Safety First; Stacking; Rigging And Suspension - Martin Audio THV User Manual

TH Series
Safety first
It is important that loudspeaker systems are used in a safe manner. Please take some time to review the following points
concerning safe use of TH Series loudspeakers.
Professional loudspeakers are capable of producing extremely high sound levels and should be used with care. Hearing loss is
cumulative and can result from levels above 90dB if people are exposed for a long period. Never stand close to loudspeakers
driven at high level.
Stacking

Ensure that the floor or stage is level and solid

Do not stack speakers too high outdoors where winds could topple the stack

Be aware that speakers producing very high power levels can move or creep. To avoid this, place friction material
between the floor and speaker and between each speaker or use strapping to secure the stack.
Rigging and suspension
WARNING: Suspending the system should only be done by qualified personnel following safe rigging practices. Secure fixings to
the building structure are vital. Seek help from architects, structural engineers or other specialists if in any doubt.
TH Series enclosures are designed for portable applications, but can be suspended singly by means of the threaded inserts
provided. Enclosures are fitted internally with steel corner reinforcement brackets, where necessary, to ensure that each cabinet
is strong enough to be hung from its top.

Never suspend one enclosure from another to form an array or cluster using these fittings

The common practice of using commercially available eye bolts for suspension should only be undertaken with great
caution.

Only forged or machined shoulder eye bolts should be considered and it is important that the thread length is at least
30mm

Formed eye bolts i.e. those which are formed from a steel rod bent into an eye are not recommended

Eye bolts are strongest along the thread axis. Angling the enclosure will result in an angle pull and it is important to use
eye bolts that are safe in these circumstances.
TH Series User Guide V1.0
USER GUIDE
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