LD Systems PRE ST 1 Manual De Usuario página 11

the microphone from the device again, deactivate the phantom power and turn the channel volume to
minimum.
GAIN: Control to set the pre-amplification of the corresponding audio signal. Set the Gain control such
that the Clip LED of the channel only lights up briefly when the signal level peaks. Avoid the Clip LED
being permanently lit by reducing the pre-amplification. It may also be necessary to reduce the signal
level on the playback device.
CLIP: The red CLIP LED indicates the input is being operated at the distortion limit. You should reduce
the signal level on the GAIN control or the volume control on the playback device so that the CLIP LED is
no longer lit.
CHIME: The volume for the chime/signal tone is controlled via the CHIME control on the back of the
amplifier. If the control is turned all the way to the left, the chime/signal tone circuit is disabled. If the
internal chime/signal tone function is active, MIC/LINE 1, MIC/LINE 2 and MUSIC channels are muted
for the duration of the signal tone. The signal tone is initiated with the help of a button which is
connected to contacts C and + of the MIC/LINE 1 channel.
Adjust the volume of the channel using control 2 on the front of the device.
MUSIC
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Stereo line channel for the connection of playback devices such as a CD or MP3 player. The MUSIC
channel includes a Bluetooth module. RCA sockets are provided on the back for connecting two stereo
line input signal sources (CD symbol or cable symbol). The desired signal source is selected using a
touch-sensitive button on the front of the amplifier. Adjust the volume of the channel using control
MUSIC on the front of the device.
LINE OUT
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The balanced stereo line output LINE OUT with terminal block connection is used to send the audio
output signal to an external amplifier or active loudspeaker system. Pin assignment: LEFT +, LEFT -, G
(Ground), RIGHT +, RIGHT - (terminal block in packaging content).
BASS/TREBLE: The tone settings of the output signal can be applied by using the BASS and TREBLE
controls.
ST/MONO: The output of the audio signal can either be in stereo (ST) or in mono (MONO). If the switch is
set to MONO, the corresponding audio signal is summed to mono at both outputs LEFT and RIGHT.
STANDBY ON/OFF
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If the standby function is activated (STANDBY in ON position), the amplifier is automatically set to
standby mode if there is no audio signal for 20 minutes. This reduces power consumption considerably.
As soon as there is an audio signal, standby mode is automatically ended and the amplifier is once
again operational after around 3 seconds (the STANDBY LED flashes white on the front of the device
when starting). If the STANDBY LED is solid white, the device is ready for use. The LED is lit red in standby
mode. In addition, the device can also be switched to standby mode manually by pressing the standby
button on the front. In this case, auto standby mode is deactivated and the device no longer starts
automatically.
Please note: The standby circuit analyses the connection status of the Bluetooth unit. When a Bluetoo-
th connection to an auxiliary device (smartphone, tablet) is detected, and Bluetooth is selected as the
signal source, the device will not automatically go into standby mode.
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