LAB GRUPPEN PLM 12K44 SP_002 12,000W Amplifier with 4 Flexible Output-Channels on SpeakON Connectors, Lake Digital Signal Processing and Digital Audio Networking for Touring Applications (PLM 12K44 SP_002)

Vendor: Lab Gruppen
LAB GRUPPEN PLM 12K44 SP_002 12,000W Amplifier with 4 Flexible Output-Channels on SpeakON Connectors, Lake Digital Signal Processing and Digital Audio Networking for Touring Applications (PLM 12K44 SP_002) The PLM 12K44 combines a...

LAB GRUPPEN PLM 12K44 SP_002 12,000W Amplifier with 4 Flexible Output-Channels on SpeakON Connectors, Lake Digital Signal Processing and Digital Audio Networking for Touring Applications (PLM 12K44 SP_002)

The PLM 12K44 combines a 4-in, 4-out configuration with industry-standard Dante Networking, setting the benchmark for powered loudspeaker management systems.

The PLM 12K44 represents the evolution of Lab Gruppen's esteemed and road-tested touring legacy, continuing the lineage established by the iconic PLM series. This new iteration introduces a powerful addition: the capability to intelligently allocate power among channels to optimize performance. Encased in an expanded 4-in, 4-out configuration and bolstered by double the processing power through the latest version 6.3 Lake Controller release and industry-standard Dante® networking, the PLM 12K44 sets a new standard for Powered Loudspeaker Management Systems. This system seamlessly merges four channels of robust amplification with unparalleled signal processing and audio management capabilities. At its core, the concept revolves around the complete integration of all facets—networking, audio I/O, signal processing, amplifiers, power supply, and mains supply. This integration empowers users with comprehensive control and monitoring of the entire platform, delivering distinctive operational advantages.

Rational Power Management (RPM)

The PLM 12K44 introduces Rational Power Management (RPM), an exclusive technology by Lab Gruppen that redefines the paradigm of power allocation within amplifier channels, offering designers and systems technicians unprecedented flexibility to optimize performance under specific load conditions. RPM enables a truly adaptable power distribution across the four output channels, allowing customization for each channel to cater to the connected load requirements. Any unutilized power in a channel can be allocated to other channels, ensuring an efficient use of available resources. This innovation averts amplifier over-specification or the need to bridge adjacent channels to meet the demands of a power-hungry load, which could otherwise lead to a reduction in channel count. RPM technology also enables cost savings, minimizing rack space, reducing equipment expenses, and enhancing long-term energy efficiency—all achieved without compromising the sonic performance. Rational Power Management includes protective features that secure the defined power output of one or more designated channels. The CAFÉ software, it assesses the power demand for various loads via different approaches. RPM then evaluates this demand concerning channel and device constraints, offering guidance to the system designer on the most effective power delivery for the PA. This strategic approach results in tangible savings, both immediate and long-term. In many scenarios, fewer or lower-cost amplifiers can fulfill power requirements adequately. Additionally, it optimizes mains management, preventing over-specification of mains distribution, cooling, and UPS (if necessary). Moreover, enhanced efficiency in larger systems minimizes current consumption, reducing operational costs—a substantial environmental benefit for the system owner.

The Power of Lake Processing

The PLM 12K44 features the legendary power of exclusive Lake Processing algorithms, incorporating four full-featured Lake modules with four discrete channels of audio throughput input to output. Audio signals are selectable from four channels of analog (with Iso-Float 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 a lower prioritized input. The full-featured, onboard Lake Processor includes group control with Raised Cosine MESA EQ asymmetric filters to match the responses of any loudspeaker system. LimiterMax peak and RMS limiters set the industry standard for loudspeaker protection and sonic transparency. The included Lake Controller software provides a unified interface for the control of Lake functions and comprehensive monitoring of both amplifier 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, real-time sound system measurement, optimization, and control software packages. Users can measure spectrum and transfer functions and adjust system EQ at the same time, using the same user interface. Lake Processing offers classical crossovers (selectable up to 48 dB per octave) as well as linear-phase crossovers capable of slopes exceeding 180 dB per octave for greater control to limit lobing and off-axis cancellation.

