Lake LM 26 Operation Manual
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Lake LM 26 Operation Manual

Digital audio loudspeaker processor
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Operation Manual
Lake
LM 26
®
Digital Audio Loudspeaker Processor
Rev 1.2.3
Item: OM-LM26

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Summary of Contents for Lake LM 26

  • Page 1 Operation Manual Lake LM 26 ® Digital Audio Loudspeaker Processor Rev 1.2.3 Item: OM-LM26...

  • 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. LM 26 Operation Manual rev 1.2.3...

  • Page 3: Warning

    ▸ Reorient or relocate the antenna. ▸ Increase the separation between the equipment and receiver. ▸ Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. LM 26 Operation Manual rev 1.2.3...

  • Page 4: User Responsibility

    There is also a risk that the unit will malfunction since it is dependent on constant airflow from left to right. If the dust filter is not clean and the unit malfunctions, any resulting problems will not be covered by the warranty. LM 26 Operation Manual rev 1.2.3...

  • Page 5: Table Of Contents

    Grounding .............................4 Product Overview ............................5 Front Panel Overview ...........................5 Back Panel Overview ...........................7 Signal Flow and Lake Processing ......................10 Signal Flow ............................10 Lake Processing and Control ......................11 Modules and Frames ........................11 Loudspeaker Crossover Configuration Overview ................12 Files and Presets ..........................
  • Page 6 Gain / Level Optimization ........................50 Digital Audio Connections ........................50 Digital Clock Configuration .........................52 10. Technical Specifications ........................55 11. Warranty and Support ..........................56 11.1 General ..............................56 11.2 International Warranties ........................56 11.3 Technical Assistance and Service ......................56 11.4 Trademarks ............................57 LM 26 Operation Manual rev 1.2.3...

  • Page 7: Welcome

    2. Welcome Introduction Thank you for choosing the Lake LM 26. We are confident that you will be pleased with the performance, unique features, configuration flexibility, reliability, and long-term durability offered by this product. For fast installation and use of this product, your welcome package includes a printed copy of the LM 26 Quick Start &...

  • Page 8: Additional Documentation

    If you intend to use the device as part of a networked system, or access features via the Lake Controller, please refer to the various supporting documents which can be located via these methods: ▸...

  • Page 9: Installation

    Cooling The Lake LM 26 uses a forced-air cooling system, with airflow from right to left. The dust filter on the air intake (right-side) should be regularly cleaned, especially after exposure to dusty environments, to ensure the maximum possible airflow through the unit.

  • Page 10: Operating Voltage

    LM 26 is approved. The LM 26 utilizes a universal power supply, and will operate within the range 70-265V~50-60Hz : 30W. If the plug on the IEC cable provided is not appropriate for your country, a locally-sourced IEC cable with the appropriate molded plug should be used.

  • Page 11: Product Overview

    Standby The LM 26 is powered on and to standby using the left-most button, or via the Lake Controller. All audio in and out of the processor is muted when in Standby mode. Network communication remains active to allow the LM 26 to be turned on via the Lake Controller.
  • Page 12 The function of these buttons change according to the currently selected view or menu. The left LED in the top button illuminates white to indicate the Frame is selected in the Lake Controller, or flashes white to indicate communication from the Lake Controller. If this button is pressed while in Home View, and with the Lake Controller on the Home page or the Modules Menu, then Module A of the selected frame will be highlighted in the Controller.

  • Page 13: Back Panel Overview

    The right bi-color LED in the top button illuminates red or yellow to indicate faults or warnings. If this button is pressed while in Home View, and with the Lake Controller on the Home page or the Modules Menu, then Module B of the selected frame will be highlighted in the Controller.
  • Page 14 Six analog outputs are provided via standard XLR3M connections. The outputs are electronically balanced and feature Lake Iso-Float circuitry. The output impedance is 50 ohms, providing a maximum output level of +21 dBu. Please refer to section 7.1 for further information.
  • Page 15 Mains Power Connector A universal power supply capable of accepting 70-265 V ~ 50-60 Hz : 30 W is built into the LM 26. The IEC power cable provided includes a locking feature via a pin on the bottom of the connector; the connector can accept standard or locking IEC power cables.

  • Page 16: Signal Flow And Lake Processing

    5. Signal Flow and Lake Processing Signal Flow Figure 5-1 depicts the audio signal flow inside an LM 26. It is worth noting that this sophisticated device provides five points in the signal chain where the signal level can be adjusted, muted or disconnected.

