Digital Soft Clipping - NAD C 390DD Owner's Manual

There are two options when Subwoofer is enabled - Mode and Crossover.
Subwoofer
}Mode
Crossover
MODE
Set the subwoofer mode to either mono or stereo setting.
Mode
}~Mono
`Stereo
MONO
Select this setting when using one subwoofer. At mono mode, the left and
right channels are summed in the low pass subwoofer output to drive a
single subwoofer.
STEREO
Select this setting when using two subwoofers, one for the left channel and
one for the right channel.
CROSSOVER
Crossover allows easy bi-amplification or subwoofer integration by adding
the required filters to redirect bass frequencies to the subwoofer.
Crossover
}Frequency
High Pass Trim
Low Pass Trim
Crossover Frequency
}~40Hz
`50Hz
`60Hz
Frequencies from 40Hz to 200Hz can be selected, with the high pass signal
sent to the C 390DD amplifier section and the low pass signal sent to the
Subwoofer Out.
CROSSOVER FREQUENCY (40Hz, 50Hz, 60Hz ...180Hz, 190Hz, 200Hz, Full)
Frequencies from the selected frequency and below will be directed to
subwoofer output.
NOTE
Since the low pass filter is already implemented in the C 390DD, the
subwoofer should be set to the highest frequency crossover setting
available or bypassed if it also includes a crossover function.
LEVEL TRIM
Level trim allows exact volume matching of the subwoofer level to the
main speaker level.
Crossover
Frequency
}High Pass Trim
Low Pass Trim
High Pass/Level Trim
Attenuate amplitude level of high pass filter up to -12dB (range: 0dB to
-12dB).
High Pass
Level Trim
Low Pass/Level Trim
Attenuate amplitude level of low pass filter up to -12dB (range: 0dB to
-12dB).
Low Pass
Level Trim

DIGITAL SOFT CLIPPING

Soft Clipping
`On
}~Off
Enables NAD's proprietary Soft Clipping circuitry on all channels. Soft
Clipping allows a graceful overload without the usual generation of high
order harmonic distortion that normally occurs as the sine wave gets
squared off. Now digitally controlled, it can be carefully modeled for ideal
results.
At "On" setting, Digital Soft Clipping gently limits the output of the C 390DD
to minimize audible distortion should the amplifier be overdriven. Soft
Clipping may simply be left "On" at all times to reduce the likelihood of
audible distortion from excessive volume settings. Set to "Off" for critical
listening and to preserve optimum dynamics.
OPERATION
USING THE C 390DD
0dB
0dB
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