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Our Dedicated Install and Touring Amplifier Platforms Incorporate Radical New Thinking to Deliver Real-World Benefits in Performance, economy and User Experience.

With a 35 year history of innovation, the Lab Gruppen brand has grown out of the fundamental principles of the company's founders—an amplifier company built on pioneering engineering design with the aim of delivering better results, for users and audiences alike, not profiteering or cutting corners.

Over the past four decades, Lab Gruppen has repeatedly redefined the professional amplification market with new innovations and technological firsts.

We continue to set new industry benchmarks for sustained high output, impeccable sonic performance, configuration flexibility, and lower overall installation and real-world running costs.

Put simply: At their core, Lab Gruppen & Lake products are defined by cutting-edge technological innovation. With our proven amplifier and power supply technologies, our dedicated install and touring amp platforms incorporate radical new thinking to deliver real-world benefits in performance, economy and user experience.

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Rational Power Management

RPM Allows Truly Flexible Power Allocation Across All Channels to Ensure the Most Efficient and Rational Use of Total Amplifier Inventory.

Lab Gruppen’s D Series provides consultants and integrators with unprecedented flexibility for specifying amplifier output channels to meet the varying load conditions within a single complex project. For the first time, Rational Power Management (RPM™) provides true flexibility in allocating available power across the four output channels.

Each channel may be tailored to meet the requirements of the connected load, and any power not used for that channel may be allocated for use on other channels. In addition, regardless of model, RPM’s LOAD-MAX feature ensures that one or more channels can supply up to 5000 W of output (1 channel on D 80:4, two on D 120:4, all four on D 200:4). This avoids amplifier “over-specification” on all channels (inefficient use of total amplifier inventory) or bridging of adjacent channels (thus reducing channel count) in order to meet minimum demands on one power-hungry load.

RPM also incorporates LOAD-GUARD, a unique feature that safeguards the defined power output of one or more specified channels. Defined in the CAFE software, LOAD-GUARD assures that the full output power will be maintained regardless of demand of on other channels, with the remaining channels responding to a best-case scenario to deliver defined power output while maintaining rail voltage and power supply optimization.

Rational Power Management results in real-world savings, both immediate and long-term. In many cases, fewer amplifiers – or lower cost models – may be specified while still fulfilling all power requirements. It also allows better mains management, avoiding over-specification of costly infrastructure components including mains distribution, cooling, and UPS (where required, such as mission-critical Voice Alarm/Emergency Evac systems). Finally, the overall gains in efficiency in larger systems will minimize current consumption and reduce operation costs – a “green bonus” for the system owner.

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ISVPL (Inter-Sample Voltage Peak Limiter)

ISVPL Precisely Tailors Each Output for Any Type of Load. No Matter What the Loudspeaker Cabinet Type or the Arrangement of Transducers.

A digitally implemented version of Lab Gruppen's proprietary Voltage Peak Limiter (VPL). Known as the ISVPL™, this is a digitally implemented, zero overshoot, inter sample peak limiter. Working in tandem with the LoadLibrary™, ISVPL precisely tailors each output for any type of load.

No matter what the loudspeaker cabinet type or the arrangement of transducers – from a single massive 2-ohm subwoofer to a series of 16-ohm mid- or high-frequency drivers – ISVPL will ensure the correct calibrated output. Working in concert, the digitally enabled input gain and ISVPL optimize each channel for maximum headroom regardless of input signal dynamics or load impedances.

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BEL (Breaker Emulation Limiter)

To Assure Uninterrupted Service When Pushed to Extremes, the Breaker Emulation Limiter (BEL) Algorithm Prevents Tripping of Mains Breakers and Enables Defined Power Requirements.

To assure uninterrupted service when pushed to extremes, both PLM Series and D Series employ the proprietary Breaker Emulation Limiter (BEL™) algorithm (to prevent tripping of mains breakers) along with advanced peak limiting circuits that keep output devices inside operating tolerances and below the thermal protection threshold.

With the BEL these amplifiers can be tailored to the available mains distribution without risking a tripped breaker.

The BEL can be configured with respect to both available breaker current and characteristics.

Under-Voltage Limiting (UVL™)

When Mains Voltage Sags Under Heavy Load and If Long Mains Cables are Used, the UVL Reduces the Output Power Before the Mains Voltage Becomes Critical for Operation.

For low mains voltage applications the all new Under-Voltage Limiting allows the amplifier to stay on even in extreme conditions. When mains voltages sag under heavy load and if long mains cables are used, the UVL reduces the output power before the mains voltage becomes critical for operation.