  • Page 17: Lake Processing And Control

    5.3.1 Overview A Frame represents one physical Lake Processor (e.g. a PLM or LM 26). A maximum of two Modules are contained within each Frame; these are referred to as Module A and Module B. The number of Modules shown in a given Frame is dependent upon the signal processing configuration of that Frame.

  • Page 18: Loudspeaker Crossover Configuration Overview

    Loudspeaker Crossover Configuration Overview The Lake Processing system within LM 26 devices may be configured with up to two inputs and up to six Module outputs. Each set of processing elements is referred to as a Module and can be configured as crossovers, full-bandwidth auxiliary outputs, or a combination of the two.
  • Page 19 Using the System Presets function in the Lake Controller, entire system configurations can be stored and recalled across a network of LM 26, PLM, Mesa Quad EQ, Contour Pro 26, and Dolby Lake Processors. This enables fast retrieval and switching of entire system configurations as minimal data is being sent between the Controller and Processors.

  • Page 20: Front Panel Interface

    Highlighting a Module in the Lake Controller software via the LM 26 It is sometimes useful to identify which Module icon/s in the Lake Controller software are associated with a particular hardware Frame. To highlight the module in the Lake Controller software:...

  • Page 21: Front Panel Key Lock

    2. Press the button adjacent to the Module description on the LCD If the Frame is online, but the Module is not in the work area, the selected Module will be centred on the Module scroll bar (assuming the Modules Menu is selected in the Lake Controller). Front Panel Key Lock It is possible to lock the front panel buttons for security purposes.

  • Page 22: Menu Button

    Figure 6-3: LCD with Dynamic Buttons, Controls and LEDs 6.7.1 Communication LED This bright white LED signifies selection in the Lake Controller, or Controller communication providing visual confirmation of: 1. Network communication between the Lake Controller and the Lake Processor (Flashing LED).
  • Page 23 . Additional faults and warnings are reported in the Event Log of the Lake Controller only. All faults and warnings recorded in the Event Log are listed in section 8.1 along with scenarios that may have arisen to cause them.

  • Page 24: Module I/O Mute Buttons And Led Meters

    Table 6-3: Module I/O Mute Buttons and LED Meters The LM 26 provides mute functions at several points in the audio signal path. Please refer to section 5.1 for mute locations and descriptions. Three types of mute are available from the front panel: 1.
  • Page 25 Front Panel Interface LM 26 Input Mutes are displayed on the LCD screen in Input Meter Mode and are controlled using the adjacent buttons and rotary encoder. The Input Mutes can also be viewed and changed via the front panel I/O CONFIG Menu.

  • Page 26: Meter Mode

    Dante Clock Master (no icon = Dante Slave or Dante Disabled) AES3 Input Terminated (no icon = Unterminated) Analog Inputs Iso-Float Grounded (no icon = Floating) Analog Outputs Iso-Float Grounded (no icon = Floating) LM 26 Operation Manual rev 1.2.3...

