MENU DESCRIPTION
In the same time, the output (analog or digital) gains of all the channels are automatically
adjusted to keep the same overall gain from inputs to outputs of the NXAMP.
Advantage of reducing the headroom is that it adapts the resolution of the converters to
the scale of the analog input signal, thus improving background noise and reducing
distortion.
Drawback of reducing the headroom is that you may clip the converters before clipping the
amplifier, thus virtually reducing the output power of the amplifier. Thus when adjusting
the headroom, be sure to always use program material that matches the actual program
that will be played, and check that the Peak LED for this channel is not starting to blink at a
lower level than before; it yes, it means that you are lowering the maximum output of the
amplifier because of a too low headroom, then increase the headroom.
Default headroom position (0 B) should be considered for most application. If
you are not sure of how to adjust headroom, leave if to the default position (0
dB) which is the safest position.
Note: Because same analog input signal can be routed to several outputs, it is always best
to use same value of headroom on all channels, or to use separate analog input to various
outputs (using link at the back of the amplifier if needed). Using different values of
headroom on channels using same input can reduce or cancel the effect of the headroom.
Note: Headroom effect is compensated on the digital inputs using digital gain.
Note: Software peak limiter prevents hard clipping of the converters if needed in case of
reduced headroom value; thus gentle lighting of the Peak LED can be authorized without
sound quality issue.
Options Menu
With this menu you can enter some sub-menu to adjust parameters of the NXAMP does do
not need to be changed during the normal use of the amplifier (mainly during setup of the
unit only). Bellow is a picture of this menu.
The sub-menu located on the top of the screen will blink (here it is 1.Systm Config).
Depressing “select” of channel 4 will enter this sub-menu (“OK” is displayed on the screen
align with “select” 4 button). Turn the wheel to select another sub-menu. When coming
back to the Options menu later, the last selected sub-menu will be displayed first.
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