In combination with BEL, UVL allows for high power without tripping breakers regardless of what the mains voltage is. The new power supply design allows bursts to last longer without sagging rails

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True PFC (Power Factor Correction)

Unique Power Factor Correction (PFC) Utilizing Lab Gruppen's Mains Current Draw Modeling Algorithm (CDM™)

Unique Power Factor Correction (PFC) utilizing Lab Gruppen’s Mains Current Draw Modeling Algorithm (CDM™). Power factor >0.98 (for any significant power).

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Class TD Output Stage

Delivering the High Efficiency of a Class D Design With the Sonic Purity of a Class B Design Amplifier.

The foundation of Lab Gruppen’s prowess in power amplification, Class TD is a breakthrough design that occupied Lab Gruppen’s co-founder Kenneth Andersson for nearly two years. Class TD combines the high efficiency of a digital Class D with the sonic purity of classic Class B designs.

The power supply rails precisely track the audio signal at all times, providing the required voltage plus additional headroom. This process is highly efficient, with only a tiny portion of the supplied voltage emitted as heat in the output stage.

The audio path itself remains entirely in the analog domain. And because the audio path remains outside the switching portion of the circuit, the signal is free from any filtering ripple effects.

Class TD is bridgeable, highly reliable, and maintains a flat response with complex loads as low as 2 ohms nominal. Also, it does not interfere with RF equipment such as wireless (radio) microphones. Though treated separately here, R.SMPS and Class TD were conceived and engineered as an integral design within the amplifier platform. Working together, this new generation of proprietary circuits produces more power from a smaller package while at the same time maintaining Lab Gruppen’s peerless reputation for sonic excellence. The highs stay crisp and transparent. The mids are defined, warm and natural. And the tight low end delivers breathtaking visceral impact.

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INTERCOOLER® Cooling System

Eliminates “Heat Island Effect” and Ensures All Output Devices Are Cooled Equally at Same Rate – Delivering Improved and Sustained Performance.

The compact and ultra-efficient Intercooler uses thousands of tiny cooper cooling fins to increase exposure of the heat sink to the cooling airflow. Twin variable-speed fans respond to temperature sensors, forcing air over the Intercooler fins in a front-to-rear flow. All output devices are mounted transverse to the airflow, so the cooling effect is uniform. There are no “end of tunnel” output transistors subject to greater warming and, consequently, possible premature failure.

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Lake Processing

The Robust Power Platform of D Series and PLM Series Works Hand-In-Glove with Dual Integrated Lake Processing Modules with Features Such as Raised Cosine Equalization, Limiter Max, Peak and RMS Limiters, and ISO-Float Ground Isolation.

LM 26 and PLM Series devices contain two full-featured Lake Processor modules, each offering precise settings for gain, delay, crossover slope, equalization, and limiting. Exclusive Lake Processing algorithms are included for Raised Cosine Equalization, and linear phase. In addition, Lake Processing also incorporates Iso-Float™ ground isolation, a cost-effective and audibly superior alternative to isolation transformers.

Mesa EQ

Mesa EQ gives sound engineers a faster, more effective optimization tool—one that can truly match the asymmetrical responses of loudspeakers.

Ideal Graphic EQ

Ideal Graphic EQ is not implemented in the traditional manner, but instead uses Raised Cosine Filters that provide better selectivity than conventional filters. Ideal Graphic EQ filters sum to flat, thus providing a true response equalizer. This results in controls that provide exactly what is expected by the end user.

Raised Cosine Equalization

Raised Cosine Equalization is the foundation underlying Ideal Graphic EQ™ and Lake Mesa EQ™, the two revolutionary EQ interfaces provided by the Lake Processor.

The graphic above shows boost shapes typical of raised cosine (blue) and conventional (red) equalization. Note the increased selectivity of the raised cosine shape.

The development of the Lake Mesa EQ was a significant advance in EQ technology. While other processors provide standard symmetrical boost and cut functions, the Mesa EQ offers asymmetric filtering, with the ability to separate the sides of a parametric section, change center frequencies, and independently adjust slopes.

The Mesa EQ gives sound engineers a faster, more effective optimization tool—one that can truly match the asymmetrical responses of loudspeakers.

Linear Phase Crossovers

Linear phase crossovers are another feature separating Lake Processing technology from ordinary processors. Linear phase crossovers can match traditional crossover slopes, such as 24 dB per octave and 48 dB per octave, when desired. But they are also capable of transition slopes exceeding 180 dB per octave.

