Lab Gruppen D 20:4L, D 10:4L Data Sheet

D 40:4L | D 20:4L | D 10:4L

Lab.gruppen D Series: The Integration Superpower

The Lab.gruppen D Series provides exceptional performance and
expanded fl exibility in audio amplifi cation for challenging systems
integration applications in stadia, arenas, convention centers and other
advanced or demanding installed sound installations.

Extending downwards in power and based on the proven, innovative
and green amplifi e r technologie s of th e fl agship D Series, these D Series
slimline models also include Rational Power Management (RPM™) –
a proprietary Lab.gruppen technology that rationalises power allocation
and potentially reduces amplifi er inventory. The Lake-variant D Series

Technical Data

D SERIES LAKE: High-Performance Installation Platform

models benefi t from the proven package of onboard Lake Processing
and Dante™ digital audio networking, and also off er integration
potential with many 3rd party matrix and proprietary DSP systems
via dedicated middleware. Equipment specifi cation, commissioning
(including confi guring RPM and other unique amplifi er technologies)
and on-going control and system monitoring are managed via the
innovative CAFÉ™ software, running on Mac or PC. D Series features
include redundant audio inputs as well as on board surveillance and
load monitoring to fulfi ll the requirements of mission critical voice
evacuation compliance.

D Series Slimline Features and Benefi ts

▸ Four-channel amplifi ers available in three power models

▸ D 40:4 - 4000 W of total output power (4 x 1000 W nominal)

▸ D 20:4 - 2000 W of total output power (4 x 500 W nominal)

▸ D 10:4 - 1000 W of total output power (4 x 250 W nominal)

▸ Channel your power - Rational Power Management (RPM)

▸ Tru e fl exibility in allocating power output across channels to

match requirements, enabling more effi cient use of amplifi er
inventory

▸ Any channel can be signifi cantly scaled up in power from its

average quarter of the total available power.

▸ Exceptional power density with 4 high power channels in a

slimline 1 rack unit form factor

Lake Processing Technologies

▸ Lake’s exclusive classic/linear-phase/FIR speaker processing

platform with four throughputs

▸ Group control with Raised Cosine™ MESA EQ™ asymmetric

fi lters

▸ LimiterMax™ peak and RMS limiters

▸ Extensive loudspeaker preset database (LoadLibrary™)

▸ Comprehensive clocking management system with low latency

sample rate conversion

▸ Dedicated on-board surveillance & load monitoring system

▸ Unique power platform

▸ Universal regulated switching power supply with internal energy

storage and best in class power factor correction

▸ Breaker emulation limiter with confi gurable breaker profi le and

current

▸ Effi cient IDEEA class D amplifi er modules with low impedance

or direct 70 and 100 V drive.

▸ CAFÉ (Confi guring Amplifi ers For the Environment) Software

incorporating ESP™ (Equipment Specifi cation Predictor) for
design, system and equipment planning, installation and
commissioning.

▸ Multiple and redundant inputs with programmable failover

▸ Four “Lake Class” analog inputs with Iso-Float™ ground

isolation

▸ Two AES3 digital inputs (4 audio channels)

▸ Eight dual-redundant Dante network audio inputs

▸ Comprehensive 3rd party protocol for integration potential with 3

party matrix systems via purpose-developed middleware

rd

▸ Full support for Dante Controller

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D Series: Technology Overview

The D Series from Lab.gruppen off ers an unprecedented
combination of sustained high output, impeccable sonic performance,
confi guration fl exibility, and real-world effi ciencies for reduced
installation and operating costs. D Series brings the world’s most
innovative, capable and proven amplifi er technology to virtually any
high specifi cation installation project, regardless of preferred DSP
platform or specifi c matrix components.

Proven Lab.gruppen Technologies

Reliability and durability remain the bedrock criteria for any installation
amplifi er, and in this regard the D Series rigorously maintains
Lab.gruppen’s industry-leading reputation. The amplifi er output stages
are the Lab.gruppen IntelliDrive Energy Effi cient Amplifi er (IDEEA). The
Class D output stage is highly effi cient, while the inherently bridged

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
specifi c 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 amplifi ers, it is often necessary to
“over-specify” amplifi ers to meet the maximum power demand
on one channel, leaving excess power capacity wasted on the
remaining channels. RPM reduces costly excess capacity by allowing
re-allocation of output power capacity among the four channels. RPM
can be confi gured so that any channel can be signifi cantly scaled up
from its average quarter of the total available power. With RPM in the
D Series, up to the specifi ed single channel power can be used for

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.

power-hungry low-frequency systems while the remaining output
power can be allocated as needed for the mid-frequency and high­frequency drivers, or for less demanding 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 specifi ed for the diff erent loads in several diff erent 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 specifi ed output power will be maintained regardless of demand of
on other channels. If a particular zone’s input is being driven beyond
the specifi ed 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.

