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 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.
- Line input for emergency signal with priority contact closure
- 2 Mic/line inputs 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 indicator in the emergency and mic/line inputs
- Balanced stereo line output with terminal block connector, and a mono/stereo switch
- Separate treble and bass tone controls on the rear panel
- 4 priority settings for versatile integration options
- Switchable auto standby mode to save energy
- User-friendly front panel control interface, and clear rear panel layout
General
| Product type | Installation mixer preamplifier |
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| Emergency input | 1 balanced line input |
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| Mic/ line inputs | 2 |
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| Music sources | 2 unbalanced stereo line inputs, Bluetooth 4.0 |
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| Line Output Connectors | 1 (Stereo/Mono switchable) |
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| Cooling | Convection |
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| Priority levels | 4 |
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Emergency Input
| Nominal input sensitivity | -3 dBu (Sine 1 kHz, Gain max) |
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| Nominal input clipping | 20 dBu (Sine 1kHz) |
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| Connector | 5-pin Terminal Block, pitch 5.08mm |
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Mic/Line inputs 1-2
| Nominal input sensitivity Mic | -26 dBu (Sine 1 kHz, Gain max) |
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| Nominal input sensitivity line | -2 dBu (Sine 1 kHz, Gain max) |
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| Nominal input clipping Mic | -5 dBu (Sine 1kHz) |
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| Nominal input clipping line | +19dBu (Sine 1kHz) |
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| Phantom power | + 24V, 10mA switchable |
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| Priority Contact closure | +5VDC normally open for dry contact |
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| Connector Mic/Line1 | 1 XLR/6.3mm Jack combo connector, 5-pin Terminal Block, pitch 5.08mm |
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| Connector Mic/Line 2 | 3-pin Terminal Block, pitch 5.08mm, 1 dual RCA Mono Summed |
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Music inputs - CD/AUX
| Nominal input clipping CD/AUX | 8 dBV (Sine 1kHz) |
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| Connector CD/AUX | 2 x dual RCA Mono Summed |
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Line Output
| Outputs | Mono switchable, Stereo Line Level |
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| Max. output level | 16 dBu |
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| Tone controlBass | +/-10 dB (100 Hz) |
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| Tone control Treble | +/-10 dB (10 kHz) |
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Power supply
| Type | SMPS |
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| Operating voltage | 100 V AC - 240 V AC, 50 - 60 Hz |
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| Power consumption (max.) | 6 W |
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| Idle power consumption | 5 W |
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| Standby power consumption | < 1 W |
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| Operating temperature ( non-condensing ) | 0°C - 40°C; < 85% humidity, non condensing |
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General data
| Time to Auto-standby | 20 Min. |
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| Dimensions (W x H x D) ( height with rubber feet ) | 210 x 95 x 266.76 mm |
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| Optional accessories | Rack mounting hardware |
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