L-Acoustics ARCS, Руководство оператора

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L-ACOUSTICS ARCS Manual V2.0 2/13/2003
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5.2 INSTALLATION OF A DOUBLE ROW FLOWN SYSTEM
Two single row ARCS arrays can be combined into a double row array to increase the output sound
pressure level. Low frequency loudspeakers are coupled by arraying the enclosures bottom-to-
bottom with the connector plates of upper row enclosures oriented upwards (front logo down) and
the connector plates of lower row enclosures oriented downwards (front logo up).
* First assemble and fly the upper row as described previously in Section 5.1
* Position the bottom row of enclosures directly underneath the first row of the array
* Assemble the bottom row of enclosures together using ARCOUPL (do not use the BUMP3 flying
element for the bottom row)
* Lower the top row into position and physically attach the top row to the bottom row using the
ARCSTRAP adapter (front and rear).
* The two rows are now physically attached to each other and the array can be flown.
Alternatively, the double row of ARCS enclosures can be stacked prior to assembly (as shown in the
rigging procedure illustrated below).
Note: For a 2 x 2 element ARCS array, only one BUMP3 is necessary. For a 2 x 3 element ARCS array,
one LIFTBAR should be used along with two BUMP3 (placed between enclosures 1 & 2 and 2 & 3).
For a 2 x 4 element ARCS array, one LIFTBAR should be used along with two BUMP3 placed between
enclosures 1 & 2 and 3 & 4. When more enclosures are to be flown, employ one BUMP3 per four
ARCS enclosures (horizontally or vertically).
(1) ARCS plus accessories for flying a double row of
4+4. Note: logo-to-logo orientation of enclosures.
(2) Rigging accessories (10 ARCOUPL, 2 BUMP3, 1
LIFTBAR, 6 ARCSTRAP plus shackles required)
(3) ARCSTRAP attached between the middle pair
of ARCOUPL (front and rear)
(4) ARCSTRAP secured using a locking nut and bolt
assembly with cotter pin safety