Lab.gruppen PLM Series Operation Manual
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Lab.gruppen PLM Series Operation Manual

Plm series powered loudspeaker management systems
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Operation Manual
Operation Manual
Operation Manual
PLM
Series
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Powered Loudspeaker Management
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Rev 1.3.5
Item: OM-PLM

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Summary of Contents for Lab.gruppen PLM Series

  • Page 1 Operation Manual Operation Manual Operation Manual Series ™ Powered Loudspeaker Management systems ™ Rev 1.3.5 Item: OM-PLM...

  • Page 2: Important Safety Instructions

    21. An experienced user shall always supervise this professional audio equipment, especially if inexperienced adults or minors are using the equipment. 22. The US National Differences clause 16.3 requires that network cables must be flame rated VW-1. PLM Series Operation Manual Rev 1.3.5...

  • Page 3: Warning

    ▸ Reorient or relocate the antenna. ▸ Increase the separation between the equipment and receiver. PLM Series Operation Manual Rev 1.3.5...

  • Page 4: User Responsibility

    There is also a risk that the unit will malfunction since it is dependent on constant airflow from front to rear. If the dust filters are not clean and the unit malfunctions, any resulting problems will not be covered by the warranty. PLM Series Operation Manual Rev 1.3.5...

  • Page 5: Table Of Contents

    Level Adjustments & Mute Points .....................25 Lake Processing and Control ......................27 Modules and Frames ........................28 Loudspeaker Processor Overview .....................29 Files and Presets ..........................29 Front Panel Interface ..........................31 Overview ............................31 Front Panel Key Lock ..........................32 Power Button ..........................33 PLM Series Operation Manual Rev 1.3.5...
  • Page 6 10.6 Digital Audio Connections ........................93 10.7 Digital Clock Configuration .........................96 11. Technical Specifications ........................98 12. Warranty and Support ..........................99 12.1 General ..............................99 12.2 International Warranties ........................99 12.3 Technical Assistance and Service ......................99 12.4 Trademarks ............................100 PLM Series Operation Manual Rev 1.3.5...

  • Page 7: Welcome

    For fast installation and use of this product, your welcome package includes a printed copy of the PLM Series Quick Start & Field Reference Guide which contains the information required to safely install the product and place it in service. Control and editing features are accessible via the front panel interface or via the included Lake Controller software.
  • Page 8 Welcome 2.2.2.1 Input Gain (Sensitivity) Input gain (sensitivity) is set in the digital domain for PLM Series devices, and may be controlled via the Lake Controller software or front-panel interface. 2.2.2.2 ISVPL ™ The Inter-Sample Voltage Peak Limiter (ISVPL) tailors each power output to the characteristics of the connected load.

  • Page 9: Additional Documentation

    Audio Network ™ PLM Series devices include Dante digital audio networking as standard. Utilizing the latest advances in Ethernet technology, Dante offers simplified system configuration and extremely low latency while deliver- ing very high quality uncompressed digital audio across the Lake network. The Zen automatic configuration ™...

  • Page 10: Installation

    Carefully open the shipping carton and check for any damage to the device or the supplied accessories. Every Lab.gruppen product is tested and inspected before leaving the factory and should arrive in perfect condition. If any damage is discovered, please notify the shipping company immediately. Only the consignee may initiate a claim with the carrier or their insurers for damage incurred during shipping.
  • Page 11 Installation Figure 3-1: Rear Support Bracket and Mounting Hardware Figure 3-2: Use the Washer for Fixed Installations Figure 3-3: Use Tube for Slide-On Installation PLM Series Operation Manual Rev 1.3.5...

  • Page 12: Cooling

    If installing one or more PLM Series devices in a rack with other fan-cooled equipment, be sure that all the other equipment also uses front-to-rear airflow for cooling. If this precaution is not observed, there is a risk of overheating, as units with the reverse airflow will be drawing in air which has already been heated by the PLMs.

