Data Sheet

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Proven Lab.gruppen Technologies
VHF (very high frequency) protection, DC protection and voltage-and
current-clip limiting. None of the limiters introduce slow, long term
gain changes that can risk altering the balance of a tuned system.
A Breaker Emulation Limiter (BEL) prevents power interruption while
Under-Voltage Limiting (UVL) allows continued operation despite
severe voltage drops. The Regulated Switch Mode Power Supply
(R.SMPS) connects to any mains supply in
the world. The design also
incorporates power factor correction (PFC) to reduce peak current
draw from the mains. In addition, the inherent rail regulation maintains
stable rail voltages during extended bursts; extreme low-frequency
beats will not affect mid- and high-frequency headroom.
SUB
LOW
MID
HIGH
PLM+ Series - Amp channels power adjusted to match the loudspeaker requirements
SUBS
LOW FREQUENCY
DRIVERS
MID FREQUENCY
DRIVERS
HIGH FREQUENCY
DRIVERS
Amplifier Power Required
Frequency
Rational Power Management (RPM)
On top of the outstanding performance users have come to
expect from a PLM, the PLM+ series also contains Rational Power
Management (RPM), a proprietary Lab.gruppen technology that gives
system designers and techs unprecedented freedom to allocate the
output power available on each channel for optimum performance
equipment costs, reduce rack space and improve long-term energy
RPM enables the re-allocation of total output power capacity among
the four channels. For example, any channel of the 12K44 model can
supply up to 5900 W, with the provision of keeping within the total
From within the CAFÉ software, RPM allows the desired power
demand to be calculated for the various loads in several different
ways. RPM then analyses the desired power in relation to the channel
and device constraints across the two PLM+ models, and guides th
e
system designer towards the most effective way to power the PA.
PLM+ SERIES: Technology Overview
Equipped with the Intercooler cooling system (12K44 and 20K44 only),
these amplifiers dissipate heat more effectively and eliminate “end of
tunnel” output device over-temperature problems. PLM+ also offers a
full suite of protection features, including thermal “show-must-go-on”
limiting, short circuit protection, excessive average current limiting,
sustained
Reliability, durability, sound quality and pure power remain the
fundamentals for any touring amplifier, and in this regard
PLM+rigorously maintains Lab.gruppen’s industry-leading reputation.
The 12K44 and 20K44 amplifiers output stages are the Lab.gruppen
patented Class TD
®
which couples the efficiency of Class D topologies
to the sonic purity of Class A/B designs. The 5K44 uses a newly
developed Class D technology design with increased efficiency and
sustained sonic performance.
power outtake of 12000 W (up to 2000 W for the 5K44). The maximum
output channel(s) can be used for power-hungry low-frequency
systems, while the remaining output power can be allocated as
needed for the mid-frequency and high frequency drivers, providing
a smarter and more efficient way to distribute total power across any
large scale PA.