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Page 11 of 25
Secondary Safeties
It is imperative that all loudspeakers flown in any given environment should be provided with a
second, independent and properly rated safety suspension point in addition to the principle load
bearing means of suspension. Steel wire ropes or steel chains of an approved construction and load
rating only may be used as secondary safeties. Plastic covered steel chains may not be used as
secondary safeties under any circumstances. Also ensure that all local and national laws are
complied with when determining your primary and secondary suspension points.
Safety Inspections
Carefully inspect all flying system components prior to use for defects or signs of damage prior to
installing or mounting your loudspeaker. If any components damaged or you suspect them to be
damaged, DO NOT USE THEM.
Regular scheduled tests – which are much more rigorous than visual inspections – of all rigging
components must also be carried out. Safety legislation, and test/inspection requirements, will vary
from country to country and as such it is the user's responsibility to ensure that local regulations
are adhered to. In most cases, annual independent tests & inspections carried out by a suitably
approved and qualified inspector will be required.
EM Acoustics recommends detailed logbooks be kept of all inspections and load tests to ensure an
accurate record is kept of the testing for each EM Acoustics rigging accessory.
When flying any loudspeaker system, always wear protective headwear, footwear and eye
protection in accordance with local regulations.
Material Damage from Magnetism
Loudspeakers produce a static magnetic field at all times – even when not in use. Certain
devices are susceptible to external magnetism, and as such a safe distance should be
maintained to prevent damage. It is recommended that a safe distance of 0.5m (1.5ft) is
maintained from loudspeakers when stored, transported and in use, from devices such as
computer hard drives, magnetic media, bank cards to remove the risk of corruption. Larger
distances may be required for some older cathode ray tube displays.
EMS-41 User Manual
v1 November 2019
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