  • Page 13: Grounding

    Use correctly-shielded balanced audio input connections to minimise hum and interference. Please refer to section 8.2.4 for further information. NEVER disconnect the earth (ground) pin on the mains cable (AC power cord). PLM Series Operation Manual Rev 1.3.5...

  • Page 14: Product Overview

    Two dust filters are fitted behind metal covers. To remove the covers, loosen the thumbscrews located behind the handles. Once detached, the dust filter elements can be removed for cleaning; please refer to section 9.2 for further information. NEVER operate this device without the dust filters in place. PLM Series Operation Manual Rev 1.3.5...
  • Page 15 Please refer to chapter 7 for further details. Standby PLM Series devices are powered on and to standby using the top-left button, or via the Lake Controller. Mute Enable Select MUTE ENABLE to allow the dynamic function buttons to operate as mute controls for the Module inputs and power output channels.
  • Page 16 The EXIT button is used primarily while navigating the menu system in Menu Mode; pressing EXIT will return the menu up one level. In Meter Mode, pressing EXIT returns the metering display to the default Home View. PLM Series Operation Manual Rev 1.3.5...

  • Page 17: Back Panel Overview

    Product Overview Back Panel Overview Figure 4-2: Back Panel Layout Options for a 4-channel PLM Figure 4-3: Back Panel Layout Options for a 2-channel PLM PLM Series Operation Manual Rev 1.3.5...

  • Page 18: Input And Link Connectors

    +26 dBu. Analog Links Two latching XLR3M connectors are fitted adjacent to the analog input connectors. These are paralleled to the input connectors to provide an unprocessed analog loop-through to feed additional PLM Series units, or other equipment. AES3 Inputs A latching XLR3F connector is provided which accepts an AES3 digital audio signal.
  • Page 19 Lake Processor. The daisy chain topology should not be used with Dante. For a technical reference of the Ethernet Port, please refer to section 8.4 . Additional information is also available in the Lake Network Configuration Guide. PLM Series Operation Manual Rev 1.3.5...
  • Page 20 (LINK) and network activity (ACT). Secondary Connector The secondary network connector can be used to daisy-chain multiple LM & PLM Series devices. Alterna- tively, a Dante dual-network topology can be created by connecting all secondary network connectors to a separate Ethernet switch, ensuring full redundancy in the event of a network component failure.

  • Page 21: Operation And Performance

    Operation and Performance 5. Operation and Performance This chapter provides comprehensive information on PLM Series connection, setup, operation and perfor- mance. The detailed information included here is essential to realizing the full functionality of the PLM Series devices. Operation Precautions Make sure that the Standby button on the PLM’s front panel is either unlit (OFF), or red (STANDBY), before...

  • Page 22: Asymmetrical Power

    Power ratings are based on a duty cycle of 25 ms full power every 400 ms. Between bursts, a lower signal level applies, such that the continuous average power is 1/8th of the rated power. PLM Series Operation Manual Rev 1.3.5...

  • Page 23: Amplifier And Load Protection Systems

    VCL and CPL. ▸ Sub/LF – The Sub/LF profile is tuned for frequency bands below 600Hz. It has longer attack and release times and is less conservative when it comes to acting upon VCL and CPL. PLM Series Operation Manual Rev 1.3.5...
  • Page 24 1722 1292 1225 17.8 Table 5-3: ISVPL-to-output examples These ratings shown in Table 5-3 are limited by the CPL (Current Peak Limiter) functions, not by ISVPL settings, due to power output channel current capacity. PLM Series Operation Manual Rev 1.3.5...
  • Page 25 The ISVPL threshold may be set at any level between 17.8 V and 600 V via the PLM’s menu system. For further details, please refer to section 7.11.2.5 of this manual, and also to the PLM Series chapter in the Lake Controller User Manual.
  • Page 26 65 V, then at 65 V the power supply is shut down. The mains supply is continually monitored and when sufficient voltage returns the power supply automatically restarts. PLM Series Operation Manual Rev 1.3.5...

