User manual ELECTRO-VOICE A15 DATASHEET
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Manual abstract: user guide ELECTRO-VOICE A15DATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] The rigging techniques and practices recommended in this manual are, of necessity, in general terms to accommodate the many variations in loudspeaker arrays and rigging configurations. As such, the user is expressly responsible for the safety of all specific X-ArrayTM loudspeaker-array designs and rigging configurations as implemented in practice. All of the general rigging material contained in this manual is based on the best available engineering information concerning materials and practices, as commonly recognized in the United States, and is believed to be accurate at the time of the original printing. As such, the information may not be directly applicable in other countries. [. . . ] The Xrsl rigging straps allow the top enclosure to hang at 0° (parallel to the grid) to 10. 8° down relative to the grid in 1. 8° increments. Figure 10a shows the two cutouts in the track on the front of the ATM grid, numbered 0 and 1, and the six cutouts in the enclosure track, numbered 0 through 5. The same equation discussed in the previous paragraph for determining angles between enclosures also applies to the Xrsl when determining angles between the top enclosure and the ATM grid:
X-ArrayTM Loudspeaker Systems
Angle = 7. 2°- (Holes Showing) x 1. 8°for the Xrss where negative ("-") angles indicate downward angles and positive ("+") angles indicate upward angles. For example, if the fittings of the short Xrss straps are inserted into track cutout #2 on both the upper and lower enclosures (position "2-2"), as shown in Figure 11b, the resulting angle between the enclosures is 7. 2° - (4 x 1. 8°) = 0° with a total of 4 holes showing. If the fittings of the Xrss short straps are inserted into track cutout #4 on both the upper and lower enclosures (position "4-4"), as shown in Figure 11c, the resulting angle between the two enclosures with 8 holes showing is 7. 2° - (8 x 1. 8°) = -7. 2°. Using the Xrss at the Grid: The short Xrss rigging straps are the primarily recommendation for use with the ATM grid because they offer the ability to angle the top enclosure both upward and downward relative to the grid. The short Xrss rigging straps allow the top enclosure a range of angles relative to the grid from 7. 2° up to 3. 6° down in 1. 8° increments. The same equation discussed in the previous paragraph for determining Angle = - (Holes Showing) x 1. 8° for the Xrsl where negative ("-") angles indicate downward angles and positive ("+") angles indicate upward angles. For example, when the fittings of the Xrsl straps are inserted into cutout #0 on the grid and cutout #0 on the top enclosure (position "0-0"), as shown in Figure 10b, no holes are showing and the angle of the top enclosure relative to the grid is -(0 x 1. 8°) = 0°. If cutout #0 on the grid and #3 on the enclosure are chosen (position "1-3"), as shown in Figure 10c, a total of 3 holes are showing, making the angle of the top enclosure relative to the grid -(3 x 1. 8°) = -5. 4°. Using the Xrss (short wire-rope rigging strap) Between Enclosures: The short Xrss rigging straps may also be used between enclosures; however, the Xrss offers a lesser range of downward angles than the long Xrsl rigging strap. The center of gravity of array columns, such as the one shown in Figure 14a, in which there are no enclosures angled upward and there are no pull ups, is located towards the rear of the column. The weight distribution of these types of arrays is always towards the rear of the enclosures throughout the column, resulting in the majority of the load being supported by the stronger rigging hinges than the less-strong rigging straps. In these cases, the user need not have any concern for the weight distribution other than to balance a grid. The center of gravity for array columns, such as the one shown in Figure 14b, in which the top two enclosures are angled upward, is located more towards the front for the top enclosure. This shifts much of the load from the stronger rear hinges to the less-strong rigging straps. In these cases the user must be concerned about the weight distribution front to back to ensure that too much load is not applied to the front straps. As mention before, the user need only be concerned if the total weight of a column of loudspeakers is greater than 454 kg (1, 000 lb). Electro-Voice recommends that no more than the top two X-ArrayTM enclosures in a column be angled upwards, and that the upward angle is no greater than 15° to ensure that a safety factor of 8:1 is maintained in the front rigging straps. The reader should note that the rating examples given above are valid for when the rigging hinges and straps are loaded at nearly 0° vertically. The reader is cautioned that the strength ratings of the rigging hardware varies with angle, and should consult section 3. Rigging-Strength Ratings, Safety Factors and Special Considerations for a
easily set by coupling the grids together. [. . . ] SERVICING THE X-ARRAYTM RIGGING The following service items are available for servicing the X-ArrayTM loudspeaker rigging: Enclosure Rigging Hardware: The rigging hardware should not require service by the user. Enclosure Alignment-Foot Replacement: Each foot is installed with four wood screws. If a screw hole strips out during installation, rotate the foot and reinstall the screws. The following service parts are available: Male Alignment Feet: Female Alignment Feet: 28333 28334
Alignment-Foot Screw: 63088-CP Electro-Voice, 600 Cecil St. , Buchanan, MI 49107 USA, 616-695-6831 Rigging Hinge Service: The hinge knob/lockingpin assembly on the Xrhl, Xrhg or Xrhp may be repaired with the hinge knob/locking-pin repair kit. [. . . ]
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