTIONS recordings.
1. AC LINE CORD
Plug the AC line cord into a nearby wall outlet thatSwitch the preamp to mono and sit in your normal
provides the correct AC power line voltage, or into alistening location. Ideally the Ophantom� central
switched convenience outlet on your preamp.image should seem to be floating in mid-air midway
between the left and right speakers. If it is located
off-center, closer to one speaker, turn down the input-
2. INPUTSlevel control for that channel slightly in order to re-
Each of the three independent stereo power ampli-center the phantom mono image. Then restore the
fiers within the 916 has its own pair of inputs and out-preamp to normal stereo operation.
puts. Before making connections to the amplifier,
make sure the POWER is switched OFF.
5. SPEAKER CONNECTIONS
Connect the signal cable from the preamplifier, sur-This amplifier is equipped with special high-current
round decoder or other signal source to these inputs.binding-post speaker terminals to handle the highest
If you need fewer than six channels of amplification,peak power levels that may occur in the Obridged�
see BRIDGING (# 6). mode or with low-impedance loudspeakers. Connect
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ACEC