  • Page 27: Temperature Protection

    Temperature Protection 5.3.8.1 Overview PLM Series devices are equipped with a sophisticated temperature sensing system that provides protection from overheating which may occur as a result of inadequate ventilation or excessive power output. Thermal measurements are made at several points within each power output channel along with measure- ments in the power supply and DSP areas.

  • Page 28: Vhf Protection

    This protection system recognizes that continuous VHF signals at high levels do not appear in speech or music. Any such content can therefore be considered as a fault condition. VHF protection is essential to avoid damage to HF drivers. PLM Series Operation Manual Rev 1.3.5...
  • Page 29 Operation of the VHF protection circuits is indicated by one (or more) of the output channel LEDs (in the right-hand soft function buttons) showing steady red. The adjacent fault message will show VHF FAULT. It is also reported as a fault via the control network. PLM Series Operation Manual Rev 1.3.5...

  • Page 30: Power Supply

    If insufficient power is available to allow simultane- ous power-up, then there is probably insufficient capacity for full power output during operation. It is recommended that additional capacity is added to the mains power distribution system. PLM Series Operation Manual Rev 1.3.5...

  • Page 31: Signal Flow And Lake® Processing

    Signal Flow The figures below depict the audio signal flow for a PLM Series device. It is worth noting that this sophis- ticated device provides seven points in the signal chain where the signal level can be adjusted, muted or disconnected.
  • Page 32 The ISVPL setting is made via MENU > MODULE > LIMITERS > ISVPL, and can also be set from the Lake Controller software. Figure 6-2: Signal Flow Diagram (4-channel PLM Part 2) PLM Series Operation Manual Rev 1.3.5...

  • Page 33: Lake Processing And Control

    PSU temperature to the appropriate protection circuits. Please refer to section 5.3 on page 17 further details. Table 6-1 lists PLM Series analog input sensitivity in dBu and Vrms for various Amp Gain settings and maximum/minimum ISVPL settings, assuming an analog input headroom of 26 dBu.

  • Page 34: Modules And Frames

    In addition to the standard loudspeaker presets (Module files), the Lake Controller also includes a set of enhanced Module files specifically for use with the PLM Series. These supplementary PLM Module files, known as the LoadLibrary incorporate both Lake DSP parameters along with PLM specific data;...

  • Page 35: Loudspeaker Processor Overview

    Signal Flow and Lake® Processing Loudspeaker Processor Overview The Lake Processing system within PLM Series devices may be configured with up to two processing Modules containing a total of up to six processing Module outputs, although the number of power outputs will be either two or four depending on the PLM model being used.
  • Page 36 Using the System Presets function in the Lake Controller, entire system configurations can be stored and recalled across a network of LM & PLM Series devices. This enables fast retrieval and switching of entire system configurations as minimal data is being sent between the Controller and Processors.

  • Page 37: Front Panel Interface

    PLM or its inputs, while those to the right indicate problems with the power output channels. Please note that the same LEDs also indicate the mute status of inputs (left) and outputs (right). Further information on faults and warnings is provided in section 7.8.5 and section 9.1. PLM Series Operation Manual Rev 1.3.5...

  • Page 38: Front Panel Key Lock

    Figure 7-2; repeat this process to unlock. Figure 7-2: Locking / Unlocking Front Panel Controls A key icon will appear at the top of the display when the Front Panel is locked. PLM Series Operation Manual Rev 1.3.5...

  • Page 39: Power Button

    Pressing the MENU button while in Menu Mode will display the previous menu level. Menu Mode is used for processor configuration, or for editing a parameter. Please refer to section 7.11 for further details. PLM Series Operation Manual Rev 1.3.5...

  • Page 40: Exit Button

    This LED turns red to indicate a Frame fault and turns yellow to indicate a Frame warning. Additional clari- fication of the fault or warning is displayed in the LCD. All mute, fault and warning states displayed on the front panel are summarized in section 9.1. PLM Series Operation Manual Rev 1.3.5...

  • Page 41: Rotary Encoder

    In Menu Mode these buttons are used to navigate the menu structure.During menu navigation, the color of the embedded LEDs continue to indicate the mute status, or clips, faults and warnings relevant to the associated input or output channel on the PLM. PLM Series Operation Manual Rev 1.3.5...

