Data & Facts
Object
Rosenheim town hall
Koenigstr. 24
83022 Rosenheim / Germany
Implementation
PHOENIX Professional Audio GmbH
Period
2025
Fig.: MPS-8Z – Microphone desktop station acc. to DIN EN 54-16
Setup by 
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EN54 PA/VA systems from “Gräf + Meyer”
- EN54 amplifier: 4 x ONE 500 Voice alarm compact system acc. to EN 54-16 and EN 54-4, 6 x 100V loudspeaker circuits; 500W music power with integrated emergency management, digital audio matrix, 3 priority-controlled audio inputs; display; access control; integrated battery management; Wall, table, or rack mounting + ONE LOOP 04 Expansion modules (Master Unit and 3 additional ONE Units) + ONE BC1 Emergency power supply license cards
- Accessories: ONE Batteries 12/18Ah Gas-tight and maintenance-free lead-acid batteries for the ONE 500 voice alarm compact system + ONE RMA 19″ – Rack mounting sets
- Intercom station: MPS-8Z Microphone desktop station acc. to DIN EN 54-16, digital 8-button system intercom station; selection of zones/groups; event triggering; expandable to up to 64 buttons using MPS-8K; Collective call button; busy indicator; pre-bell chime; adjustable microphone volume; includes power supply
- Other: 24 x EOL TFL-2 Speaker lines “END OF LINE module”, enables the precise measurement of the line impedance of speaker lines 70V/ 100V + 1 x LKV IN Basic (master) basic connection module of the internal cable/speaker circuit distribution of a master rack; pre-mounted on a DIN rail and labeled; For rear mounting in the rack for 7 speaker zones with A/B cabling, RST/EMG/FLT, 24VDC power supply, 6 detector lines, RJ45 connection block for installation cabling + 3 x LKV IN Basis (slave) basic connection modules for the internal cable/speaker circuit distribution of a slave rack; pre-mounted and labeled on a DIN rail; for rear mounting in the rack for 7 speaker zones with A/B cabling, 24VDC power supply
- Installation / User Instructions
- Documentation
Project description
Renewal of the town hall’s VA /
Electroacoustic Emergency Warning System
At the beginning of 2025, Phoenix Professional Audio comprehensively upgraded the public address system at the town hall in Rosenheim (Bavaria). The existing system was removed and a new Voice Alarm (VA) System, certified according to EN 54-16, was installed.
Phoenix PA was responsible for the setup, leveling, and programming of the entire PA/VA system.
Numerous public buildings have PA systems installed, which function as VA systems in the event of a fire and as electroacoustic emergency warning systems in the event of other hazards.
The voice alarm system at Rosenheim Town Hall plays a crucial role in the safety of its citizens. It is an essential component of the fire alarm system and is activated both automatically and manually. In an emergency, the VA system enables people to be quickly warned and clear evacuation instructions to be given.
Pre-recorded voice announcements or live announcements are broadcast over loudspeakers. This ensures that everyone present is informed promptly and accurately, enabling panic-free action and safely coordinating the evacuation. The PA/VA system is therefore essential for the protection and security of the town hall.
The centerpiece of the new PA/VA system installed by Phoenix PA is a rack containing four units of the “ONE-500” PA and voice alarm system from partner Gräf + Meyer. The ONE-500 is a comprehensive audio management system compliant with EN 54-16 / EN 54-4, integrating both Class-D amplifiers and an emergency power supply including a battery into a 2U enclosure.
The ONE system impresses with its powerful features designed for professional audio applications, ensuring excellent sound quality and sufficient volume for a wide variety of locations.
Fig.: ONE – PA/VA System, EN 54-16 certified
The ONE-500 system’s 6 independent audio outputs enable flexible control of different speaker zones, while the 3 priority-controlled audio inputs with noise gate function effectively filter out background noise, thus increasing speech intelligibility.
A DSP equalizer integrated into the system ensures that the sound can be individually adjusted to optimally meet the acoustic requirements of the respective environment.
The 6×6 digital audio matrix allows for flexible management of various audio sources and routing them to different outputs. Of particular note is the emergency text memory (Dual Message Player), which enables the playback of recorded messages, alarm, and pre-alarm tones, thus supporting rapid response in critical situations.
In addition, up to 8 system microphone desktop stations can be connected to the ONE-500 system, further improving communication within the system and providing versatile application possibilities.
In addition to the ONE-500 voice alarm compact systems, ONE LOOP 04 expansion modules (master unit and three additional ONE units), ONE BC1 emergency power supply license cards, EOL TFL-2 speaker lines, and an EN 54-16-certified MPS-8Z microphone desktop station were deployed in Rosenheim Town Hall.
Compliance with relevant standards and building regulations is of utmost importance when planning and installing voice alarm systems. Through careful planning, Phoenix Professional Audio ensured that all requirements were met. This includes, among other things, compliance with DIN standards, which ensure that the systems function reliably and enable clear and intelligible voice transmissions in an emergency.
In addition, the specific requirements regarding acoustics, technical design, and integration into existing systems were observed. This precise approach maximized the safety and efficiency of the voice alarm system in Rosenheim Town Hall.
About us
With over 30 years of expertise and +3000 projects implemented worldwide, PHOENIX Professional Audio has specialized in the field of professional PA – with a particular focus on church acoustics & public address sound reinforcement. For managing director and project manager Peter M. Krziwon as well as project manager Harald Seidl, perfect speech intelligibility and music reproduction are the highest demands – especially in acoustically demanding rooms such as churches.
PHOENIX ON SOCIAL MEDIA