These slopes offer dramatic benefits when applied to various types of loudspeaker arrays. Off-axis lobing and cancellation between loudspeakers are dramatically reduced. Greater control over slopes means that different speaker cabinet types can be more easily mixed and matched. Also, a loudspeaker’s impulse response is significantly improved, providing a time-coherent wavefront.

Additionally, improvements of up to 3 dB or more in acoustic output power may be expected in some frequency ranges.

LimiterMax™ & Iso-Float™

– LimiterMax Loudspeaker Protection

LimiterMax is a significant advance in limiter technologies, combining an exclusive true-RMS limiter, an advanced peak limiter capable of instantaneous attack time (adjustable by the user), and additional sophisticated signal processing.

Iso-Float Ground Isolation: A Better Way to Avoid Ground Loops

Iso-Float technology combines the benefits of transformer-coupled isolation with the advantages of clean, direct-coupled inputs.

In the Lake processor input section, the audio converters are galvanically isolated, and not connected to the main ground. High-speed transformers and opto-isolators create a barrier between the processor and possible grounding aberrations from the outside electrical environment.

Additionally, you can change the grounding of any input or output remotely through the Lake Controller software interface.

While isolation transformers are typically an expensive option for many processors, Iso-Float is standard in the LM 26 and PLM Series units.

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Offering Unique Integration Potential with Implementations of Both Dante and AVB Networked Digital Audio.

Lab Gruppen has long been at the forefront of networked amplification, typified by the fact that we were one of the first manufacturers to license Audinate's Dante digital audio networking protocol – first implemented on our award-winning PLM Series in 2007. Both PLM Series and Lake-variant D Series products are controllable via the Lake Controller software application, and all are fully compatible with other compatible Lake devices such as LM Series processors and Yamaha digital mixing desks utilizing the MY8-Lake card.

Dante assignment and routing is integrated into the Controller making it all you need for the system’s Digital Audio Networking management. With the rapid proliferation of Dante devices in recent years, Dante equipped Lab Gruppen amplifiers can easily integrate into any eco-system – accepting digital audio transport from any number of matrixes, mixers and compatible DSP platforms.

Now, there is virtually limitless integration potential with custom development of middleware enabling D Series or PLM Series amplifiers to be network controlled from a wide range of leading 3rd Party matrix and proprietary system manufacturers. The introduction of D Series also heralds a unique and unprecedented case of integration of Tesira DSP from Biamp Systems and AVB network capability as standard. This opens up even greater potential for Lab Gruppen amplifier technology to integrate into virtually any system design. No other manufacturer offers the same high degree of networked audio and control integration potential.

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System Integrity Monitoring

Our Flagship D Series and PLM Series Platforms Benefit From Class-Leading System Integrity Monitoring Capabilities.


A LoadPilot function – facilitating the generation and real-time monitoring of an inaudible test signal within the PLM Series and D Series (Lake-variant models only) - is designed to support mission-critical PA/VA installations that require 24/7 monitoring of the connected loudspeakers, typically with fault detection within 45s.

This means that any fault within a large scale system can be immediately notified, located and rectified. This implementation ensures that both D Series and PLM Series meets the most stringent system requirements for large-scale mission-critical PA/VA applications.


LoadSmart is a comprehensive system testing tool that can quickly and accurately isolate problems such as miss-wired arrays, open or damaged voice coils, or developing problems such as rubbing voice coils that may lead to failure.

The LoadSmart verification test takes seconds, and the test signal cannot damage connected loudspeakers. The test can be run before the system is used to verify readiness, and then again after a performance when the audience is not present. Problems that may have developed during use can be isolated to facilitate preventive maintenance.


LoadLibrary is a unique database that provides precise descriptions of loudspeaker characteristics under controlled conditions of applied signal and ambient temperature. LoadLibrary data is created by loudspeaker manufacturers, or in association with major users, using carefully defined Lab Gruppen test procedures. LoadLibrary data is specific for each discrete component of the connected load: a single loudspeaker cabinet: or the discrete drivers(s) as internally connected in two-, three-, or four-way systems.

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Regulated Switch Mode Power Supply

Lab Gruppen pioneered the use of switch mode power supplies in power amplifiers, and the latest generation of this technology plays a key role in enabling the unrivaled potential and capabilities of the D Series.

Precise regulation maintains constant voltage on the internal rails, ensuring full output power and undistorted sound even when the mains voltage drops as much as 20% below nominal. The advanced D Series power supply also incorporates an enhanced ferrite power transformer core which, compared to its iron core counterparts, dramatically reduces weight and contributes to overall efficiency.