  • Page 42: Mute Functions

    The PLM Input Mute is within the Lake Processing system, post input type selection, and pre input mixing and routing. Please refer to the Lake Controller User Manual for details of mute selection via the software. PLM Series Operation Manual Rev 1.3.5...

  • Page 43: Module Input Mute

    When a PLM power output is muted, the LED turns red and the text AMP CH. MUTE is displayed on the LCD. When unmuted, the LED turns green (unless any other output warning conditions are active). PLM Series Operation Manual Rev 1.3.5...
  • Page 44 Output Clip All output channels are monitored by a suite of protection circuits that include a Current Peak Limiter (CPL) and an Inter-Sample Voltage Peak Limiter (ISVPL). Please refer to section 5.3 for further information. PLM Series Operation Manual Rev 1.3.5...

  • Page 45: Warning And Fault Indications

    Please refer to Table 7-2 and Table 7-3 below, and to Table 9-1 on page 77, for a detailed description of faults and warnings. Warning and Fault Indications Table 7-2 lists the warning conditions signified by a yellow LED; Table 7-3 lists the fault conditions signified by a red LED. PLM Series Operation Manual Rev 1.3.5...
  • Page 46 SPKR DAMAGED Speaker Component Damaged SpeakerSafe Not Started SPKSAFE INACT SpeakerSafe Not Started SpeakerSafe Precision Low LM PREC. LOW SpeakerSafe Precision Low 20000Q Under Voltage Limit Frame UVL ACTIVE Table 7-2: Warning Conditions (Yellow LED) PLM Series Operation Manual Rev 1.3.5...
  • Page 47 VHF Protection Channel VHF FAULT Channel Fault: Very High Frequency Voltage Protection Limiter Channel VOLTAGE CLIP Wrong Type of Speaker Channel WRONG LOAD Load Type / Routing Mismatch Table 7-3: Fault Conditions (Red LED) PLM Series Operation Manual Rev 1.3.5...

  • Page 48: Meter Mode

    Power output 2 label, gain & limiter meters, faults, warnings, clips & mutes. Power output 3 label, gain & limiter meters, faults, warnings, clips & mutes. Power output 4 label, gain & limiter meters, faults, warnings, clips & mutes. PLM Series Operation Manual Rev 1.3.5...
  • Page 49 Home View looks similar for most configurations, with slight variations dependant on the PLM model and processor configuration. Module View Module View provides further signal level information in the form of additional power output meters as shown in Figure 7-6. Figure 7-6: Meter Mode > Module View PLM Series Operation Manual Rev 1.3.5...
  • Page 50 Temperature View provides information about the current operating temperatures within the PLM and the connected loudspeakers. Figure 7-7: Meter Mode > Temperature View Current View title. Power supply temp (PSU) & Lake processor temp (DSP) as percentage of maximum PLM Series Operation Manual Rev 1.3.5...
  • Page 51 Input View enables inspection of the input signal before the input mixer (i.e. prior to the Home View Module input meters). Figure 7-8: Meter Mode > Input View Current View title & Frame label, Frame faults and warnings Input Router 1: Selected input type, input gain level (relative to clip), router fault/warning/clip PLM Series Operation Manual Rev 1.3.5...

  • Page 52: Menu Mode

    Press the illuminated button adjacent to the required option to display an associated submenu. When parameter level is reached, individual parameters may be selected for adjustment by pressing the adjacent button. The selected parameter value/s are highlighted, and are adjustable using the rotary encoder. PLM Series Operation Manual Rev 1.3.5...
  • Page 53 MODULE (See section 7.11.2) ▸ Gain ▸ Delay ▸ Polarity ▸ Amp Gain ▸ Limiters ▸ Mute ▸ INPUT CONFIGURATION (See section 7.11.3) ▸ Router 1 ▸ Router 2 ▸ AES Termination ▸ Iso-Float PLM Series Operation Manual Rev 1.3.5...

