LD Systems PRE ST 1 Manual De Usuario página 8

INTRODUCTION
Permanent installations require solutions which offer a visually discrete design that blends into the
background while still being flexible and versatile in their functions. You need to be able to connect
different audio sources and manage them, to mute non-priority signals during announcements or
emergency calls.
The PRE ST 1 is a 4-channel multi-functional stereo mixer preamplifier that allows users to mix 2 micro-
phone/line sources together with an emergency line input and one of the 3 music sources available,
including a Bluetooth receiver. These versatile connection options together with a four-level priority
system, that combines contact closure inputs and VOX audio detection circuits, guarantees a seamless
integration in almost any commercial audio application.
PRE ST 1 is equipped with two priority contacts: one for the emergency input, which mutes all the other
signal sources, and one for the microphone inputs, which mutes the music signal sources. The stereo
balanced line output includes a mono/stereo switch and separate tone controls for bass and treble. An
automatic standby mode can also be activated in order to further reduce energy consumption when
the device is not used.
The intuitive design of its control panel ensures an easy operation, with input and master volume
controls, clear signal level and priority indications, and a practical music source selection and Blue-
tooth pairing activation via capacitive buttons. On the other hand, the clarity of the rear panel and the
compact 9.5" format ensures that the preamplifier can be easily installed.
FEATURES
• Line input for emergency signal with contact closure
• 2 Mic/line input terminal blocks with microphone/line switching and switchable 24-V phantom power
• Priority contact closure and switchable chime function for mic/line channels
• 3 stereo music sources: 2 line inputs with RCA sockets plus Bluetooth 4.0 interface
• Gain control and Clip LED for emergency and Mic/Line inputs
• Balanced stereo line output (terminal block) with mono-stereo switching
• Separate tone controls for treble and bass on the rear panel
• 4 priority settings for versatile integration options
• Switchable auto standby mode to save energy
• User-friendly control interface - intuitive operation via capacitive controller (choice of music source
and Bluetooth pairing)
• Easy installation thanks to the clear layout and labeling of the connections and controls on the back
• Universal wide-range switching power supply
• Format: Half rack width, 2 RU
• Optional: Rack installation kit (IMA RK) for the installation of one or two PRE ST1 or IMA 30/60 units in
a 19" rack
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