SUBS

LOW FREQUENCY
DRIVERS

MID FREQUENCY
DRIVERS

HIGH FREQUENCY

Amplifier Power Required

SUB

D Series - Amp channels power adjusted to match the loudspeaker requirements

LOW

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DRIVERS

MID

HIGH

Frequency

CAFÉ and RPM for Green Credentials

D Series is confi gured and monitored using Lab.gruppen’s CAFÉ
(Confi guring Amplifi ers For the Environment) software suite. In
addition to providing comprehensive system surveillance and
confi guration of RPM and other amplifi er features such as ISVPL and
Breaker Emulation Limiter (BEL), CAFÉ also includes valuable help
to save the environment. In combination with the RPM confi guration
CAFÉ can accurately predict, based on the true SPL and speaker
requirements of the individual loads for the given project, estimations
of average mains current draw and generated heat in BTU. With
D Series’ innovative power supply technologies (true Power Factor

Correction and internal energy storage) the required mains draw
is already best in class in relation to burst power output, but in
combination with the BEL the mains draw can also be safeguarded
to the predicted level. The end result is precise mains management
and thermal control, which allows more accurate (rather than over­specifi ed) provision of mains distribution, cabling and cooling.
This technology suite not only saves on installation costs, it also
reduces lifetime running costs and minimizes environmental impact.
It also reduces demands on UPS systems in “mission critical” voice
evacuation systems in arenas and stadia.

Windows 10

CAFÉ and Equipment Specifi cation Predictor (ESP)

CAFÉ also features an innovative design aid – the Equipment
Specifi cation Predictor (ESP). ESP examines the system SPL and
speaker requirements for a given project and aids in transforming
that data into circuit and amplifi er channel requirements. On a system

Two AES3 di gital input s (4 audio chann els) 16 amp loc king IEC for ma ins supply

Analo g inputs wit h Iso-Fl oat

Four “L ake clas s” analog i nputs wi th Iso- Float
ground isolation

EtherC ON inputs

Two ethe rCON jac ks are pro vided for t he dual
redun dant cont rol and Da nte conne ctions

level, ESP supplies a recommendation for optimized placement of
channels into amplifi ers for the most cost eff ective solution. The
recommendation includes model and quantities of D Series required
with most rational use of amplifi ers, minimizing wasted headroom.

Speake r outputs

Deta chable te rminal bl ock conne ctors f or easy
inst all (up to 8 mm2 or 8.2 AW G cables )

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Lake Processing

D Series Lake versions provide extraordinary input fl exibility,
the legendary power of exclusive Lake processing algorithms,
comprehensive control and load monitoring via Lake Controller, and
seamless integration into Dante digital audio networks. In addition,
by employing third-party middleware, D Series Lake versions
can be integrated into on other widely used networked digital
matrix systems.

All three D Series Lake models incorporate four full-featured Lake
Processing modules, with four discrete channels of audio throughput
input to output. Audio signals are selectable from four channels
of analog (with Iso-fl oat ground isolation), four channels via AES3
digital inputs and eight dual redundant Dante networked digital
inputs. Input signals are individually selectable for each channel, with
programmable failover to to a lower prioritized input.

The full-featured, on-board Lake processor includes group control
with Raised Cosine MESA EQ asymmetric fi lters to match the
responses of many loudspeaker systems. LimiterMax peak and RMS
limiters set the industry standard for loudspeaker protection and
sonic transparency.

The included Lake Controller software provides a unifi ed interface
for control of Lake functions and for comprehensive monitoring of
both amplifi er status and connected loudspeaker loads. Optimized
for a wireless tablet PC, Lake Controller is easy and intuitive to
operate, with the “feel” of real-time analog faders and controls. Lake
Controller also features seamless integration with third party, real­time sound system measurement, optimization, and control software
packages. Users can measure spectrum and transfer function and
adjust system EQ at the same time, using the same user interface.

