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5
INTRODUCTION
Permanent installations require solutions which offer a visually discrete design that blends into the background while still being flexible and versa
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tile in their functions. You need to be able to connect different audio sources and manage them, to mute non-priority signals during announce-
ments or emergency calls.
The PRE ST 1 is a 4-channel multi-functional stereo mixer preamplifier that allows users to mix 2 microphone/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 Bluetooth 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
CONNECTIONS, CONTROLS AND DISPLAY ELEMENTS
+ -/G
1
3
2
XLR m
1
3
2
XLR m
2
6
3
8
9
5
7
4
1
1
POWER CONNECTOR
IEC socket to the power supply of the device (power cable included in the packaging).
2
FUSE
Fuse holder for 250 V fuses (5 × 20 mm). IMPORTANT NOTE: Only replace the fuse with a fuse of the same type (see note on the housing). If the fuse
blows repeatedly, please contact an authorized service center.
3
ON/OFF
Rocker switch to turn the device on and off.
Summary of Contents for LDPREST1
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