User manual ELECTRO-VOICE X-LINE FLYER

[. . . ] 4 1. 2 Enclosure Rigging Hardware Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1. 3 Rear Rigging Hinge Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1. 4 Front Rigging Strap Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. 5 Xvbp Pull-Up Bar Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Vertical line arrays typically consist of several Xvls 90°H x 5°V systems at the top, followed by several Xvlt 120°H x 8. 5°V systems below. The exact number of Xvls and Xvlt loudspeaker systems in a column will vary depending on the vertical acoustic coverage required for the specific venue. Furthermore, the relative vertical angles between the boxes will also depend on the venue acoustic coverage requirements. When acoustic coverage is required immediately below the array, a single Xfil1 or Xfil2 downfill enclosure can be added at the very bottom of the array. (Acoustic design techniques are outside the scope of this document and the reader is directed to the X-Line modeling software available from the Electro-Voice website for acoustic design assistance. ) It is also possible to construct subwoofer line arrays using the Xsub systems. From Figure 2, the reader will note that X-Line full-range systems are not symmetrical left to right. When constructing a line-array column, it is essential that all Xvls, Xvlt, Xfil1 and Xfil2 enclosures are hung so that the high-frequency sections are all in a vertical straight line. In a stereo sound reinforcement application, the best results are achieved when the boxes in the left and right arrays are oriented so that the high-frequency sections are onstage (i. e. , together towards the middle of the venue), making the left and right arrays a perfect mirror image. This requires that the Xvls and Xvlt loudspeaker systems on the house-right side be turned upside down. The grilles on the Xvls and Xvlt boxes on the house-right side array should be rotated so a consistent appearance is maintained between the left and right sides. Because the downfill boxes cannot be turned upside down, the Xfil1 and Xfil2 loudspeaker systems have been designed as a mirror image pair. Rectangular Box (Xvls or Xsub) to Trapezoidal Box (Xvlt) Angle Between Boxes 2. 5° 3. 0° 4. 0° 4. 5° 5. 0° 6. 0° 6. 5° 7. 0° 8. 0° 8. 5° Front Chain Configuration A-B B-B A-A A-B B-B A-A A-B B-B A-A A-B Holes Showing In Front Rigging 0 0 1 1 1 2 2 2 3 3 Angle Between Boxes 5. 0° 6. 0° 6. 5° 7. 0° 8. 0° 8. 5° 9. 0° 10. 0° 10. 5° Trapezoidal Box (Xvlt) to Trapezoidal Box (Xvlt) Front Chain Configuration B-B A-A A-B B-B A-A A-B B-B A- A A-B Holes Showing In Front Rigging 0 0 0 1 1 1 2 2 2 Note: Accoustic gaps will occur with angles greater than 5. 0° between Xvls systems. Figure 8: Enclosure Vertical Angle Adjustments ELECTRO-VOICE® X-Line TM Rigging Manual 20 In this document and in the software modeling program, the front rigging fitting attachment locations are denoted by the number of holes showing in the rigging track once a rigging strap is installed. On each side of the enclosures at the front, there is a pin in the middle of the rigging track that is used to secure the Front Dollies to the enclosures. When two enclosures are linked together so that they are tight packed with the sides of the enclosures parallel, the rigging fittings are installed near the middle of the rigging track in the last available rigging cutout next to the dolly pins. In this case, there are no cutouts in the rigging track visible because the rigging fittings and the chain cover up all of the track cutouts. Hence, this position is referred to a No Holes Showing. For example, when two rectangular Xvls enclosures are linked together using an Xvsl linking strap, and a relative angle of 0° is required between the boxes (i. e. , the boxes are tight packed with both facing straight ahead), the rigging fittings of the Xvsl linking straps are installed in the middle next to the dolly pins for No Holes Showing. If a relative angle of 2° is required between the two Xvls boxes, then one of the rigging fittings must be moved one cutout in the track, leaving One Hole Showing. If a relative angle of 4° is required, then one of the rigging fittings must be moved two cutouts in the track, leaving Two Holes Showing. To get the correct angle between two boxes, it does not matter on which box the holes are showing. It is even possible to achieve the correct angle with holes showing on both boxes. However, there is an advantage in always having the holes showing on the bottom box only. When standing on the ground looking up at an array, the holes showing on the bottom box are always visible. [. . . ] Broken welds, corrosion, missing or damaged components that could reduce the hoist strength. Never exceed the limitations or maximum recommended load specified by the hoist manufacturer. Always follow manufacturers recommendations for operation, inspection, and certification. Always raise and lower the load slowly and evenly, avoiding any rapid changes in speed or shifting loads that could result in a sudden jolt to the suspended system. 39 ELECTRO-VOICE® X-Line TM Rigging Manual Building, Tower or Scaffold Supports: Prior to each use, the strength and load-bearing capabilities of the building, tower or scaffold structural supports should be evaluated and certified by a professional engineer as being adequate for supporting the intended rigging system (including the loudspeakers, grids, chain hoists and all associated hardware). [. . . ]