  • Page 54: Module Submenu

    MENU > MODULE After selecting the Module Menu, the screen shown in Figure 7-10 is displayed. Press the illuminated button adjacent to the required option to view or edit the associated parameters. Figure 7-10: Module Submenu PLM Series Operation Manual Rev 1.3.5...
  • Page 55 Audio phase reversal is available at the inputs to Module A and Module B, and also individually on the six output channels. The LCD displays ‘Positive’ for normal operation, and ‘Negative’ when the phase is inverted. PLM Series Operation Manual Rev 1.3.5...
  • Page 56 Threshold can be adjusted between 17.8 V to 600 V, which represents the instantaneous peak voltage, not the RMS value of the output signal. The actual value is displayed in brackets and can be limited by the maximum voltage a particular PLM Series model can produce. Inter-Sample Voltage Peak Limiter Profile (ISVPL Profile) Selecting the ISVPL Profile will optimize the ISVPL limiting for the specific frequency band.
  • Page 57 Front Panel Interface The default ISVPL Profiles differ depending on the PLM Series model: ▸ PLM 10000Q / 20000Q: UNIVERSAL ▸ PLM 14000: SUB/LF MaxPeak Level (MaxPeakLvl) This sets the maximum peak signal level at the Module outputs. It is adjustable from -30 dBu to +30 dBu in 0.1 dB increments, subject to user-defined level limits.
  • Page 58 Figure 7-13: Input Router 1 The signal flow diagrams in chapter 6 highlight that there are two Input Routers available on PLM Series devices. The input that is selected within the router can be used by the Input Mixer for either Module A or Module B.
  • Page 59 The maximum input level accepted by the analog input pre-amplifiers without clipping may be set to 12 dBu or 26 dBu. Digital gain offset may be applied to AES3 digital input signals in 0.1 dB increments from -100 dB to +15 dB. PLM Series Operation Manual Rev 1.3.5...
  • Page 60 DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only terminate the last processor in the chain. 7.11.3.3 Iso-Float MENU > I/O CONFIG > ISO-FLOAT Figure 7-15: Iso-Float Menu PLM Series Operation Manual Rev 1.3.5...

  • Page 61: Attenuation Submenu

    Figure 7-16) or, press a single button on the right to adjust a channel individually. For 4-channel PLMs, only ONE channel or ALL channels may be adjusted. It is not possible to adjust only two or three channels. PLM Series Operation Manual Rev 1.3.5...

  • Page 62: Frame Submenu

    In many cases, the system latency is so small compared to time-alignment delay that it can be ignored. PLM Series Operation Manual Rev 1.3.5...
  • Page 63 A Soft Reset will reset all settings and parameters to the original factory-defined default values, but retains Frame Preset information and IP / Network configuration. A power cycle is not required to complete this type of reset. PLM Series Operation Manual Rev 1.3.5...
  • Page 64 When Latency Match is ON the LM Series device adds delay to match the overall processing delay of legacy Lake Contour Pro 26 and Mesa Quad EQ products. Please refer to the Lake Controller Operation Manual for further information. PLM Series Operation Manual Rev 1.3.5...
  • Page 65 To adjust the order in which both inputs and outputs are displayed on the front panel in all views, select this option then use the rotary encoder to change the value between TOP-DOWN (default) and BOTTOM-UP. 7.11.7 Frame Preset Menu MENU > FRAME PRST Figure 7-19: Frame Preset Menu PLM Series Operation Manual Rev 1.3.5...

  • Page 66: Loadsmart Verification

    Frame Presets must initially be created in the Lake Controller, and stored as a Preset using the Lake Controller or the PLM Series Preset Manager. Up to 100 Frame Presets can be stored in the device. The data within a Frame Preset includes the configura- tion of all Modules in the Frame including levels, crossovers, EQ, input mixer, and output routing.
  • Page 67 If the range of displayed voicecoil temperatures contains one or more anomalous results, the Lake Controller should be used to manually enter the starting temperature for SpeakerSafe. Please refer to the PLM Series chapter in the Lake Controller Operation Manual for further information .
  • Page 68 Pressing the DANTE button from the main menu will display this screen only if Dante has previously been enabled via the Lake Controller software. Please refer to the Lake Controller Operation Manual for further details regarding Dante implementation. PLM Series Operation Manual Rev 1.3.5...

