Advertisement
Array Rigging
pro.Bose.com
Application of the RMPULL Bracket
There are three primary applications of the RMPULL bracket for use with RoomMatch™ arrays:
1) For use as "mini frame" to suspend 1 or 2 full-range modules
2) For use with either Small Array Frame or Large Array Frame for pitch angle adjustment
3) For use with Large Array Frame to reduce module moment-force loads
The RMPULL bracket may be used as a "mini frame" to suspend 1 or 2 full-range modules, as suspending the modules directly from
the integrated side-plate rigging hardware is not recommended. When used in this application, the range of suspension angles is limited
using 2-point attachment to the building structure. See Figure 11 below. For greater adjustments in suspension angles, an additional
RMPULL bracket may be attached to the bottom module and used as a third-attachment point to the building structure, to allow angle
adjustment. See Figure 12 below. The RMPULL bracket may NOT be used to suspend subwoofer modules.
Figure 11. RMPULL bracket for 2-module Array
Figure 12. RMPULL brackets top and bottom for 2-module Array
Most commonly, the RMPULL bracket is used as a third-attachment point to the building structure, to allow greater pitch angles, or
more precise resolution of the array. The pitch angle adjustment resolution of the Array Frames using 2-point gravity suspension varies
with module configuration. Additionally, the accuracy of the pitch angle prediction using the "RoomMatch Array Frame Suspension
Angle Calculator" software is plus or minus 2 degrees. Therefore, when precise array pitch angles are required (typically for long throw
distances), the use of the RMPULL bracket with a third attachment point is recommend. Attachment of wire rope (or other materials)
directly to the module integrated side-plates for this purpose is not recommended. When using the RMPULL bracket, the pickup point
on the Array Frame should be positioned as close to the array center of gravity (COG) as possible. This will reduce the load force on the
RMPULL bracket. Additionally, the distance between the RMPULL bracket attachment and array center of gravity (distance "Y" in Figure
13) must be greater than the distance from the frame attachment and center of gravity (distance "X" in Figure 13).
Figure 13. Array Frame, Pullback Bracket, and Array Center of Gravity
Installation and Safety Guidelines
Page 15
Advertisement
