Safety First; Rigging And Suspension; Amplification - Martin Audio EM186 User Manual

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CONTENTS
4
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 EM
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.
4.1
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.
The EM26, EM56 and EM76 are provided with rear panel fixings for wall
brackets. The EM26, EM56, EM76 and EM186 are also fitted with
threaded inserts to allow the suspension of a single enclosure.
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. Eye bolts are
strongest along the thread axis. Angling the enclosures will result in an
angle pull and it is important to use eye bolts that are safe in these
circumstances. Only forged shoulder eye bolts should be considered and it
is important that the thread length is at least 30mm. A flat washer should
be inserted between the eyebolt and the enclosure. Formed eye bolts i.e.
those which are formed from a steel rod bent into an eye should be
avoided.
5
EM Series loudspeakers are designed to be used with professional power
amplifiers capable of producing the following power outputs into 4 ohms:
EM26
EM56
EM76
EM186 400-550W
EM201 550-700W
EM251 550-700W
Care should be taken to avoid amplifier clipping. It is important to
understand that a low power amplifier driven into clipping is more likely to
damage a loudspeaker than a higher power amplifier used within its ratings.
This is because music signals have a high peak-to-average "crest" factor.
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SAFETY FIRST

Rigging and Suspension

AMPLIFICATION

300-400W
300-400W
400-550W
Martin Audio – EM SERIES
4
GUIDES