Manual
5. Operation and performance
PLM+ SERIES Operation Manual rev 1.0.0
17
5.2.2. Rational Power Management™
Rational Power Management™ (RPM) is a unique Lab.gruppen feature that allows for exible allocation of power
across channels of a PLM+. Power that is not used by one output channel is free for use by another output
channel with greater demands. RPM allocates power up to the total limits of the specic amplier model. RPM
exists in two modes. See the image below.
PLM+ Series - Amp channels power adjusted to match the loudspeaker requirements
3000 W
MIDSUB
LOW
HIGH
Figure 5.2: PLM 12K44 - Amp channels power adjusted to match the loudspeaker requirements
Auto RPM: The frame will automatically allocate power per output channel according to the ISVPL settings in the
speaker preset (per module output) in Lake Controller. If the ISVPL settings taken together allow total output higher
than the capabilities of the amplier, RPM will reduce the ISVPL limiter thresholds evenly based on a proportional
reduction in dB. When RPM is active, an RPM icon will be displayed next to the “Actual ISVPL” values in the
Events & Control section. If actual ISVPL is above the normal platform maximum and equals speaker threshold, the
RPM indicator will be green. If actual ISVPL is above normal platform maximum but below speaker threshold, the
RPM indicator will be yellow.
Custom RPM: The CAFÉ software allows users to create an advanced custom power allocation scheme.
Switching to Custom mode disables the Automatic mode. When RPM is active an RPM icon will be displayed
next to the “Actual ISVPL” values in the Events & Control section. Please nd more information about this in
documentation supplied with the CAFÉ software download.
RPM limitations: PLM 20K44 allows all four channels to deliver Channel Max output voltage of 194V.
PLM 12K44 allows two channels to deliver Channel Max output voltage of 194V.