  • Page 27: Menu Mode

    If an LM 26 input is muted, the top-right LED is illuminated red as shown in Figure 6-6, and the frame fault text in section A of the screen will display INPUT MUTE. The fault and warning LED illuminates red or yellow in all Meter and Menu Views as described in section .
  • Page 28 Groups function in the Lake Controller. The Group total is the sum of the individual Module value plus any values for this parameter on all Groups to which the Module is assigned. Please refer to the Lake Controller Operation Manual for further information on Groups.
  • Page 29 After selecting the Module Menu, the screen shown in Figure 6-8 is displayed. Press the illuminated button adjacent to the required option to view or edit the associated parameters. Figure 6-8: Module Submenu 6.10.2.1 Mixer Gain MENU > MODULE > MIXER GAIN Figure 6-9: Module Input Mixer Gain Edit Screen LM 26 Operation Manual rev 1.2.3...
  • Page 30 3. Module A & B Combined Summary (without Group totals) Pressing any other illuminated button on any of these three screens allows direct editing of the Module parameter using the rotary encoder. Figure 6-11: Module A+B Combined Gain Summary Edit Screen LM 26 Operation Manual rev 1.2.3...
  • Page 31 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. The Group total is displayed (in brackets) for each channel. LM 26 Operation Manual rev 1.2.3...
  • Page 32 LimiterMax provides peak and RMS limiting features, referred to as MaxPeak and MaxRMS respectively. Full details regarding LimiterMax can be found in the Lake Controller Operation Manual. 6.10.3 I/O Config Submenu MENU > I/O CONFIG Figure 6-12: I/O Config Submenu This menu provides configuration options for input and output routing, along with settings for AES Termina- tion and Iso-Float as described in the following sections.
  • Page 33 Figure 6-13: Input Router 1 Figure 5-1 on page 10 shows that there are six Input Routers available on the LM 26. The signal from the first four Input Routers can be routed to the Input Mixer for Module A & B, or directly to any output.
  • Page 34 This is equivalent to the DISPLAY DETAILS option in the Lake Controller. Adjust a parameter by pressing the associated button, and then use the rotary encoder to change the value.
  • Page 35 However, pin 1 of the XLR input connector may be connected to ground within the LM 26 if desired. This option is selected by using the rotary encoder to toggle between FLOATING and GROUNDED.
  • Page 36 ’ identifies that routing is unavailable for this routing point, normally because another audio channel is already routed to the output. All three states are shown in inverse video when they are selected by the cursor. 6.10.4 Frame Submenu MENU > FRAME Figure 6-17: Frame Menu LM 26 Operation Manual rev 1.2.3...
  • Page 37 Front Panel Interface The Frame Menu provides information and options relating to the LM 26 as a physical unit. It is referred to as a Frame for consistency with Lake Controller terminology. 6.10.4.1 Frame Info MENU > FRAME > FRAME INFO Frame Info provides information about the device settings and configuration.
  • Page 38 When Latency Match is ON the LM 26 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.
  • Page 39 GPI closed to open transition when the selected GPI is currently open is not executed until the next transi- tion to open. A change in GPI open/closed state occurring when the LM 26 is disconnected from power will be acknowledged and executed when power is reconnected.
  • Page 40 Two input options (GPI) and two output options (GPO) may be set at any one time. The default GPIO configuration is shown in Table 6-6. The current state (open/closed) is reported for all GPIO settings on the LM 26 front panel and in the Lake Controller software. LM 26 Operation Manual rev 1.2.3...
  • Page 41 To adjust the front panel LCD contrast, select this option then use the rotary encoder to change the value. Dimming To adjust the front panel LCD brightness, select this option then use the rotary encoder to change the value. 6.10.6 Frame Preset Menu MENU > FRAME PRST Figure 6-22: Frame Preset Menu LM 26 Operation Manual rev 1.2.3...
  • Page 42 To recall an existing Frame Preset, use the rotary encoder to select the required Preset then press the RECALL button to overwrite the current configuration. Frame Presets must initially be created in the Lake Controller, and stored as a Preset using the Lake Controller or Lake Preset Manager.

  • Page 43: Back Panel Interface

    OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT Figure 7-2: Analog Output XLR Connections 7.1.2 Analog Input XLR Connections Two electronically-balanced analog inputs are provided via latching XLR3F connections. INPUT INPUT Figure 7-3: Analog Input XLR Connections LM 26 Operation Manual rev 1.2.3...
  • Page 44 The method shown in Figure 7-5 uses twin-and-screen (balanced) cable and standard XLR pin connections at the LM 26 end, with the cold wire and the cable screen connected to the signal ground of the equipment at the source end.

  • Page 45: Aes3 Digital I/O

    7.2.1 AES3 DB25 Connector A DB25 connector, following the Yamaha pin-out standard, is provided for AES3 connectivity on the LM 26. Figure 7-7: AES3 DB25 Connector and Pinout Reference This single DB25 connection provides four channels of AES3 input and eight channels of AES3 output as shown in Figure 7-4 on page 38 below.

  • Page 46: Rj45 Ethercon Network Connections

    Figure 7-4 on page 38 shows the only possible method of wiring; there is no equivalent of an unbalanced connection in the digital domain. RJ45 etherCON Network Connections Two RJ45 etherCON style network connections are provided as shown in Figure 7-9. LM 26 Operation Manual rev 1.2.3...
  • Page 47 Data activity on the network is indicated by illumination of the green ACT LED. It is normal for the ACT LED to flicker either sporadically or continuously. 7.3.1 Primary Network Connection The Primary Network connection is used for Lake Controller connectivity and Dante digital audio. Please refer to section 4.2 for additional information. LM 26 Operation Manual rev 1.2.3...

  • Page 48: Gpio Connection

    Table 7-3: GPIO Pinout Wiring Reference GPIO configuration is available via the LM 26 front panel interface or via the Lake Controller software. Please refer to section 6.10.4.4 of this manual for additional information on adjustment via the front panel, and refer to the Lake Controller Operation Manual for information on adjusting via software interface.

