Alcons LR28 User Manual
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Alcons LR28 User Manual

Larger format line array system
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Summary of Contents for Alcons LR28

  • Page 2: Table Of Contents

    Cabinet connections ____________________________________________________________________________________ 10 GRD28 options ________________________________________________________________________________ 11 GRD28 hoist options Fly mode array assembling and hoisting _________________________________________________________________________________ Compression style array assembling and hoisting _________________________________________________________________________ Service and support ______________________________________________________________________________ 18 CE declaration of conformity _______________________________________________________________________ 20 Rigging manual LR28 Rev. 1.4...

  • Page 3: Introduction

    The trapezoidal cabinet is fitted with integrated mounting hardware, enabling angle-setting on the cabinets, without lifting the array, resulting in safer and faster set-up with minimal handling. The rigging system supports different modes of array assembling and has a working load limit of 24x LR28 or 32x LB28 cabinets under 10:1 safety.

  • Page 4: Important Safety Instructions And Precautions

    Do not stack the loudspeaker array on unstable ground or surface. If the array is stacked on a structure, platform, or stage, always check that the latter can support the total weight of the array. As a general rule, Alcons Audio recommends the use of safety straps at all times.

  • Page 5: Installation

    Unpacking Carefully open the shipping carton and inspect all the parts. Every Alcons product is thoroughly tested and inspected before leaving the factory and should arrive in perfect condition. If you find any damage, notify the shipping company immediately. Only you, the consignee, may initiate a claim for shipping damage. Be sure to save all packing materials for the carrier’s inspection.

  • Page 6: Rigging Components

    4) Pin pre-rig transport Pin holding the cabinet at 0° on the PRRGL28 5) Signal input/ link Input/ link for the audio signal 6) Angle frame This frame holds features for the angle setting and back coupling 7) Pin slider Black color indicates LR28/80°, green LR28/110° Rigging manual LR28 Rev. 1.4...
  • Page 7 It has a mounting position and through hole for the Teqsas laser/ inclinometer. It has a WLL of 24x LR28, or 32x LB28 cabinets. all points measure 20mm/0.8-in. It is recommended to use 3,25T shackles in any situation and always use two...
  • Page 8 WLDL28 Wheel dolly is used as a single cabinet transport option. Together with the WHFRML28, for the optional caterpillar style hoisting. The SFTCVRLR28 soft cover is available for the LR28 single transport option. Rigging manual LR28 Rev. 1.4...

  • Page 9: Array Configurations

    The angle lay-out is pictured below. The “P” indicates the position of the angle pin, when parking the angle arm. This is done in case of single LR28 cabinet transportation. The general rigging guidelines on the right is also shown at the back of the cabinet.

  • Page 10: Grd28 Options

    Use 3,25T shackles in any situation. The A1 & A6/ A7 marked points are the default hoist points. It is also possible to use one pick point from the A5 pattern. Use it only for max. 12x LR28 cabinets.

  • Page 11: Grd28 Hoist Options

    The schematic picture below shows the possible array hang options A-D in fly mode and stack arrangement E&F As stated earlier, the array angles can be determined through the Alcons Ribbon Calculator™ simulation program. The Centre of Gravity needs to be between the outermost pickpoints at all times! When stacking (E&F), ensure that the centre of gravity is well within the PRRGL28/ GRD28 support points.

  • Page 12: Fly Mode Array Assembling And Hoisting

    Fly mode array assembling and hoisting Using this mode the LR28 rigging system uses the vertical PRRGL28 pre-rig transporter combined with (non-compression) vertical fly array hanging. This mode uses the top “fly slot” in the angle arm and is best suitable for large 12->24 pcs arrays The schematic drawing shows the building steps G->L with 2 chain hoists.
  • Page 13 This flying option uses the PRRGL28 pre-rig transport option. The PRRGL28 (E) transports 4x LR28 or LB28 cabinets in a vertical position. Take off the protective SFTCVR4LR28 Start with the first 4 cabinets. (G). This is a two man job Hold each cabinet and remove the angle pin (6) and red buttoned pin (12).

  • Page 14: Compression Style Array Assembling And Hoisting

    Use an extra safety chain in combination with the lever hoist. It is not allowed to use a motor hoist. Take the PRRGL28 (E) off when the first 4 piece LR28 array is suspended. This is a two man job.
  • Page 15 After the compression stage, the angle of the entire array can now be adjusted. Use an angle inclinometer on the GRD28. The following schematic drawing shows the three hoisting stages with a 4 pcs array. 1) After array building 2) Compression to reach the desired angles 3) Array angling Rigging manual LR28 Rev. 1.4...
  • Page 16 5 (pattern A5) in the centre of gravity. The second hoist chain has to be attached to the WLFRML28 (C). In this way, the angles can be set using compression and the entire array can be angled. 4) After array building 5) Compression to reach the desired angles 6) Array angling Rigging manual LR28 Rev. 1.4...
  • Page 17 Put the red buttoned pins (12) into the angle arms of the first 4 piece array. Land the PRRGL28 and detach the (front and back) cabinet connection pins above the top no. 4 cabinet on the PRRGL28 and put them into their transport recesses . Continue this procedure. Use the optional SFTCVR4LR28 to protect the PRRGL28 for transport and storage. Rigging manual LR28 Rev. 1.4...

  • Page 18: Service And Support

    Summary Alcons Audio BV warrants the original purchaser and any subsequent owner of each new Alcons product, for a period of six years limited from the date of the original purchase by the original purchaser that the new Alcons product is free of defects in materials and workmanship. Alcons Audio BV warrants the new Alcons product regardless of the reason for failure, except as excluded in this warranty.
  • Page 19 6. Service and support ___________________________________________ Contact information Mailing address: Alcons Audio BV De Corantijn 69 1689 AN ZWAAG The Netherlands Telephone +31 (0)229 283090 World Wide Web: http://www.alconsaudio.com E-mail: info@alconsaudio.com Rigging manual LR28 Rev. 1.4...

  • Page 20: Ce Declaration Of Conformity

    National standards and technical specifications applied: DIN EN ISO 12 100, DIN EN 1050, BGV C1 provided the mounting components are unaltered/modified and in “factory-original” condition. Established at Zwaag, the Netherlands, June 1th, 2015 T.H. Back Managing Director Rigging manual LR28 Rev. 1.4...
  • Page 21 Notes _________________________________________________________ Rigging manual LR28 Rev. 1.4...

This manual is also suitable for:

Lb28

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