The LBB1938/30 is a powerful 480 W power amplifier in a 3U high 19” case for rack mounting or tabletop use. LEDs on the front panel show the status of the amplifier: power, audio output level, and supervised functions. This high-performance unit fulfils a wide range of public address requirements at a surprisingly low cost.

• 480 W power amplifier in a 3U high 19” housing
• EN 54‑16 certified
• 70 V / 100 V and 8 Ohm outputs
• Dual inputs with priority switching
• 100 V input for slave operation on 100 V speaker
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The LBB1938/30 is a powerful 480 W power amplifier in a 3U high 19” case for rack mounting or tabletop use. LEDs on the front panel show the status of the amplifier: power, audio output level, and supervised functions. This high-performance unit fulfils a wide range of public address requirements at a surprisingly low cost.

The LBB 1956/00 call station is a stylish, high-quality call station with a stable metal base design, a flexible microphone stem and a unidirectional condenser microphone. It can make calls to selected zones (one to six and all-call) in a public address system built with the Plena Voice Alarm System. In addition to tabletop use, the special design allows it to be neatly flush mounted in desktops. The LBB 1957/00 Plena Voice Alarm System Keypad is an extension adding seven additional keys.

The LBB 1957/00 Call Station Keypad is an extension to the LBB 1956/00 Plena Voice Alarm System Call Station that adds seven additional zone-select keys. It has the same stable metal base as the call station. In addition to tabletop use, the special design allows it to be neatly flush-mounted in desktops.

The LBB1990/00 Voice Alarm Controller unit is the heart of the Plena Voice Alarm System. It is the basis of the Plena Voice Alarm System, and has all the essential functionality for compliance with the EN 54‑16 standard, including full system supervision, loudspeaker line impedance supervision, a supervised emergency microphone on the front panel and a supervised message manager.

The LBB1992/00 Voice Alarm Router is an expansion unit that can add six zones and 12 input contacts to the Plena Voice Alarm System. It can use the built‑in amplifier on the LBB1990/00 Plena Voice Alarm System Controller, and provides inputs and outputs for one or two amplifiers in a multi‑amplifier one or two‑channel system.

The Plena Voice Alarm System remote control panel allow the system to be controlled remotely from one or two remote locations. There are five models available:
• The fireman’s panel, which has oversized, illuminated controls and an all-call function
• The main RC unit, which duplicates the front panel of the Plena Voice Alarm System Controller
• The RC extension, which duplicates the front panel of the router
• The main RC kit
• The RC extension kit
The kits are a functional match to the remote control and the RC extension, with connectors on the front panel instead of controls and indicators.

The PLN-24CH12 Battery charger, 24V makes sure that the system batteries are always charged in public
address and emergency sound systems. Rack mountable, the unit charges lead‑acid batteries and simultaneously provides 24 V for system components. The battery charger is fully compliant and certified to EN 54‑4. The battery charger is a microprocessor controlled device of premium quality.

• Flexible power partitioning across all channels
• Low power consumption and heat loss
• Full supervision with integrated fail‑safe redundancy
• Digital signal processing per channel
• IP‑networked on OMNEO for audio and control

This is a flexible and compact multi‑channel power amplifier for 100 V or 70 V loudspeaker systems in Public Address and Voice Alarm applications. It fits in centralized system topologies, but also supports decentralized system topologies because of its OMNEO IP‑network connection, combined with DC‑power from a multifunction power supply.
The output power of each amplifier channel adapts to the connected loudspeaker load, only limited by the total power budget of the whole amplifier. This flexibility, and the integration of a spare amplifier channel, makes it possible to utilize the available power effectively and use less amplifiers for the same loudspeaker load, compared to using traditional amplifiers.
Digital sound processing and control, adjusted to the acoustics and requirements of each zone, allow for better sound quality and speech intelligibility.

• Flexible power partitioning across all channels
• Low power consumption and heat loss
• Full supervision with integrated fail‑safe redundancy
• Digital signal processing per channel
• IP‑networked on OMNEO for audio and control

This is a flexible and compact multi‑channel power amplifier for 100 V or 70 V loudspeaker systems in Public Address and Voice Alarm applications. It fits in centralized system topologies, but also supports decentralized system topologies because of its OMNEO IP‑network connection, combined with DC‑power from a multifunction power supply. The output power of each amplifier channel adapts to the connected loudspeaker load, only limited by the total power budget of the whole amplifier. This flexibility, and the integration of a spare amplifier channel, makes it possible to utilize the available power effectively and use less amplifiers for the same loudspeaker load, compared to using traditional amplifiers. Digital sound processing and control, adjusted to the acoustics and requirements of each zone, allow for better sound quality and speech intelligibility.

• Solid housing for surface-mounting or flush mounting
• Omni‑directional MEMS microphone for noise level tracking
• Digital signal processing to adapt frequency response
• PoE powered device with Gigabit network interface
• Up to four sensors can be combined to cover a large zone

The PRA-ANS is an ambient noise sensor to monitor changing ambient noise levels for automatic adjustment of announcement or background music levels (AVC – Automatic Volume Control). This ensures the public address audio is set at a configurable level above the ambient noise in order to guarantee intelligibility of announcements, yet at a comfortable loudness.

• Advanced functionality for high‑quality announcements, messages, text‑to‑speech, internet radio, music management and scheduled events
• Support of personal devices such as third party PCs and wireless tablets
• Possibility to configure user group profiles for different access levels
• Each connected user device requires one software license

The PRA-APAL is a license code for an operator device to access the advanced public address server PRAAPAS for PRAESENSA. It adds advanced business related public address functions to the function set provided by the system controller. A PC or wireless tablet, connected to the local IP‑network, functions as operator device with an intuitive graphical user interface, controlled by mouse or touch screen. A headset, connected via USB or Bluetooth to the operator device, may be used for voice announcements and audio monitoring. The integrated web server of the PRA-APAS keeps the operator device platform independent. Each operator device uses its own web browser as operator interface.