Data Sheet

D Series: Technology Overview
The D Series from Lab.gruppen off ers an unprecedented
combination of sustained high output, impeccable sonic performance,
configuration flexibility, and real-world efficiencies for reduced
installation and operating costs. D Series brings the world’s most
innovative, capable and proven amplifier technology to virtually any
high specification installation project, regardless of preferred DSP
platform or specific matrix components.
Proven Lab.gruppen Technologies
Reliability and durability remain the bedrock criteria for any installation
amplifier, and in this regard the D Series rigorously maintains
Lab.gruppen’s industry-leading reputation. The amplifier output stages
are the Lab.gruppen IntelliDrive Energy Effi cient Amplifier (IDEEA). The
Class D output stage is highly effi cient, while the inherently bridged
topology allows a multitude of the rated power output per channel
for RPM and stable inherent hi-impedance operation. D Series also
off ers a full suite of protection features, including thermal “show-
must-go-on” limiting, short circuit protection, excessive average
current limiting, sustained VHF (very high frequencies) protection,
DC protection and voltage- and current-clip limiting. None of the
limiters introduce slow, long term gain changes that can risk altering
the balance of a tuned system. A Breaker Emulation Limiter (BEL)
prevents power interruption while Under-Voltage Limiting (UVL) allows
continued operation despite severe voltage drops (not available on
D10 and D20).
Channel your power - Rational Power Management (RPM)
At the core of the D Series platform is Rational Power Management
(RPM), a proprietary Lab.gruppen technology that gives system
designers and integrators unprecedented freedom to allocate the
output power available on each channel for optimum performance with
sp
ecific load conditions. RPM technology also enables the integrator to
minimize initial equipment costs, reduce rack space requirement and
improve long-term energy effi ciency – all without compromising sonic
performance.
With conventional installation amplifiers, it is often necessary to
“over-specify” amplifiers to meet the maximum power demand
on one channel, leaving excess power capacity wasted on the
remaining channels. RPM reduces costly excess capacity by allowin
g
re-allocation of output power capacity among the four channels. RPM
can be configured so that any channel can be significantly scaled up
from its average quarter of the total available power. With RPM in the
D Series, up to the specified single channel power can be used for
power-hungry low-frequency systems while the remaining output
power can be allocated as needed for the mid-frequency and high-
frequency drivers, or for less demandin
g zones within a typical large
project – such as concessions, concourses, VIP suites and function
rooms within a sports arena or stadium.
From within the CAFÉ software, RPM allows the desired power demand
to be specified for the different loads in several different ways. RPM
then analyses the desired power in relation to load impedance as well
as diff erent channel and device constraints. If all desired power levels
are within constraints, RPM safeguards the balance and assures that
the specified output power will be maintained regardless of demand of
on other channels. If a particular zone’s input is being driven beyond
the specified power levels, RPM aids in limiting that zone to make sure
the power is available for other zones. If the desired total power is in
excess of what the power model can deliver, RPM can facilitate that the
limitation is shared equally among the channels.
WWW . L A B G R U PPE N . C O M
SUB
LOW
MID
HIGH
D Series - Amp channels power adjusted to match the loudspeaker requirements
SUBS
LOW FREQUENCY
DRIVERS
MID FREQUENCY
DRIVERS
HIGH FREQUENCY
DRIVERS
Amplifier Power Required
Frequency