Front Panel: Lake Versions

The front panel provides controls for power STANDBY/ON and for
amplifi er channel mute as well as bidirectional select functionallity
between device and software. It also includes multi-color LED

Module Data stored in Module FIles (Speaker Presets)

Frame Data stored in System Files and Frame Presets

Attenuator

Phase Rev

INPUTS

Dante Receivers 1-8

AES 1-4

Analog 1-4

AES/Analog

pass through

to Dante

OUTPUTS

Dante 1-8

(no mutes)

Input

Routers

1-4

WITH

INPUT

MUTES

Input

Mixer A

Input

Mixer B

Input

Mixer C

Input

Mixer D

Lake Contour

Module A

Lake Contour

Module B

Lake Contour

Module C*

Lake Contour

Module D*

Custom RPM

Attenuator

Phase Rev

Custom RPM

Attenuator

Output Routing

Phase Rev

Custom RPM

Attenuator

Phase Rev

Custom RPM

System Block

The input section (inputs, input router and input mixer) allows for
mixing capabilities as well as redundant and prioritized inputs with
automatic switch-over in case of signal failure. Up to four Lake
Processing modules provide user EQ and loudspeaker processing,

indicators which display important status information for the
D Series Lake platform unit as well as for each individual output
channel.

Mute

Mute

Mute

Mute

ISVPL

Auto RPM

ISVPL

Auto RPM

ISVPL

Auto RPM

ISVPL

Auto RPM

Amp Gain LoadSmart LoadPilot AMP

Amp Gain LoadSmart LoadPilot AMP

Amp Gain LoadSmart LoadPilot AMP

Amp Gain LoadSmart LoadPilot AMP

including LimiterMax limiting. Each power output channel provides
individual channel processing, including ISVPL limiter, RPM and
load monitoring.

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Specifications

D 40:4L

2

W

D 20:4L

D 10:4L

800 W

1

W

1

1

W

7

5

1

1

8

1

1

1

7

5

1

2

500 W

5

W

5

W

5

W

W

5

W

5

W

2

W

W

1

W

1

W

1

W

W

5

W

1

1

W

W

W

175 W

8

700 W

1

p

p

30 Apk

1

1

pk

p

p

30 Apk

1

pk

p

p

30 Apk

65 Vpk

General

Processing / Network Lake / Dante Lake / Dante Lake / Dante
Number of amplifi er channels 4 4 4
Total burst power all channels (share among channels with RPM) 4000 W 2000 W 1000 W

Max. O utp ut Power ( all ch .’s drive n)

2 ohms 800 W 500 W 250 W

2.67 ohms 1000 W 500 W 250 W
4 ohms 1000 W 500 W 250 W
8 ohms 1000 W 500 W 250 W
16 ohms 700 W 425 W 250 W
Hi-Z 25 V 500 W 500 W 250 W
Hi-Z 70 V 1000 W 500 W 250 W
Hi-Z 100 V 1000 W 250 W 175 W

Max ou tput power s ingl e chan nel (al l mode ls)

2 ohms 850 W 850 W 850 W

2.67 ohms 1150 W 1150 W 1000 W
4 ohms 1750 W 1600 W 1000 W
8 ohms 1350 W 1100 W 1000 W
16 ohms 700 W 600 W 600 W
Hi-Z 25 V 500 W 500 W 500 W
Hi-Z 70 V 1450 W 1400 W 1000 W
Hi-Z 100 V 2000 W 1000 W 700 W

Amplifi er o utpu t modu les (all mode ls, al l channel s)

Peak output voltage 150 Vpk 142 Vpk 142 Vpk
Max output current 30 Apk 30 Apk 30 Apk

Rational Power Management (RPM)

Default voltage limitation (can be lifted with RPM confi guration) 145 Vpk 100 Vpk 65 Vpk
Protection features

Amplifi er platform

Inter Sample Voltage Peak Limiter (ISVPL) Confi gurable Peak voltage threshold and profi le
Amplifi er gain Digital confi gurable amplifi er gain 22 - 44 dB
Pilot tone generation and analysis Yes
Load impedance analysis Yes
Temperature control Temperature regulated fans (front-to-rear air fl ow) and show must go on limitation (ATL, PTL)

Audi o Perf orma nce (A mplifi e r platfor m with d igit al in put)

THD + N 20 Hz - 20 kHz for 1 W < 0.05 %
THD + N at 1 kHz and 1 dB below clipping < 0.04 %
Dynamic range > 112 dB
Channel separation (Crosstalk) at 1 kHz > 70 dB
Frequency response (1 W into 8 ohm, 20 Hz - 20 kHz) +/- 0.05 dB
Internal sample rate / Data path 96 kHz / 32 bit fl oating point
Product propagation delay AES 96 kHz / analog input 1.61 / 1.68 ms

Lake processing

Loudspeaker processing Up to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax™ - peak and RMS limiters
System tuning Group control with Raised Cosine™ MESA EQ™ asymmetric fi lters
Input redundancy / Matrix Automatic 4 level input redundancy / 4 input mixers
System integration Comprehensive 3rd par ty protocol over UDP Ethernet

Dante Audio N etwo rk

Dante I/O 8 x 8
Network topology / redundancy Flexible topology / Supports Dual redundant networks
Sample rates / transpor t 48, 96 kHz / Uni + Multicast
Network latency 0.25, 0.5, 1.0, 2.0, 5.0 ms

