Bridge Mode; Soft Clipping - NAD C370 Owner's Manual

If you are using a pair of power amplifiers specifically for Bi-
Amping, use the PRE OUT 2 sockets to connect the power amplifier
with the highest gain of the pair. By adjusting the VOLUME PRE OUT
2 control (No. 11) the volume level can be matched exactly to that
of the power amplifier connected to the PRE OUT 1 sockets. Refer
also to chapter "Bi-Amping" for more information. Use a twin RCA-
to-RCA lead to connect to the left and right 'Audio Input' of the
Power amp to the PRE OUT 1 & 2 sockets.
NOTES: Always turn the C370 and associated external power
amplifiers off before connecting or disconnecting anything to the
PRE-OUT 1, 2 and MAIN-IN sockets.
The PRE-OUT 1&2 output signals will be affected by the NAD
C370's volume and tone control settings.
11. VOLUME PRE OUT 2
The VOLUME Pre-Out 2 control allows for adjustment of the
output level of the PRE OUT 2 sockets. The output level can be
reduced from 0dB to -12dB; when set to the maximum position
(at the 0dB position), the output level will be identical to that of
the PRE OUT 1 sockets. Refer also to chapter "Bi-Amping" for
more information.
NOTES: Always turn the C370 and associated external power
amplifiers off before connecting or disconnecting anything to the
PRE-OUT 1, 2 and MAIN-IN sockets.
The PRE-OUT 1&2 output signals will be affected by the NAD
C370's volume and tone control settings.

12. BRIDGE MODE

The NAD C370 can be used as part of a higher power stereo or
home-theatre system, by connecting adding additional power
amplifiers. If the power amp section in the NAD C370 is to be used
to drive a single speaker, then use the Bridge switch to run the
built-in Left and Right power amplifiers as a single channel, high
power unit. Set the BRIDGE MODE switch to the 'Bridge' position
and connect the speaker to the terminals marked 'L +' and 'R+'
ensuring that the 'L+' is connected to the '+' terminal on your
loudspeaker and the 'R+' is connected to the loudspeaker's '-'
terminal. Connect the source to the Left MAIN-IN input.
In Bridged Mode the NAD C370 will produce approximately 300W
into an 8 ohm loudspeaker. In this mode, the amplifier sections
will react as though the speaker impedance has been halved. Low
impedance speakers (under 8 ohms) are not recommended when
using Bridge Mode, as these may cause the amplifier's thermal
cut-out to operate if played at high levels.
The Bridge LED on the front panel (Fig. 2; No. 2) will illuminate
when the amplifier is in Bridge mode.
NOTES: Do not connect anything to the Right MAIN-IN input
(No. 9) when Bridge Mode is selected. Always turn the C370 and
associated external power amplifiers off before connecting or
disconnecting anything to the PRE-OUT 1, 2 and MAIN-IN sockets.

13. SOFT CLIPPING™

When an amplifier is driven beyond its specified power output, a
hard, distorted sound can be heard on very loud sounds. This is
caused by the amplifier cutting off or 'hard clipping' the peaks of
sound that it was not designed to reproduce. The NAD Soft
Clipping™ circuit gently limits the output of the system to
minimise audible distortion if the amplifier is overdriven.
If your listening involves moderate power levels you may leave the
Soft Clipping™ switch to Off. If you are likely to play at high levels,
that could stretch the amplifier's power capability, then switch Soft
Clipping On. The Soft Clipping™ indicator on the front panel will
illuminate when the amplifier is in Soft Clipping mode.
14. NAD-LINK IN, OUT
The NAD-Link connector is used to pass commands from other
units fitted with NAD-Link connectors. This allows centralised
control of a complete system, and also allows some of the basic
functions of other NAD components (such as a tuner, CD player or
cassette-deck) also equipped with NAD-Link to be controlled with
the amplifier's remote control. To function with such other units,
connect the C370's NAD-Link Out to the NAD-Link In on the other
unit. NAD-Link connectors can be daisy-chained, IN to OUT, so
that a whole system can be controlled from the remote control
facilities of one unit.
NOTES: It is advisable not to connect NAD-Link if these units that
have their own built-in remote control command receiver and are
positioned together, in direct view from the remote control
handset. If you are unsure, try operating the products without
NAD-Link first; If the unit responds to the remote control
command, it will not be necessary to connect NAD-Link.
Never loop the last unit back to the first NAD unit in the NAD-Link
chain. Unplug all units from the mains before connecting or
disconnecting NAD-Link.
15. 12V TRIGGER OUT
This output allows to remotely switch on or off ancillary
equipment such as a tuner, power amplifier, etc. which are also
equipped with a 12V trigger input. This can also be an AC outlet
power strip equipped with a 12V trigger input. The 12V trigger
output is activated whenever the unit is switched to normal
operational mode from Stand-by or Off.
For switching Stand-by/Power On of an external component
through the C370, connect the12V-trigger output of the C370 to
the remote component's DC input jack. The plug required is a
standard 3.5mm Mini-Jack plug ("mono"): The tip is the live or +
connection, the shaft of the input jack is the 12V-trigger - or
ground connection.
NOTES: Check the specifications of the Trigger input terminal on
the other components to ensure these are compatible with the
C370's 12V-trigger output. NAD components equipped with 12V
input triggers are fully compatible with the C370's 12V output
trigger. The C370's 12V-trigger output voltage is 12V DC. The total
maximum current must not exceed 200mA. Typically, NAD 12V
input triggers draw less than 10mA of current.
Before making any connections to any 12V trigger input or output,
make sure all components are disconnected from the AC mains.
Failure to observe the above may result in damage to the C370 or
any ancillary components attached to it. If in doubt over the
connections, installation and operation of the 12V trigger output
consult your NAD dealer.
16. SPEAKERS A + SPEAKERS B
The NAD C370 is equipped with two sets of speaker connectors.
Use the Speakers A connectors for the 'main' speakers and use the
Speakers B connectors for a second pair, for example, extension
speakers located in another room.
GB
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