Alcons LR24 Manuel utilisateur

user’s manual

LR24

mid-size line-array module

evolutionary audio solutions™

Rigging manual LR24 Rev. 1.1 2

Table of contents _______________________________________________

1 Introduction______________________________________________________________________________________3

2 Important safety instructions and precautions _________________________________________________________4

3 Installation_______________________________________________________________________________________5

4 Rigging components ______________________________________________________________________________6

5 Array configurations _____________________________________________________________________________10

6 Service and support______________________________________________________________________________ 21

7 CE declaration of conformity_______________________________________________________________________23

Rigging manual LR24 Rev. 1.1 3

1. Introduction__________________________________________________

Dear customer,

Congratulations on your purchase of an Alcons Audio LR24 line array loudspeaker and thank you for your confidence in Alcons products. We are very honoured

to welcome you to the growing family of Alcons ambassadors!

For your safety, please read the Important safety instructions and the precautions section before rigging a loudspeaker array.

General features

The LR24 has the following features:

12” pro-ribbon HF section with exceptional intelligibility and “throw”.

Non-compressed 1:1 HiFi-quality sound reproduction.

Maximum dynamic headroom reserve with up to 90% less distortion.

Intuitive predictable linear response behavior and identical tonal balance at any SPL.

A unique seamless arrayability up to/beyond 20kHz.

Fully coherent and symmetric pattern control in horizontal and vertical plane.

SIS™ Pre-wired for very high system damping and further reduced distortion.

All Neodymium drivers for excellent performance-to-weight ratio.

LR24 rigging features

The rigging system enables angle-setting on the cabinets without lifting the array, resulting in safer and faster set-up with minimal handling. The unique, patent-

pending flying system facilitates both compressed and non-compressed suspension. It has a WLL of 24 cabinets under 10:1 safety.

Manual

This manual is written in a compact and easy readable way. You can contact Alcons Audio for more in-depth information on different items or situations

Rigging manual LR24 Rev. 1.1 4

2. Important safety instructions and precautions _____________________

Read this manual

1. Follow all safety instructions as well as the warning messages.

2. Never incorporate equipment or accessories not approved by Alcons Audio.

3. Read all the related product information before using the system.

4. Work with qualified personnel for rigging the system.

5. Installation should only be carried out by qualified personnel who are familiar with the rigging techniques and safety recommendations stated in this

manual.

6. Ensure health and safety during installation and setup.

7. All persons must wear protective headgear and footwear at all times. Under no circumstances personnel is allowed to climb into a loudspeaker assembly.

8. Respect the Working Load Limit (WLL) of third party equipment.

9. Alcons Audio is not responsible for any rigging equipment and accessories provided by third party manufacturers. Verify that the Working Load Limit

(WLL) of the suspension points, chain hoists and all additional hardware rigging accessories is respected.

10. Respect the maximum configurations and the recommended safety level.

11. For safety issue, respect the maximum configurations outlined in this manual. To check the conformity of any configuration in regards with the safety level

recommended by Alcons Audio.

12. Be cautious when flying a loudspeaker array. Always verify that no one is standing underneath the loudspeaker array when it is being raised or lowered.

As the array is being raised, check each individual element to make sure that it is securely fastened to the adjacent element.

13. Never leave the array unattended during the installation process. As a general rule Alcons Audio recommends the use of safety slings at all times.

14. Ensure that the surface is suitable for ground-stacking a loudspeaker array.

15. 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.

16. When a loudspeaker assembly is deployed in an open air environment, wind can produce dynamic stress to the rigging components and suspension

points. If the wind force exceeds 6 Beaufort scale, lower down and/or secure the loudspeaker array.

The exclamation point within a triangle is intended to alert the user to the presence of important operating

instructions in the literature accompanying the product.

Rigging manual LR24 Rev. 1.1 5

3. 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.

Rigging manual LR24 Rev. 1.1 6

4. Rigging components __________________________________________

LR24 loudspeaker

1) LR24 cabinet LR24 cabinet (shown)

2) Front coupler Front couplers, lockable with quick release pin

3) Bar handles Handles in the cabinet ensure easy handling

4) Pin angle setting Pin determines the angle between the cabinets

5) Angle arm + lever Lever to turn the angle arm

6) Signal input/ link Input/ link for the audio signal

7) Angle frame This frame holds features for the angle setting and coupling

8) Connection pin Bottom Pin for connection to a lower cabinet

9) Red 0° pin Pin keeping the cabinets in a 0° position enabling angle setting in compression mode

6 3 3

Rigging manual LR24 Rev. 1.1 7

4. Rigging components __________________________________________

GRD24B

The GRD24B enables the LR24 line-array modules to be flown and

ground stacked. The grid can be suspended from multiple hoist

options on top of the grid or with the central “single pick-point” bar for

smaller arrays (all points 14mm/0.55-in for 1,5T shackles).The

GRD18B has a weight of 35 kg / 77 lb and is certified for a safety-

rating of 10:1, for 24 cabinets LR24

GRD24EXTBR

This is an extension bar, which can be attached on top of the

GRD24B, to extend the leverage capabilities of the GRD24B, with

larger centre-of-gravity (COG) array off-sets.

With the GRD24EXTBR mounted at the front side of the GRD24B,

the upward array tilt is extended; With the GRD24EXTBR mounted

at the rear side of the GRD24B, the downward array tilt is extended.

The front and rear holes measure 20mm/0.8-in to facilitate 3,25T

shackles. Always use both quick release pins for the GRD24B/

GRD24EXTBR connection.

PBFRML24

This frame is used as a pull-back device for compression style flying. The hoist

point measures 20mm/0.8-in for a 3,25T shackle.

Rigging manual LR24 Rev. 1.1 8

4. Rigging components __________________________________________

PRRGL24

The LR24 is transported with 4 units on the PRRGL24 pre-rig dolly frame,

facilitating curved or straight stacks. The dolly frame also enables a ground-stack

configuration. With the optional detachable legs the tilt-angle can be

adjusted.The LR24 is transported with 4 units on the PRRGL24 pre-rig dolly

frame, facilitating curved or straight stacks. The dolly frame also enables a

ground-stack configuration; With the optional detachable legs the tilt-angle can

be adjusted.

STCKFTL24

Optional stack foot, mounted on a PRRGL24 corner

PRRGL24TOP

A detachable plateau can be mounted on top of a curved or straight stack.

This can be used as a flat stowage plateau. The maximum load is 22 kg/ 55 lb

The pre-rig dollies can be placed on top of each other together with the plateaus.

Rigging manual LR24 Rev. 1.1 9

4. Rigging components __________________________________________

Cabinet connections LR24

Array assembling can be done in two ways: Fly mode or Compression mode. This

is determined by the available space, time or available parts.

There are 10 user selectable logarithmic angles, which can be determined by the

Alcons Ribbon Calculator™ simulation program. The angles are suitable for both

Fly and Compression mode array flying.

The angle lay-out is pictured below. The “P” indicates the position of the angle pin,

when parking the angle arm.

The picture on the right shows the

angle frame(7), with the angle

arm(5) in its parking position,

locked by the angle pin (4). It has

two slots for both modes.

The arm is fitted with a tab, to hold

the arm when placing it into

position.

The indication on the corner handle

bar indicates the horizontal

dispersion of the LR24 cabinet; 90°

as shown, or 120°

Rigging manual LR24 Rev. 1.1 10

5. Array configurations___________________________________________

GRD24B options

The GRD24B has multiple mounting options. The picture on the left shows the different pick-points for flying an array. The A1 & A2 marked points are the default

hoist points.