Plena VAS

Olefins present BOSCH Plena mixer amplifiers are high performance, professional public address units with modern state of the art features.

They are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment.

Providing a crisp call or clear music is as easy as turning on the radio.

The amplifier is also surprisingly affordable, without sacrificing features such as ducking, priority and flexibility.

Some other unique features include an innovative labelling system with a printable template (on disk included) and insert-able grey and red pins, to indicate optimal volume sets around the knobs.

2u rack ears included.

To know more


Plena Voice Alarm 3.0

With release 3.0 of the Plena Voice Alarm, Bosch ensures full compliance with the EN54-16 and ISO 7240-16 for an extended number of 120 zones. And besides offering a full compliant system to the end user, consultant and installation company, the Plena Voice Alarm system can now be configured from the latest Windows PCs and on-line software is offered to enable straightforward system design.

Designed as a versatile solution, the Plena Public Address and Voice Alarm System features a standalone plug-and-play concept easy to set up and control. For flexible system control, the remote control panels duplicate the Plena Public Address and Voice Alarm’s user interface.

Slim solution, broad application

Based on a Plena voice alarm controller unit it can handle up to 6 zones with a built-in message manager, emergency microphone and a built-in 240 W power amplifier.

When connecting easy to install, 6-zone routers to the Plena voice alarm the number of zones extends to a 120-zone capacity. The power per zone is freely distributable per zone and is can be over 1000 Watts per router (or 6 zones).

In addition, 8 call stations with 32 call station keypads with programmable keys can be interconnected for message routing. Additional Plena amplifiers can be added to create two-channel systems.


• 4 microphone/line inputs, plus 3 music source inputs

• 100 V and telephone input with priority & VOX

• Announcement only output, 3-wire volume override

• Voice-activated emergency override

• Output power 30 Watts/60 Watts/120 Watts/

The Plena tabletop microphone is a stylish, high quality tabletop unidirectional condenser microphone, intended for making calls in a public address system. Its heavy metal base and rubber feet ensure stability on any flat surface. The special design also allows the unit to be neatly flush-mounted in desktops.

  • PTT-key for calls for activation
  • Momentary or toggle
  • Green LED, indicating microphone active
  • Stable metal base design with fixed 2 m cable and lockable Euro style connector
  • Phantom powered by amplifier

The PTT-key (press-to-talk), not only switches on the microphone, but also provides priority contacts, that are compatible with the Plena range of amplifiers. The switching characteristic of the PTT-key can be configured internally for PTT-mode (on as long as pressed) or toggle-mode (press to switch on, press again to switch off).

It is equipped with a fixed, flexible 2 m cable and a 5‑pin Euro style connector for the balanced signal and the priority contact. If the priority contact is not required, the microphone can be connected to amplifiers with 3‑pin Euro style connector. A green LED indicates when the microphone is active.

The Plena two-zone call station is a modern, 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 in a public address system built with the PLE series two-zone mixer and mixer amplifiers. In addition to tabletop use, the Plena design allows neat flush-mounting in desktops.

  • Modern two-zone call station for the PLE series
  • Selectable gain
  • Speech filter and limiter
  • Output level control
  • Loop-through option for up to 8 call stations
  • LED indications for zone selection, busy, and power on


Gain, speech filter and intelligibility
This call station features selectable gain, a selectable speech filter, and a limiter for improved intelligibility.

The call station has a balanced line level output, giving it a maximum range of 200 meters from the mixer, when using CAT-5 extension cables.

With the loop-through RJ-45 connector, it is possible to daisy chain multiple call stations.

The priority is automatic i.e. the call station nearest the mixer has priority and can override a call station further from the mixer. When a call is being made by a higher priority call station, a yellow light will display on the lower priority call stations.

The Plena 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. Inaddition to tabletop use, the special design allows it to be neatly flush-mounted in desktops. The Plena Voice Alarm Keypad (LBB 1957/00) is an extension adding seven additional keys.

  • Stylish six-zone call station for the Plena Voice Alarm System
  • Six zone selection keys, all-call key and momentary PTT-key for calls
  • Selectable gain, speech filter, limiter, and output level for improved intelligibility
  • LED indications for zone selection, fault, and emergency state
  • Call station extension provides seven additional zone and zone group keys

The keypad is an extension to the LBB 1956/00 Plena Voice Alarm 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.

  • Seven zone selection keys
  • LED indications for zone selection
  • Up to eight keypads can be connected together