Welcome; Introduction; Main Features; Amplifier Platform - Lab.gruppen PLM series Operation Manual

4. Welcome

4. Welcome

4.1 Introduction

Thank you for choosing the Lab.gruppen PLM Series of Powered Loudspeaker Management systems for
your sound reinforcement needs. We are confident that you will be pleased with the performance, unique
features, configuration flexibility, reliability, and long-term durability offered by PLM Series products.
To facilitate timely installation and use of this PLM Series product, your welcome package includes a printed
copy of the PLM Series Quick Start and Field Reference Guide. It contains the basic information needed to
safely install a PLM system and place it in service. Control and editing features are accessible either via the
intuitive front panel interface or remotely, with the included Lake Controller software package.
We do, however, highly recommend reading through all of the product documentation on the included CD
ROM in its entirety. As you become thoroughly familiar with the many configuration and control options
available in PLM Series products, you may learn about features and options that will affect your choices of
operational modes or loudspeaker system configurations.
Thank you again for placing your confidence in Lab.gruppen products.

4.2 Main Features

The PLM Series incorporates a number of sophisticated technologies to ensure the best possible perfor-
mance and many years of reliable operation. The following section summarizes the benefits of each feature,
and gives a reference to the corresponding section in this or other manuals.

4.2.1 Amplifier platform

The PLM Series power output section is built on the foundation of Lab.gruppen's robust, road-proven
FP+ Series amplifiers. Features in common with the FP+ Series include extraordinary power density,
patented Class TD® output stages, Regulated Switch Mode Power Supply (R.SMPS™), the high-efficiency
Intercooler® copper-finned cooling system, and a full suite of protection features. Signal inputs are analog,
AES digital, and Dante digital audio network; loop-through outputs or redundant pairs are provided for each
input type. (See section 6.2.)
4.2.2 Amplifier DSP: Gain, ISVPL , load verification and performance monitoring
™
Input gain (sensitivity) is set in the digital domain in the PLM Series, controllable through the Lake Controller
software or the front-panel interface. The DSP-implemented Inter-Sample Voltage Peak Limiter (ISVPL)
tailors each power output to the characteristics of the connected load. (See section 7.3.1.)
The on-board DSP also implements a comprehensive set of proprietary tools developed by Lab.gruppen for
load verification and real-time performance monitoring. These functions utilize LoadLibrary, a comprehensive
database for each loudspeaker component of the connected load (usually one or more band-limited drivers
in a multi-way system). Using this data and a brief test signal, LoadSmart then compares actual response
to predicted response, identifying any malfunctioning components or connection errors. During the actual
performance, SpeakerSafe™ monitors real-time load status, including temperatures of the PLM amplifier
stages as well as magnets and voice coils of connected loudspeakers. This allows operators to avoid power
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PLM Series Operation Manual rev 1.1.3