  • Page 49: Universal Power Supply Connection

    IEC Power Connector A universal power supply capable of accepting 70-265 V ~ 50-60 Hz : 30 W is built into the LM 26. The IEC power cable provided includes a locking feature via a pin on the bottom of the connector; the connector can accept standard or locking IEC power cables.

  • Page 50: Appendix

    The LM 26 is no longer able to communicate with the Lake Control- CTRL OFFLINE Warning ler. Check network connectivity. Frame Fault: Fan There is a problem with the fan on the LM 26. To avoid overheat- FAN FAULT Fault error ing, identify and fix the problem immediately.

  • Page 51: Maintenance

    AES2 (Ch.4) as Priority 1, Analog 2 as Priority 4 Router 5: AES1 (Ch.1) as Priority 1, Analog 1 as Priority 4 Router 6: AES2 (Ch.1) as Priority 1, Analog 2 as Priority 4 LM 26 Operation Manual rev 1.2.3...

  • Page 52: Glossary Of Terms, Acronyms And Abbreviations

    (nearly as good, without full electrical isolation, but a great deal cheaper). The details of any fault or warning conditions which arise in the device during operation are recorded in a data file created by the Lake Event Log Controller software called the Event Log.
  • Page 53 Term Description Frame Presets are a class of Presets within the Lake processing system. Up to 100 can be stored in the hardware device, and each holds Frame Preset the complete configuration of all Modules and the Modules’ internal settings.
  • Page 54 The same core Lake Controller data can then be used for a reduced number of Lake devices. A Super Module is a virtual construct that can be realized within the Lake Controller, allowing a set of Modules in different Frames to be Super Module treated as a single Module.

  • Page 55: Application Guide

    Input Mixer gains can remain at 0.00 dB for most configurations; if only one input channel is used per Module, the other can be set to -INF. To adjust, navigate to I/O CONFIG and tap the Input Mixer blocks for the Module in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details.

  • Page 56: Gain / Level Optimization

    1. Factory Gain is set by the system designer and can be hidden within the Module file. The Factory Gain parameter is only accessible when the Module is unlocked and the Lake Controller is in Designer Mode. Adjust via MODULES > LEVELS > METER OPTIONS > ADJUST FACTORY.
  • Page 57 Distribution amplifiers that offer re-clocking often make the feature optional as using re-clocking can intro- duce small additional amounts of latency, so should not be used unless necessary. LM 26 Operation Manual rev 1.2.3...

  • Page 58: Digital Clock Configuration

    9.4.1 Digital Clock Overview In order to provide a flexible and robust audio processing system, the LM 26 is equipped with a configurable digital clocking system. There are two separate digital clocks which can generate various independent internal sample rates, or can sync to an incoming AES3 signal. Figure 9-1 shows the various sample rates and options available.
  • Page 59 Application Guide In Figure 9-1, each circled C represents a choice point. A choice point is a user‐interface control that can be configured using the Lake Controller software. Please refer to the Lake Controller Operation Manual for further information. Figure 9-1 indicates internally generated clocks with base-rate multiples of 44.1 kHz or 48 kHz.

  • Page 60: Signal Processing Latency

    Clock. The front panel I/O Status View indicates if that device is selected as Dante Clock Master. Confirmation of Dante Master / Slave status is also displayed in the Lake Controller. For further information on Digital Clock configura- tion and the Lake Controller user interface, please refer to the Lake Controller Operation Manual.

  • Page 61: Technical Specifications

    W: 483 mm (19”), H: 44 mm (1 U), Overall D: 290 mm (11.5”) Weight 5 kg (11 lbs.) Finish Black painted steel chassis with aluminum handles Approvals CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC Specifications subject to change without notice LM 26 Operation Manual rev 1.2.3...

  • Page 62: Warranty And Support

    Lake dealer. If the product fails to perform as specified during the warranty period, Lake will undertake to repair, or at its option, replace this product at no charge to its owner, provided the unit is returned undamaged, shipping prepaid, to an authorized service facility or to the factory.

  • Page 63: Trademarks

    Warranty and Support 11.3.2 Factory Service In the event a Lake product requires factory service, you may contact Lake’s service department 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 64 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 K E P R O C E S S I N G . C O M U S & C A N A D A C O N T A C T ► I N F O @ T C G - A M E R I C A S . C O M W W W .

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