Lab Gruppen D20-4L
D 20:4L

OUR PART #  D20-4L

The Lab Gruppen D 20:4L is based on the same foundation of robust, high-power amplifier technologies as our renowned PLM Series – an amplifier platform with a proven record of reliability and sonic performance on the world’s most grueling concert tours and in high-profile, large-scale installations.

With the D 20:4L, those same core technologies have been updated and refocused to provide the ultimate solution for the most demanding digitally networked installed sound applications – in stadia, arenas, theme parks, performing arts centers, racecourses and other large commercial sound installations.

In addition to legendary Lab.gruppen reliability and sonic excellence, the D Series incorporates newly refined outputs stage technologies along with installation-targeted hardware and software features that optimize amplifier system design and configuration. Together, these new technologies allow systems integrators to minimize both initial equipment costs and end users’ long-term energy consumption.

At the core of the D Series platform is Rational Power Management (RPM), a proprietary Lab.gruppen technology that allows system designers and integrators unprecedented freedom to allocate the output power available on each channel for optimum performance with specific load conditions. RPM technology also enables the integrator to minimize initial equipment costs and reduce rack space requirement since 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 allowing re-allocation of output power capacity among the four channels - with one channel on the D 20:4L capable of being significantly scaled up, leaving any remaining available power to be allocated to the other channels for less demanding loads.

The D 20:4L can be configured and monitored using the new CAFE (Configuring Amplifiers For the Environment) software suite. In addition to providing comprehensive system surveillance and configuration of RPM features, CAFE includes an innovative design aid – the Equipment Specification Predictor (ESP) – that provides tools for optimum specification of D Series units. ESP examines the system and load requirements and then supplies recommendations for the installation that include model and quantity of D Series units, heat generated, channel distribution, and current draw.  The end result is accurate mains management and precise specification of cooling systems and UPS, when required.

All D Series Lake versions provide extraordinary input flexibility, 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 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 (each with exclusive Iso-float ground isolation), four channels of AES3 digital, and eight dual redundant Dante networked digital inputs. Input signals are individually selectable for each channel, with programmable failover to analog. The full-featured, on-board Lake processor includes group control with Raised Cosine™ MESA EQ™ asymmetric filters to match the responses of many loudspeaker systems.  LimiterMax™ peak and RMS limiters set the industry standard for loudspeaker protection and sonic transparency.

Lab Gruppen D 20:4L Features:

  • Rational Power Management™ (RPM) – True flexibilityin allocating total available power output across channel count for mostefficient use of system inventory
  • Any channel capable of being significantly scaled upfor driving high power elements (e.g. subwoofers)
  • Lake processing Classic/linear-phase/FIR speakerprocessing platform with 4 throughputs
  • Input with multitude of automatic redundancy
  • 4 “Lake class” analog inputs with Iso-Float™ groundisolation
  • 4 AES inputs
  • 8 Dual Redundant Dante™ inputs
  • Integration potential with 3rd party matrix systems including BSS, Q-SYS and MediaMatrix via purpose developed middleware
    CAFÉ (Configuring Amplifiers For the Environment)Software incorporating ESP (Equipment Specification Predictor) for design,system planning and equipment planning, installation and commissioning.
  • Regulated Switch-Mode Power Supply (R.SMPS™)
  • Under-voltage Limiting (UVL™) for continued operationdespite severe voltage drops
  • Best-in-class Power Factor Correction (PFC) withCurrent Draw Modelling
  • Proven and reliable IDEEA Class D Output Stage withdirect drive 70 and V constant voltage systems as well as low impedance
  • Dedicated on-board surveillance & load monitoringsystem
  • Redundant audio inputs and onboard systemsurveillance for mission-critical Voice Alarm applications (PA/VA)
  • Detachable Phoenix plug-in audio connectors for audio I/O

Lab Gruppen D 20:4L Specifications:

  • Processing / Network: Lake / Dante
  • Number of amplifier channels: 4
  • Total burst power all channels (share among channels with RPM): 2000 W
  • Back panel Interface:
    • 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: 4 x 2 pole Terminal block connectors rated at 1000 V / 41 A (exceeding amplifier capacity)
    • Can take up to 8 mm2 (8.2 AWG) cables
    • Ethernet Ports: 2 x EtherCon RJ45 Lake Controller, Dante controller and/or DLM (3rd party protocol)
    • Detachable mains cord: Detachable locking 3-pin IEC rated at 250 V / 16 A
  • Front-panel user interface:
    • System status indication: 3 x tri-color LED. FRAME, TEMP, PSU for device 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 bidirectional device software select functionality
  • Dimensions:
    • Rack rail to rear panel (WxHxD): 19” x 1 U x 16.7” (483 x 44 x 425 mm)
    • Overall depth front-rear support: D: 463 mm
  • Weight: 17.3 lbs (7.9 kg)
  • Finish: Black painted steel chassis with grey painted steel front with detachable grille
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