  • Page 69: Back Panel Interface

    Figure 8-1 shows a 2-channel PLM 14000 with speakON connections. speakON connections are also available on the 4-channel PLM 10000Q and PLM 20000Q. Sections 8.1.2.1 and 8.1.2.2 describe the wiring, pin-out and output configuration for the 2- and 4-channel models respectively. PLM Series Operation Manual Rev 1.3.5...
  • Page 70 Table 8-1: speakON Wiring and Pinouts for 2-channel PLMs (incl. Bridge Mode) PLM Output Channels 1 & 2 BRIDGE MODE PLM Output Channels 1 & 2 PLM Output Channels 2 & 1 Figure 8-3: speakON NL4 Configurations for 2-channel PLMs (incl. Bridge Mode) PLM Series Operation Manual Rev 1.3.5...
  • Page 71 Ch. 3 o/p + Ch. 2 o/p - Ch. 2 o/p - Ch. 4 o/p - Ch. 3 o/p + Ch. 4 o/p - Table 8-3: speakON wiring and pinouts for 4-channel PLMs (Bridge Mode) PLM Series Operation Manual Rev 1.3.5...
  • Page 72 Binding post versions of the PLM are fitted with four pairs of black and red 4 mm binding posts. 4-channel PLMs provide the output for one power output channel on each pair of binding posts as shown in Figure 8-7. PLM Series Operation Manual Rev 1.3.5...
  • Page 73 CH 2 CLASS 3 WIRING Figure 8-9: 2-channel PLM Binding Post Configuration SPEAKER OUTPUTS CH 1 CH 2 CH 1 CH 2 CLASS 3 WIRING Figure 8-10: 2-channel PLM Binding Post Configuration (Bridge Mode) PLM Series Operation Manual Rev 1.3.5...

  • Page 74: Analog Inputs And Outputs

    If more links are required, use a good quality balanced audio line driver or distribution amplifier. 8.2.2 Analog & AES3 XLR Wiring and Pin Out All XLR connections are wired to IEC268 as shown in Figure 8-12. PLM Series Operation Manual Rev 1.3.5...

  • Page 75: Unbalanced Operation

    The method shown in Figure 8-13 uses twin-and-screen (balanced) cable and standard XLR pin connections at the PLM Series device end, with the cold wire and the cable screen connected to the signal ground of the equipment at the source end.

  • Page 76: Aes3 Digital I/O

    The practical limit will be determined by cable type and length as well as the output circuit of the driving source. It may be necessary to employ an AES3 line driver or distribution amplifier to achieve reliable results in some situations. PLM Series Operation Manual Rev 1.3.5...

  • Page 77: Rj45 Ethercon Network Connections

    Pre-made cables with moulded RJ45 plugs are recommended. If it is necessary to make up custom Cat-5e network cables, use pinout described in Table 8-4. Pin No. Color Brown Brown + White Green Blue + White Blue Green + White Orange Orange + White PLM Series Operation Manual Rev 1.3.5...

  • Page 78: Power Inlet

    The power cable (AC cord) supplied with the PLM has the mating connector ready-fitted, but may require a mains (AC) plug specific to your country to be fitted to the other end. The wiring an pinout details are shown in Table 8-5. PLM Series Operation Manual Rev 1.3.5...
  • Page 79 Back Panel Interface powerCON 230 V 115 V Version Version Brown Black Blue White Green/Yellow Green Table 8-5: powerCON Connector Wiring and Pinout PLM Series Operation Manual Rev 1.3.5...

