Lab.gruppen E 8:2 - Manual (Page 6)

5. Introduction
6
E SERIES Operation Manual rev 2.0.0
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 Efficient Amplifier. 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 amplifiers. Please read through this manual in its entirety to become fully acquainted
with configuration options and protection circuitry.
This brief summary, in conjunction with Installation (Section 7), contains the basic information needed to safely
install the amplifier 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 amplifier modes or loudspeaker system configuration.
Lab.gruppen E Series power amplifiers are designed and built specifically for the unique demands of permanent
installation applications. By packing two channels of efficient reconfigurable power amplification into a 1U chassis,
the E Series achieves a high power and channel density. The benefits include reduced rack space requirements
and minimal heat build-up. The flexible output stages enable each amplifier 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 amplifier 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 amplifier models. Any references to “E Series” in
this manual refer to all models in the range.
5.2. Features
Your new E Series amplifier 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 amplifiers employ a unique Class D output stage that is ideally matched to the rated power output. To
provide flexibility, each channel offers sufficient 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.