The Bosch LBB1990/00 is the heart of the PLENA Voice Alarm System: six zones on board, up to 120 zones with routers, a built-in 240 W amplifier and message manager, supervised emergency microphone, EN 54-16 certified. Scroll down for details.

The Bosch LBB1992/00 adds six zones and 12 input contacts to the PLENA Voice Alarm System, with one or two amplifiers for calls and background music at the same time. EN 54-16 certified. Scroll down for details.

The Bosch LBB1938/30 is the 480 W power amplifier of the PLENA Voice Alarm System: 70 V / 100 V and 8 ohm outputs, dual inputs with priority switching, EN 54-16 certified, 3 U. Scroll down for details.

The Bosch LBB1935/20 is a 240 W PLENA power amplifier in a 2 U housing: 70 V / 100 V and 8 ohm outputs, dual inputs with priority switching, 100 V input for slave use. Scroll down for details.

The Bosch LBB1930/20 is a 120 W PLENA power amplifier: 70 V / 100 V and 8 ohm outputs, two line inputs with priority switching, 100 V input for slave use. Scroll down for details.

The Bosch LBB1956/00 is the PLENA six-zone call station: zone, all-call and PTT keys, condenser microphone on a flexible stem, selectable gain, speech filter and limiter; up to 8 LBB1957/00 keypads. Scroll down for details.

The Bosch LBB1957/00 adds seven zone keys with LEDs to the LBB1956/00 call station; up to eight keypads per station, same metal base, flush-mountable. Scroll down for details.

Bosch LBB1965/00 Message manager, A high-performance, highly versatile stand-alone digital message player, Up to 12 messages and 12 trigger inputs, Supported sample rates (fs): 24 / 22.05 / 16 / 12 / 11.025 / 8 kHz, 230/115 VAC, ±10%, 50/60 Hz.