  • Page 80: Appendix

    Current Peak Limiter has become active to limit it. INPUT CLIP Clip The input signal level is too high and is causing clipping at the input stage PLM Series Operation Manual Rev 1.3.5...
  • Page 81 The chosen input type has been deselected or lost and the input type selector has no alternative input sources in the priority list. NO LOAD Channel Fault: No Load Fault No load detected at the power output Detected channel. PLM Series Operation Manual Rev 1.3.5...
  • Page 82 TEMP FLT:DSP Temp Fault: DSP Area Fault The temperature of the PLM’s process- ing circuitry has exceeded its safety limit. Audio is not muted, but continued operation at this temperature is not recommended. PLM Series Operation Manual Rev 1.3.5...
  • Page 83 Load Type / Routing Mismatch Fault LoadSmart is measuring load charac- teristics which differ from those of the assigned speaker type. Table 9-1: Warning, Fault and Mute Indications (alphabetical by LCD Text / Event Log Text) PLM Series Operation Manual Rev 1.3.5...

  • Page 84: Maintenance

    0 ms Polarity: Positive (In phase) MaxRMS: 20 dB MaxPeak: 21 dB Amp Gain: 35 dB ISVPL: 153 V [PLM 10000Q] 193 V [PLM 14000] 194 V [PLM 20000Q] Input & Output EQ: Flat PLM Series Operation Manual Rev 1.3.5...

  • Page 85: Current Draw And Thermal Dissipation Specifications

    Enabled Current Draw and Thermal Dissipation Specifications The tables in this section provide measured current consumption and calculated heat dissipation for five different operating conditions for each PLM Series device. 1. Standby Mode 2. Power On (Idle - No Signal) 3.
  • Page 86 L A B . G R U P P E N A B S W E D E N PLM Series Operation Manual Rev 1.3.5 I N T E R N A T I O N A L C O N T A C T I N F O @ L A B G R U P P E N .
  • Page 87 *4) Italics used for conditions that, if sustained over long time periods, may trigger the mains breaker. Therefore these measurements should not be used when calculating cooling requirements as they cannot be sustained by the mains breaker over time. Table 9-3: PLM 14000 Current Draw and Thermal Dissipation PLM Series Operation Manual Rev 1.3.5...
  • Page 88 Note that the max. power condition is very extreme and will not occur during normal operation. Also note that the mains breaker will not be tripped even if operation is momentarily in excess of max. ratings. Table 9-4: PLM 10000Q Current Draw & Thermal Dissipation PLM Series Operation Manual Rev 1.3.5...

  • Page 89: Glossary Of Terms, Acronyms And Abbreviations

    Various techniques may be employed to ensure that this is the case. An abbreviation for Current Peak Limiter, a Lab.gruppen protection technique which ensures that the amplifier’s output transistors can never attempt to deliver more than their rated current.
  • Page 90 Linear Phase Crossover See FIR Filters. The Lake Controller includes LoadLibrary, a set of Module files specific to the PLM Series. These Modules include a database of the Load Library electrical characteristics of various popular loudspeakers in addition to the standard Module data. The PLM uses the load data when verifying and monitoring amplifier loads.
  • Page 91 Secondary Ethernet Port connection of a separate second network for full redundancy. A Lab.gruppen proprietary protective circuit designed to mute a channel when a short circuit is detected at its output terminals to Short Circuit Protection prevent damage to the device.

  • Page 92: Application Guide

    Application Guide 10. Application Guide This chapter describes the practical application and use of PLM Series devices. 10.1 Rack I/O Panels For fast and simple system connection, pre-wired racks using connection panels can be used. With an I/O connector panel fitted to the front of the rack, all audio, loudspeaker, network and power cables can be plugged in at one position, without requiring rear panel access.

  • Page 93: Gain Structure

    10.3 Gain Structure The PLM Series architecture provides gain adjustments at various points in the signal path and therefore, various places for muting and level adjustment. Each mute or gain adjustment point serves a different purpose.
  • Page 94 2. User Gain is editable by a user unless the system designer has locked away the parameter; adjust via MODULES > LEVELS. Generally, output gain values are configured within a Module / loudspeaker preset file and should not need to be adjusted further. PLM Series Operation Manual Rev 1.3.5...

