EM Acoustics EMS-81 compact passive loudspeaker - Manual (Page 14)

14
EMS Series User Manual
www.emacoustics.co.uk
EMS-152 Rigging Options
There are several different options for suspending an EMS-152 enclosure, detailed below.
Suspension using forged shoulder eyebolts
The EMS-152 can be simply suspended for more permanent applications using a pair of M10 forged shoulder
eyebolts with a 20mm thread length. Simply screw the eyebolts into the two M10 mounting points on the top (or
bottom if flying upside down) of the enclosure. These can then be attached to steel cables or chains to suspend
the enclosure. For setting down or up-tilt angle, insert an M10 eyebolt into one of the rear M10 points and attach
an additional cable or chain – alternatively vary the front or rear chain length on the main points to adjust the
suspension angle.
Attachment of the VFA-152 Variable angle suspension bracket
The VFA-152 is intended to provide an in-place solution for varying the down or up-tilt angle of the enclosure.
Using the two M10 socket head bolts (supplied with the VFA-152), bolt the enclosure to the VFA-152 using points
marked “A”. The quick-lock clamp on top of the VFA-152 (marked “B” in Fig 1) can be used either to attach
directly to a suspension point, or else where the desired height of the enclosure is lower than the suspension point
(for example in proscenium arch theatre use), suspend a small length of scaffolding bar using traditional wires or
chains and then attach the VFA-152 to this. A secondary safety cable or chain should be attached to the eyebolt
on the VFA-152 (marked “C” in Fig 1). By adjusting the knob at the rear of the VFA-152 using a 19mm socket
(point “D” on Fig 1), the hanging point can be moved. This adjustment moves the suspension fulcrum relative to
the enclosure’s centre of gravity, and hence will adjust the suspension angle.