The LD Systems PRE ST 1 is a 4-channel multi-functional stereo mixer preamplifier designed specifically for permanent and commercial audio installations where reliability, priority handling, and discreet design are essential.
It allows seamless mixing of two microphone/line inputs, an emergency line input, and three selectable music sources, including Bluetooth 4.0. A flexible four-level priority system, combining contact closures and VOX audio detection, ensures critical announcements and emergency signals automatically override lower-priority audio sources.
The PRE ST 1 is equipped with priority contacts that mute non-essential signals during announcements or emergency situations, making it ideal for retail, hospitality, corporate, education, and public address environments. A balanced stereo line output with mono/stereo switching, rear-panel tone controls, and automatic standby mode complete a highly efficient and installer-friendly solution.
Key Features
4-channel stereo mixer preamplifier for installation use
Emergency line input with priority contact closure
2 mic/line inputs with mic/line switching
Switchable 24 V phantom power on mic/line channels
Priority contact closure and switchable chime function
3 music sources:
2 × stereo line inputs (RCA)
Bluetooth 4.0 audio interface
Gain control and clip LED indicators on emergency and mic/line inputs
Balanced stereo line output with mono/stereo switch (terminal block)
Separate bass and treble tone controls on rear panel
4 priority levels for flexible system integration
Auto standby mode for reduced power consumption
Intuitive front-panel controls and clear rear-panel layout
Compact 9.5″ format for easy installation
Applications
Commercial audio systems
Retail and hospitality venues
Education and corporate facilities
Paging and background music systems
Emergency and announcement systems
Notes
Mixer preamplifier only
Designed for permanent installation
Power supply and accessories as per manufacturer specification
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