  • Page 95: Gain / Level Optimization

    This section provides examples on performance effects resulting from changes to the PLM gain structure. 10.4.3.1 Digital Input Gain Structure Examples Figure 10-2 illustrates the recommended configuration of the PLM when using an AES or Dante digital input. PLM Series Operation Manual Rev 1.3.5...
  • Page 96 Figure 10-3: Digital Input Optimized for Minimum Noise - Not Recommended The improvement in noise performance (at the cost of losing headroom and compression features) is only 0.6 dB; it is therefore not recommended to optimize performance in this manner. PLM Series Operation Manual Rev 1.3.5...
  • Page 97 -80,0 -100,0 -120,0 -140,0 Analog AES Input Input Mixer Module In Module Out Attenuation Analog Ref Amp Gain ISVPL Output Figure 10-5: Analog: Low Noise with Full Output Power (Low Input / High SPL) PLM Series Operation Manual Rev 1.3.5...

  • Page 98: Speaker Configurations

    Nominal loads as low as 2 ohms are supported by the PLM. However, a 2 ohm nominal load has impedance dips at its resonances below 2 ohms; in such cases it is likely that the resulting higher current will cause CPL to activate. PLM Series Operation Manual Rev 1.3.5...

  • Page 99: Digital Audio Connections

    Therefore, the lowest latency is always preferred, and it is always important to consider system latency delays when calculating and adjusting overall delay for time-aligning multiple loudspeaker systems. PLM Series Operation Manual Rev 1.3.5...

  • Page 100: Connections And Cabling

    10.6.3.2 Interconnection Options If multiple PLM Series devices are receiving the same AES3 signal, connections may be configured in two ways: 1. Daisy-Chain – Connect the signal source (e.g. mixing console, digital snake or distribution amplifier) to the AES3 input on the first PLM.

  • Page 101: External Signal Distribution Hardware

    Attenuation is minimal, but there is no refreshing of the signal. 10.6.5 Additional Reference Material Complete technical information on the AES/EBU (AES3) standard can be downloaded from the AES web site at http://www.aes.org/publications/standards/. PLM Series Operation Manual Rev 1.3.5...

  • Page 102: Digital Clock Configuration

    The PLM digital clocking system can either generate its own internal clock, or synchronize to an incoming external clock source via the AES3 digital input. 10.7.2 Clock Source Priorities There are two options for clock source configuration: Manual Configuration or Automatic Detection. PLM Series Operation Manual Rev 1.3.5...
  • Page 103 Master / Slave status is also displayed in the Lake Controller. The Dante Preferred Master setting can be set from the Lake Controller I/O Configuration screen, or via the Dante Controller. For further information on Digital Clock configuration and the Lake Controller user interface, please refer to the Lake Controller Operation Manual. PLM Series Operation Manual Rev 1.3.5...

  • Page 104: Technical Specifications

    Note 1): Asymmetrical loading of the outputs will yield even higher ratings. If one (or two) channel(s) has reduced power requirements, then the voltage drop from the power supply will be reduced, resulting in higher power availability for the other channel(s).    Note 2): Separate 230 V or 115 V versions available. Not selectable on the product. All specifications are subject to change without notice. PLM Series Operation Manual Rev 1.3.5...

  • Page 105: Warranty And Support

    12. Warranty and Support 12.1 General This product is manufactured by Lab.gruppen, and it is warranted to be free from any defects caused by components or factory workmanship, under normal use and service, for a period of six (6) years from date of purchase from an authorized Lab.gruppen dealer.

  • Page 106: Trademarks

    Warranty and Support 12.3.2 Factory Service In the event a Lab.gruppen product requires factory service, you may contact Lab.gruppen’s service depart- ment for return instructions and a Return Authorization number. Please note for product return: Use the original packing. Include a copy of the sales receipt, your name, return address, phone and fax number, email address and description of the defect.
  • Page 107 Operation Manual Operation Manual L A B . G R U P P E N A B ► S W E D E N I N T E R N A T I O N A L C O N T A C T ► I N F O @ L A B G R U P P E N . C O M U S &...

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