Analog inputs

Inputs 4 high quality inputs with Iso-Float™ ground isolation
Maximum input / digital reference + 26 dBu / +21 dBu
Sampling rate / resolution 96 kHz / 24 bit
Input impedance balanced / unbalanced 20 / 10 kOhm
THD + N (typical at 1 kHz unweighted) 0.00022 %
THD + N (typical at 20 Hz and 20 kHz unweighted) 0.00033 %

AES Inputs

Inputs 4 AES inputs
Supported sample rates / resolution 44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bit
Sample rate conversion THD + N 20 Hz - 20 kHz unweighted 0.00003 %

1)

1)

D 40:4L D 20:4L D 10:4L

4000 W

000

000 W

000

00 W

00 W

000 W

000 W

50 W

150 W

750 W

350 W

00 W

00 W

450 W

000 W

50 Vpk

Share “Total burst power” of the product freely among channels. Any channel can scale up to the “single
channel max power”

45 Vpk

Current Average Limiter (CAL), Very High Frequency Protection (VHF ), Direct Current Protection (DC),
Short Circuit Protection, Current-Clip Limiter, Voltage Clip Limiter, Temperature protection

000

00

00

00

425

00

00

50

850

150

600

100

600

00

400 W

000

42 V

00 V

1000 W

250 W

250

250 W

250

250 W

250 W

250 W

50 W

1000 W

1000 W

1000 W

600 W

500 W

1000 W

142 Vpk

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Specifications

g

15 A Yes

p (p y

A

N

)

A

N

8

)

7.9 kg (17.3 lbs)

)

D 10:4L

D 40:4L

D 20:4L

Back panel i nter face

Analog inputs 4 x Terminal block connectors analog input with +, - and ground
AES inputs 4 x Terminal block connectors analog input with +, - and ground

Output connectors
Ethernet ports 2 x EtherCon RJ45 Lake Controller, Dante controller and/or DLM (3rd part y protocol)

Detachable mains cord Detachable locking 3-pin IEC rated at 250 V / 16 A

Front p anel u ser in ter face

System status indication
Channel status indication 3 x tri-color LED per channel. Status indication separated for channel LOAD, AMP, SIGNAL status
Mute Per channel touch button for MUTE control and tri-color LED for indication
Power Touch button for ON/STANDBY control and tri-color LED for power state indication
Select Touch button and LED for bi-directional device sof tware select functionality

Mains Power

Nominal voltage 100 - 240 V AC 50 - 60 Hz
Operating voltage 70 - 265 V AC 45 - 66 Hz
Mains wall plug Selectable on order

Power supply features

Soft start / Inrush power Yes
Power factor correction > 0.98 for mains power > 300 W
Regulated switch mode power supply (R.SMPS) Yes
Breaker Emulation Limiter (BEL)
BEL max current threshold 15 A 7 A 7 A
Power Average Limiter (PAL) Yes
Under Voltage Limiter (UVL) Yes
Mains undervoltage and overvoltage protection and
mains glitch tolerance

Adaptive Rail Control

Dimensions

Rack rail to rear panel W: 483 mm (19”), H: 44 mm (1 U), D: 425 mm (16.7”)
Overall depth front-rear support D: 463 mm

Weight
Finish

Approvals

D 40:4L D 20:4L D 10:4L

4 x 2 pole Terminal block connectors rated at 1000 V / 41 A (exceeding amplifi er capacity) Can take up
to 8 mm2 (8.2 AWG) cables

3 x tri-color LED. FRAME, TEMP, PSU for device status indication

CEE 7/7 “Schuko” 230 V / 16 A,
NEMA 5-15 125 V / 15 A,
BS1363-A 250 V / 13 A,
IA16A3 250 V / 16 A,
AU/NZ 250 V / 10 A,
JP 125 V / 15 A,
CPCS-CCC 250 V / 10 A

Confi gurable mains current threshold and breaker profi le (profi le only D 40)

Yes

Optional green mode for improved effi ciency at low output levels

8.3 kg (18.3 lbs) 7.9 kg (17.3 lbs) 7.8 kg (17.1 lbs)

.3 kg (18.3 lb s

Black painted steel chassis with grey painted steel front with detachable grille

CE, ETL (ANSI/UL, CSA), PSE, RCM, BIS, CCC

7

No No

o

7

o

7.8 kg (17.1 lb s

Note 1): Lab.gruppen burst power (1 kHz, 25 ms burst power @ 150 BPM, 12 dB Crest factor)

All specifications are subject to change without notice.

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Item no. TDS-DSERIESLAKE2_V2 - 22.11.2016