Precautions; Suspension Of Loudspeaker Systems - JBL PRX500 User Manual

The PRX500 series speakers covered by this manual are not intended for use in high moisture
environments. Moisture can damage the speaker cone and surround and cause corrosion of
electrical contacts and metal parts. Avoid exposing the speakers to direct moisture. Keep
speakers out of extended or intense direct sunlight. The driver suspension will prematurely dry
out and finished surfaces may be degraded by long-term exposure to intense ultra-violet (UV)
light. PRX500 series speakers can generate considerable energy. When placed on a slippery
surface such as polished wood or linoleum, the speaker may move due to its acoustical energy output.
Precautions should be taken to assure that the speaker does not fall off a stage or table on
which it is placed.
Stand Mounting Safety Precautions
Some PRX500 series models include a 36 mm receptacle cup to allow mounting on tripod stands or on a pole
over subwoofers. When using stands or poles, be sure to observe the following precautions:
• Check the stand or pole specification to be certain the device is designed to support the weight of the
speaker. Observe all safety precautions specified by the manufacturer.
• Always verify that the stand (or subwoofer/pole) is placed on a flat, level and stable surface and be
sure to fully extend the legs of tripod type stands. Position the stand so that the legs do not present a
trip hazard.
• Route cables so that performers, production crew, and audience will not trip and topple the speakers over.
• Inspect the stand (or pole and associated hardware) before each use and do not use equipment with
worn, damaged or missing parts.
• Do not attempt to place more than one PRX500 series speaker on a stand or pole.
• Always be cautious in windy, outdoor conditions. It may be necessary to place additional weight (i.e.
sandbags) on the base of the stand to improve stability. Avoid attaching banners or similar items to any
part of a speaker system. Such attachments could act as a sail and topple the system.
• Unless you are confident that you can handle the weight of the speaker, ask another person to help
you get it onto the tripod stand or pole.
Suspension of Loudspeaker System
Before attempting to suspend your JBL loudspeakers, read and understand the following safety information.
IMPORTANT SAFETY WARNING!
The information in this section has been assembled from recognized engineering data and is intended for
informational purposes only. None of the information in this section should be used without first obtaining
competent advice with respect to applicability to a given circumstance. None of the information presented herein
is intended as a representation or warranty on the part of JBL. Anyone making use of this information assumes
all liability arising from such use.
All information presented herein is based upon materials and practices common to North America and may
not directly apply to other countries because of differing material dimensions, specifications, and/or local
regulations. Users in other countries should consult with appropriate engineering and regulatory authorities
for specific guidelines.
Correct use of all rigging hardware is required for secure system suspension. Careful calculations should always
be performed to ensure that all components are used within their working load limits before the array is
suspended. Never exceed the maximum recommended load ratings.
Before suspending any speaker system always inspect all components (enclosure, rigging frames, pins,
eyebolts, track fittings, etc.) for cracks, deformations, corrosion, missing, loose or damaged parts that could
reduce strength and safety of the array. Do not suspend the speaker until the proper corrective action has been
taken. Use only load-rated hardware when suspending JBL suspendable loudspeaker models.

PRECAUTIONS

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