16 | K Series | User guide
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 K2 and K3 and from 15 A to 32 A range for all
other K amplifiers.
Setting the maximum mains current determines the cur-
rent 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 deac-
tivated unless the limiting function is implemented by an ex-
ternal device such as digital system controllers. In this case,
it is extremely important to correctly set limiting parameters
in order to preserve loudspeakers from excessively power-
ful 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 permanently 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.
Max mains current
back
fast
-
+
23 A rms
FIGURE 23: Max mains current.
Max mains current
back
sel
Clip Limiter CH1:ON
Clip Limiter CH1:ON
FIGURE 24: Clip limiters.
Idle state timeout
ok
-
+
22 min
slow
FIGURE 25: Idel state timeout.
