JBL Comprehensive Guide on VRX Suspension and Ground Stacking Techniques

Suspension in Permanent Installations

For permanent installation applications a VRX array may be suspended using M10 eyebolts. Only load-rated, forged shoulder eyebolts are to be used. A kit consisting of three (3) forged shoulder eyebolts

is available from JBL Professional as part number 229-00009-01. Suspension of the VRX array must employ both top attachment points. The VRX918S and VRX915S subwoofers must always be at the top of the array.

Eyebolt Suspension

The following table defines the maximum number of speakers that may be suspended using the two M10 eyebolt attachment points provided on the cabinets. A minimum design factor of 7:1 is maintained for all speak- er configurations at or below those indicated in the table.

Maximum number of VRX918S in array	5	4	3	2	1	0
Maximum number of VRX932LA in array	0	2	4	5	6	6
Maximum number of VRX915S in array	4	3	2	2	2	0
Maximum number of VRX928LA in array	0	2	3	4	5	6
Eyebolt Suspension		Array Frame Suspension

Ground-Stacked, Upward Firing Arrays

Applications such as covering stadium bleachers from the playing field may be addressed by installing the VRX932LA-AF/VRX-AF/VRX-SMAF array frame to the bottom of the array.

Up to four VRX932LA/VRX928LA loudspeakers may be locked together and ground stacked using the VRX array frame kit, as shown.

[Warning: Do not ground stack more than four VRX932LA/VRX928LA loudspeakers in one array].

When ground stacking VRX900LA loudspeakers, use the VRX932LA-AF/VRX-AF/VRX-SMAF array frame as the base (as shown) by attaching the loose drop levers, included in the array frame kit, to the lower rigging bar on the VRX900LA loudspeaker. When stacking the loudspeakers together, make sure each loudspeaker is locked together. Be certain that the surface on which the system is to be stacked is flat, stable and solid.

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