Operation Manual

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Signal Flow and Lake® Processing
PLM Series Operation Manual Rev 1.3.0
Each Module can be congured as a Classic Crossover (Bessel, Butterworth, Linkwitz-Riley), as a Linear
Phase Crossover, or as multiple full bandwidth Auxiliary Outputs. The default conguration for the PLM is
2 x 2-Auxiliary Output Modules, providing a total of four Module outputs.
Please refer to the Lake Controller Operation Manual for further information.
6.4.2 LoadLibrary
™
and Fingerprints
In addition to the standard loudspeaker presets (Module les), the Lake Controller also includes a set of
enhanced Module les specically for use with the PLM Series.
These supplementary PLM Module les, known as the LoadLibrary incorporate both Lake DSP parameters
along with PLM specic data; LoadLibrary Module les include parameter settings for the PLM’s Amplier
Gain and ISVPL limiter. Additionally, LoadLibrary loudspeaker types may also include data relating to the
electrical characteristics of a particular loudspeaker.
Electrical characteristic data is used to enable load verication (LoadSmart) and monitoring facilities
(SpeakerSafe) to be performed on the PLM. This data set is termed a Fingerprint. When a PLM-specic
loudspeaker type is loaded, its Fingerprint load characteristics are included. These load characteristics are
stored in a le with a “.mdl” sufx and are loaded simultaneously with the module le.
LoadLibrary Modules and standard Module les are cross-compatible, although when a LoadLibrary Module
is loaded into a legacy Lake product the extra data within it is ignored.
6.4.3 Super Modules
Super Modules allow control of multiple Modules of the same type, distributed across multiple Frames, as
a single entity within the Lake Controller software. A change made in the Super Module is replicated across
all assigned Modules, resulting in improved efciency in system conguration and a reduction of on-screen
icons within the Lake Controller software.
The key benet of this feature is the ability to connect and control crossovers, levels and EQ across multiple
hardware devices simultaneously from the Lake Controller. For example, one device may be driving sub and
low-frequency speakers, while another device controls mid-range and hi-frequency drivers. Using a single
adjustment the crossover points between the two devices can be changed simultaneously.
Please refer to the Lake Controller Operation Manual for further information regarding Super Modules.
6.5 Loudspeaker Processor Overview
The Lake Processing system within PLM Series devices may be congured with up to two processing
Modules containing a total of up to six processing Module outputs, although the number of power outputs
will be either two or four depending on the PLM model being used. To make use of the extra processing
channels, multiple hardware devices may be connected together using the Super Module feature as sum-
marized in section 6.4.3.