the Plena range, there are three types of Plena booster amplifiers.
The LBB1930/00 is a 120W booster amplifier, the LBB1935/00
is a 240W booster amplifier and the LBB 1938/00, the new 480W
booster amplifier. All are high performance mono amplifiers
capable of fulfilling a wide variety of public address requirements
for surprisingly low cost. The LBB1930/00 and the LBB1935/00
use the same compact 19", 2U high housing tabletop use
and rack mounting, while the LBB1938/00 uses a 3U rack mount
kit. A temperature controlled fan ensures high reliability
at high output power and low acoustic noise at lower output
Plena booster amplifiers have 70V and 100V outputs for constant
voltage loudspeaker system and low impedance output for 8
ohm loudspeaker loads. The amplifiers are protected against
overload and short circuits.
balanced loop through connector arrangement facilitates easy
connection of multiple booster amplifiers to increase the
available output power. An additional 100V line input is provided
to connect the booster amplifier to a 100V loudspeaker line,
for additional output power e.g. on remote locations. Sensitivity
or level control is on the rear of the unit to avoid accidental
setting change. A VU-meter with LED-bar shows the output level.
Plena booster amplifiers operate both on mains power and on
24V battery power supply for emergency backup