The universal (100 – 240 V) Regulated Switch Mode Power Supply (R.SMPS) found in all D Series models provides uninterrupted power in any installation across the globe, without fail.

Auto Load Sense (ALS)

Detecting Impedance and Self Configuring for Optimal Performance.

Auto Load Sense technology detects the impedance load on each channel and self-configures for optimal performance, allowing it to deliver maximum power output on all loads from 2 – 8 ohms.

IntelliDrive Energy Efficient Amplifier

Lab Gruppen's IDEEA Architecture Facilitates Energy Star 3.0 Compliance by Combining Net Operating Efficiency of Greater Than 80%

IDEEA (IntelliDrive Energy Efficient Amplifier) technology is based around a patented Class D output stage producing high power levels with very low distortion while drawing minimal mains current. Lab Gruppen's IDEEA architecture facilitates Energy Star 3.0 compliance by combining net operating efficiency of greater than 80% with an auto-power-down feature. After 20 minutes with no input signal present, the amplifier automatically switches to standby mode – reducing power consumption to less than 1 W – and switches back on when an input signal returns. GPIO facilities enable third-party systems to remotely control and monitor power state via contact closure.

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Automatic Dynamic Loudness Contouring

Based on Industry Leading Technology from TC Electronic, ADLC Ensures a “Fuller” and More Comfortable Listening Experience.

Automatic Dynamic Loudness Contouring (ADLC) technology ensures a “fuller” and comfortable listening experience – especially at low perceived levels. Based on industry leading technology from TC Electronic, ADLC ensures that amplifiers make the best of what comes into the system regardless of output gain (or “volume”).

At the limits of a loudspeaker’s SPL capability, the amplifier extends its useable range, keeping distortion at bay.

This dynamic processing automatically “eases off” at higher SPL so that the system maintains a consistent full-bandwidth sound with full impact at all listening levels.

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IntelliDrive Controller

Intuitive Software Control for a Powerful DSP

IntelliDrive Controller allows powerful user control over just about every aspect of DSP performance on each device on the network through a simple GUI. Available on PC, Mac and dedicated iPad app, and designed with touch-screen in mind, IntelliDrive Controller gives you the edge when it comes to system tuning.

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CAFÉ Software

CAFE with ESP: Integrated Software for Fast System Configuration and Surveillance

CAFÉ (Configuring Amplifiers For the Environment) is a dedicated software application for Windows and OSX that allows our amplifiers to be easily configured and monitored.

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, 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 our amplifiers' innovative power supply technologies (true Power Factor Correction utilizing Current Draw Modeling) 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 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.

CAFÉ also features an innovative design aid: the Equipment Specification Predictor (ESP). ESP examines the system SPL and speaker requirements for a given project and aids in transforming that data into circuit and amplifier channel requirements. On a system level, CAFÉ supplies a recommendation for optimized placement of channels into amplifiers for the most cost effective solution.

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NomadLink Network

The NomadLink network provides remote monitoring, control, and power sequencing functions for multiple C Series or FP+ Series amplifiers. A full NomadLink network can comprise as many as 16 subnets, each supervised by an NLB 60E NomadLink Bridge & Network Controller. Each subnet can accommodate up to 60 amplifiers, thus allowing a single laptop computer – running Lab Gruppen’s DeviceControl software – to monitor and control as many as 960 amplifiers. NomadLink functions are built into Lab Gruppen C Series and FP+ Series amplifiers as standard; no separate modules need to be installed.

Configuring a NomadLink network is literally a snap. Simply click standard Cat-5 cables into the IN and OUT NomadLink ports on each amplifier to form a daisy chain. Connect the first amplifier to the OUT port of the NLB 60E, and the last amplifier to the IN port, thus forming a closed loop. The closed loop provides a redundant data path and greater network speed, although the network will continue to function if the loop is broken. Amplifiers are detected identified automatically; no IP addresses are required to configure the network.

The NLB 60E front panel provides basic control of on/off and mute functions for the subnet, as well as indication of an amplifier fault on the network. For more powerful control and monitoring features, the NLB 60E serves as a bridge between the NomadLink network and an Ethernet LAN, connecting all subnets to a PC running Lab Gruppen’s proprietary DeviceControl software.

DeviceControl greatly extends the utility of NomadLink by providing a multi-view graphical interface with features for precise individual or grouped control of power on/off and channel mutes as well as detailed monitoring of key parameters with clear warning and fault indications. A Secure Connection feature includes password-protected lockout to prevent unauthorized changes to the configuration or control of the amplifier system.