Operation Manual
5. Introduction
6
E SERIES Operation Manual rev 2.1.0
5. Introduction
5.1. Welcome
Thank you for choosing a Lab.gruppen E Series product built around Lab.gruppen’s IDEEA
TM
, the IntelliDrive
Energy Efcient Amplier. This manual provides a comprehensive guide to the features and functionality of E Series
model E 12:2, E 8:2 and E 4:2 ampliers. Please read through this manual in its entirety to become fully acquainted
with conguration options and protection circuitry.
This brief summary, in conjunction with Installation (Section 7), contains the basic information needed to safely
install the amplier and place it in service. However, we highly recommend reading through this manual in its
entirety, beginning with Features and Technologies and continuing through to Operation and Performance. As you
become thoroughly familiar with all aspects of operation, you may learn of features or options that will affect your
choices on amplier modes or loudspeaker system conguration.
Lab.gruppen E Series power ampliers are designed and built specically for the unique demands of permanent
installation applications. By packing two channels of efcient recongurable power amplication into a 1U chassis,
the E Series achieves a high power and channel density. The benets include reduced rack space requirements
and minimal heat build-up. The exible output stages enable each amplier channel to be set for either low
impedance or “70 V”-constant voltage (70.7 Vrms = 100 V peak) mode.
Although E Series features and facilities are tailored for installation applications, each amplier draws on the
foundational engineering that has made Lab.gruppen the benchmark of quality for touring concert systems:
exceptional sonic performance, rugged construction, proven reliability, and protection features that anticipate every
unwelcome possibility.
This manual was created for the E Series E 12:2, E 8:2 and E 4:2 amplier models. Any references to “E Series” in
this manual refer to all models in the range.
5.2. Features
Your new E Series amplier incorporates a number of sophisticated technologies – many of them proprietary to
Lab.gruppen – that ensure the best possible performance and years of reliable operation. Familiarizing yourself with
these technologies will prove invaluable in setting up and optimizing your loudspeaker system.
5.2.1. Class D output stage and universal power supply with low current draw
All E Series ampliers employ a unique Class D output stage that is ideally matched to the rated power output. To
provide exibility, each channel offers sufcient voltage swing and current capacity to drive either constant voltage
(“70 V”) or low impedance (2/4/8 or 16 ohms). In order to have low thermal losses as well as the voltage swing
required to drive 70 V, the design is based on a permanently bridged output.