CAFÉ for Green Credentials

CAFÉ (Configuring Amplifiers For the Environment) is a software suite that allows the PLM 12K44 to be easily configured and monitored in the most efficient manner possible. In addition to providing comprehensive system surveillance and configuration of RPM and other amplifier features such as ISVPL and Breaker Emulation Limiter (BEL), CAFÉ also includes valuable help to save the environment. In combination with the RPM configuration CAFÉ can accurately predict estimations of average mains current draw and generated heat, and utilizing the PLM+ Series’ innovative power supply technologies in combination with BEL the mains draw can be safeguarded to a predicted level. The end result is precise mains management and thermal control, which allows more accurate (rather than over-specified) provision of mains distribution, cabling and cooling. This technology suite reduces lifetime running costs and minimizes environmental impact. It also reduces demands on UPS systems.

Allocate Power Where It Is Needed

RPM Provides ultimate flexibility of power output allocation across channels to match specific load requirements, enabling more efficient use of amplifier inventory.

More is More: Power, Performance, and Processing

PLM+ offers unprecedented levels of refined performance, double the processing power, and even better overall efficiency – proven, tested, and trusted.

Cafe With ESP: Configuration, Control, and Monitoring

Lab Gruppen’s dedicated integrated software provides comprehensive system surveillance, reducing running costs and minimizing environmental impact.


  • 12,000 Watt amplifier with 4 flexible output channels and up to 5,900 Watts channel output for touring applications

  • Lake digital signal processing for unparalleled loudspeaker management and system control

  • Integrated 8x8 channels of dual redundant Dante digital audio networking with AES67 support

  • 4 x 3,000 Watts into 2 Ohms, 4 x 3,000 Watts into 2.67 Ohms, 4 x 3,000 Watts into 4 Ohms, 4 x 1,900 Watts into 8 Ohms, 4 x 950 Watts into 16 Ohms, 4 x 3,000 Watts into Hi-Z 70 V, 4 x 3,000 Watts into Hi-Z 100 V

  • Proven and reliable Class-TD output stage with proprietary Intercooler high-efficiency cooling system

  • Rational Power Management (RPM) provides total flexibility to allocate available power across all 4 output channels

  • Best-in-class Power Factor Correction (PFC) with Current Draw Modelling reduces running costs and minimizes environmental impact

  • Under-Voltage Limiting (UVL) for continued operation during severe mains supply voltage drops

  • Dedicated on-board surveillance and load monitoring for complete peace of mind

  • Redundant audio inputs and on-board system surveillance for full system security

  • Backlit, white-on-black front panel display and menu navigation buttons

  • 100 user presets for simple and efficient system configuration and set-up

  • 3 front-to-rear airflow fans with temperature control for optimal speed and reduced noise

  • 4 "Lake Class" analog input channels with Iso-Float ground isolation

  • 4 input channels of AES/EBU (AES3) digital audio supporting all standard sample rates up to 192 kHz with 24-bit resolution

  • 2 Neutrik etherCON RJ-45 ports provide dual redundant Dante interfaces and remote configuration via Lake Controller and Dante Controller software

  • Balanced analog and AES/EBU audio inputs on Neutrik XLR connectors

  • 1 NLT8 and 2 NLT4 Neutrik speakON output connectors

  • Detachable Neutrik powerCON cable rated at 250 V / 32 A

  • Removable dust filter grilles for increased air circulation

Processing / Network

Lake / Dante

Number of amplifier channels


Total burst power all channels (share among channels with RPM)

12000 W

Max output power (all channels driven)1
2 ohms

3000 W

2.67 ohms

3000 W

4 ohms

3000 W

8 ohms

1900 W

16 ohms

950 W

Hi-Z 70 V

3000 W

Hi-Z 100 V

3000 W

Max output power single channel1
2 ohms

4400 W

2.67 ohms

5900 W

4 ohms

4600 W

8 ohms

2300 W

16 ohms

1150 W

Hi-Z 70 V

3300 W

Hi-Z 100 V

4700 W

Amplifier output modules (all models, all channels)
Peak output voltage

194 V

Max. output current

67 A

Rational Power Management (RPM)

