Void Bias V3 User Manual - page 22
9.5 Amplifier settings: Max mains current
The maximum current the amplifier can draw from the mains
can be set by the user through the front panel of all K Series
amplifiers.
The “+” and “-” buttons allow setting of the value of the max
rms mains current. Acceptable values are within the 8 A to 16
A for Bias V3 and from 15 A to 32 A range for Bias V9.
Setting the maximum mains current determines the current
threshold at which a C-Type current breaker will trip.
9.6 Amplifier settings: Clip limiter CH1/CH2
The clip function can be used to prevent distortion caused by
clipping of the output signal.
Please note that clip limiters can be set independently for both
channels.
CAUTION: disabling clip limiters can
potentially damage loudspeakers.
The amplifier’s internal clip limiters should not be deactivated
unless the limiting function is implemented by an external
device such as digital system controllers. In this case, it is
extremely important to correctly set limiting parameters in or-
der to preserve loudspeakers from excessively powerful and
potentially hazardous driving signals.
9.7 Amplifier settings: Gate CH1/CH2
This function allows to mute the amplifier channels individually
if the input signal amplitude falls below the threshold shown in
Gating the output is delayed by 5 seconds after the input signal
falls below the threshold. If the channel is muted, the bottom
green LED in the corresponding front panel LED column is off.
Gain
dBV
dBu
26 dB
-54
-52
29 dB
-57
-55
32 dB
-60
-58
35 dB
-63
-61
TABLE 6: Gate threshold vs gain.
9.8 Amplifier settings: Mute at power on
This functions allows the user to automatically mute all channels
when the amplifier is turned on. Toggle the on or off status by
pressing the front panel button below the “sel” label.
If this function is enabled, a “Muted” label will appear at the
main screen next to each channel at the next power on. Press
the button underneath the “mute” label in the front screen to
unmute the channel.
9.9 Amplifier settings: Idle mode
The idle mode function is a power saving feature. When this
function is activated, the output stage is turned off after no input
signal greater than a selected threshold is detected for a user
selectable amount of time, saving about 40 W of power per
channel. This results in reduced heating, longer amplifier and
fans life, and, especially for fixed installations which are perma-
nently turned on, a lower electricity bill. Exiting from idle mode
is quasi-instantaneous.
In order to set the time after which the amplifier enters in idle
mode, push the rightmost button labelled “sel” when the idle
mode line is highlighted. This will open the “Idle state timeout”
screen. Using the central buttons, select the desired time. In the
“slow” mode, a single button press will increase or decrease
the time by one minute. The “fast” mode will bring this up to 10
minute steps. The timeout range goes from 0 to 720 minutes.
Idle state timeout
ok
-
+
22 min
slow
FIGURE 24: Idel state timeout.
Max mains current
back
fast
-
+
23 A rms
FIGURE 22: Max mains current.
Max mains current
back
sel
Clip Limiter CH1:ON
Clip Limiter CH1:ON
FIGURE 23: Clip limiters.
Bias Series User Guide V1.0
Page 16