will be displayed throughout the
BeoLab 90 interface.
Inputs
Power Link
XLR
S/P-DIF
RCA
Optical
USB-Audio
WPL / WiSA
Automatic
AUTOMATIC SENSE
MANUAL SENSE
...
Inputs
Power Link
XLR
S/P-DIF
RCA
Optical
USB-Audio
WPL / WiSA
Automatic
AUTOMATIC SENSE
MANUAL SENSE
...
RCA
Gain Offset
5 dB
-76 dBV
5 min.
50 kΩ
2.0 V
Detection threshold
Max input voltage
Input impedance
Time-out
Figure 6.3: Rename an input by pressing
and holding its name in the Input menu
6.2.2
Gain Offset
You can change the relative levels of
the individual inputs using the
Gain
Offset
parameter. For example, if you
have a particular source that has a
lower output level than the others, its
Gain Offset can be increase to
compensate, making it appear to have
the same level as your other audio
sources.
Range
-12 to 12 dB
Resolution
1 dB
Factory Default
0 dB
Note that the Gain Offset parameter is
not available for the Power Link and
Wireless Power Link inputs.
6.2.3
Detection Threshold
The BeoLab 90 can be set to
automatically turn itself on by
detecting the presence of a signal on
the XLR and RCA line inputs. However,
depending on your source and/or the
style of music you typically listen to, it
may be necessary to make the
detection more or less sensitive. This
can be done using the
Detection
Threshold
control.
For example, if you listen to music with
a large dynamic range, it may be
necessary to lower the Detection
Threshold to make the BeoLab 90 more
sensitive to the presence of quiet
signals. Conversely, if you have an
audio source that has a higher noise
floor, it may be necessary to increase
the Detection Threshold in order to
make the BeoLab 90 less sensitive.
Range
-76 to -46 dBV
Resolution
3 dB
Factory Default
-76 dBV
See Figure
for a graphic
representation of the the detection
threshold relative to the signal
strength.
Note that the Detection Threshold
parameter is not available for the
Power Link input, since the
loudspeaker is automatically turned on
and off by the Power Link source.
Note that, for the USB Audio, S/PDIF
and Optical digital inputs, the
Auto-detection
control is used instead
of the
Detection Threshold
.
6.2.4
Auto-detection
The BeoLab 90 can be set to
automatically turn itself on by
detecting the presence of a signal on
its digital inputs by setting the
Auto-detection
to ON. However, this is
slightly different from the detection of
analogue signals, since the digital
inputs are triggered by the presence of
a any non-zero signal on the digital
audio stream rather than a signal
above a user-defined level .
Options
On / Off
Factory Default
On
Note that the Auto-detection
parameter is only available for the USB
Audio, S/PDIF and Optical inputs.
Note that, for the XLR and RCA
analogue inputs, the
Detection
Threshold
control is used instead of the
Auto-detection
.
6.2.5
Maximum Input Voltage
Different audio sources have different
maximum analogue output levels.
Typically, a maximum level from a
line-level RCA output is 2.0 V RMS,
however, different manufacturers
occasionally choose to deliver a higher
output level on some models.
In order to maximise the
signal-to-noise ratio of your audio
system, the BeoLab 90 gives you the
option to change the Maximum Input
Voltage for the the XLR and RCA line
inputs. The datasheet for your audio
source should indicate its maximum
output level. The value in the BeoLab
90 interface should be set to match
this value.
If the source has a higher maximum
output level than that which is set in
the BeoLab 90 interface, this may
cause distortion due to clipping of the
signal at the loudspeaker’s inputs.
If the source has a lower maximum
output level than that which is set in
the BeoLab 90 interface, this will cause
your maximum output of the
loudspeaker to be lower, and the
output noise floor to be increased.
Options
2.0, 4.0, 6.5 V RMS
Factory Default
2.0 V RMS
Note that the Maximum Input Voltage
parameter is only available for the XLR
and RCA line inputs.
6.2.6
Time-out
In cases where the automatic signal
detection is used to turn the on BeoLab
90, the
Time Out
control can be used
to determine the length of time the
loudspeaker continues to be powered
up after the audio signal has stopped.
It may be necessary to increase the
length of this time if you listen to
music with an extreme dynamic range.
For example, a quiet passage in a
piece of music may be below the
detection threshold. If the duration of
that passage is longer than the
Time
Out
value, then the loudspeaker will go
into standby mode while the piece is
playing.
Options
0 - 840 seconds
Note that the Time-out function is not
available for the Power Link, Wireless
Power Link and WiSA inputs.
29