Regardless of model, any channel has potential to deliver the max single channel output power

Default voltage limitation (can be lifted with RPM configuration)

175 V

Protection features

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

Audio Performance (Amplifier platform with digital input)
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

> 114 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

48 / 96 kHz / 32 bit floating 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 EG™ asymmetric filters

Input redundancy / Matrix

Automatic 4 level input redundancy / 4 input mixers

System integration

Comprehensive 3rd party protocol over UDP Ethernet

Measurement & Analysis
Pilot tone generation and analysis


Load impedance analysis


Real Time Analyzer (RTA), 3rd party integration


Dante Audio Network
Dante I/O

8 x 8

Network topology / redundancy

Flexible topology / Supports daisy-chained and Dual redundant networks

Sample Rates / Transport

48, 96 kHz / Uni + Multicast

Network latency

0.25, 0.5, 1.0, 2.0, 5.0 ms

Device presets
Local memory locations for the settings of the product


AES Inputs

4 AES inputs

Supported sample rates / resolution

44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits

Sample rate conversion THD+N 20 Hz - 20 kHz unweighted


Analog 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)


THD+N (typical at 20 Hz and 20 kHz unweighted)


Adjustable Inter-Sample Voltage Peak Limiter (ISVPL)

17.8 - 194 V, step size 0.1 V

Current Peak Limiter < 300 ms

67 A peak

Current Average Limiter (CAL) > 300 ms

33 Arms

MaxRMS (rms voltage limiter)


MaxPeak (peak voltage limiter)


Amplifier gain

22 - 44 dB, step size 0.1 dB

Output attenuator

-Inf to 0 dB, step size 0.25 dB

Back panel Interface
Analog, 2-channel I/O (input + link)

4 x 3-pin XLR, electronically balanced

AES / EBU / I/O (input + link)

2 x 3-pin XLR

Output connectors

Neutrik speakON (1 x NLT8, 2 x NLT4) or 4 Binding Posts (pairs)

Auto 10/100, Auto Uplink

2 x RJ45 etherCON

Control and monitoring interface

Via Ethernet for Lake Controller software, or DLM (the 3rd party protocol)

Detachable mains cord

Neutrik PowerCon rated at 250V/32A


Three fans, front-rear airflow, temperature controlled speed

Front-panel user interface

2.5 inch, black / white, daylight readable LCD

Fault/Warning/Limit/Clip indicators

RGB LEDs and detailed fault description on display

Mute and soft function buttons

8 provided

Standby Power button


Mute Enable button

Enables muting of outputs and inputs via soft-button keypad

Meter button

Toggles through meter views

Menu button

Provides a menu driven interface for full function front panel control

Rotary Encoder


Exit Button

Provides a “back” function

Mains Power
Nominal voltage

100 - 240 Volt AC 45 - 66 Hz

Operating voltage

70-265 V AC

Mains wall plug

NEMA L5-30 "Twist lock" 125 V / 30 A, and CEE 7/7 "Schuko" 230 V / 16 A

Power supply features
Soft start / Inrush power

Yes/ Max 8 Ampere

Power Factor Correction (PFC)


Regulated switch mode power supply (R.SMPS)


Breaker Emulation Limiter (BEL)

Configurable current threshold and breaker profile

BEL max current threshold

25 A

Power Average Limiter (PAL)


Under Voltage Limiter (UVL)


Mains undervoltage and overvoltage protection and mains glitch tolerance


Rack rail to rear panel

W: 483 mm (19"), H: 88 mm (2 U), D: 424 mm (16")

Overall depth front-rear support

D: 498 mm (19.6")


16.5 kg (36 lbs)


Black painted steel chassis with black painted steel / aluminum front