JBL MP418SP - Manual (Page 3)

BEFORE YOU BEGIN
The MP RO speakers covered by this manual are designed for portable applications in which the speakers will be
stacked directly on the floor, stage, a solid, stable platform, mounted on a tripod stand or pole mount. JBL
Professional does not support suspension of the MP
RO models covered by this manual nor are these models
intended for fixed installation in outdoor or high moisture environments. Moisture can damage the speaker cone
and surround and cause corrosion of electrical contacts. 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.
MP RO 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.
Some MP RO speaker models include a 35 mm receptacle cup to allow mounting on tripod stands. When using
stands, be sure to observe the following precautions:
•
Check the stand specification to be certain it is designed to support the weight of the speaker.
Observe all safety precautions specified by the stand manufacturer.
• Always verify that the stand 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 over them pulling the speaker over.
•
Do not attempt to place more than one speaker on a stand designed for a single speaker.
• 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.
•
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.
Hearing damage, prolonged exposure to excessive SPL
MP RO loudspeakers are easily capable of generating sound pressure levels (SPL) sufficient to cause permanent
hearing damage to performers, production crew and audience members. Caution should be taken to avoid pro-
longed exposure to SPL in excess of 90 dB.
Amplifier Module Precautions
Do not attempt to service this unit beyond instructions contained in this manual. Refer all servicing to a JBL Professional
Authorized Service Center. Servicing is required when the apparatus has been damaged in any way, such as power-
supply input connector is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate normally, or has been dropped.
Keep your MP418SP amplifier module away from sources of heat, such as a radiator or oven. Do not cover or surround
your MP418SP amplifier module with material that may retain heat, such as a blanket or curtain. Be certain that the
vents on the panel of the amplifier module are clear of all obstructions during operation.
WARNING - Shock hazard: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. Do not
immerse your MP418SP amplifier module in any liquid. Do not operate your MP418SP near a pool, bathtub or other
standing water. Do not bypass or defeat the grounding or polarization means used on the MP418SP amplifier module.
Make sure all blades on the polarized power plug can be fully inserted into the receptacle or other outlet that will be
used with the unit. Your MP418SP amplifier module should be cleaned only with a dry cloth. Take care of the power cord
attached to your MP418SP amplifier module. Avoid situations where your cord might be stretched, pinched, or otherwise
abused. Route it to avoid foot traffic. Pay special attention to the cord connector and attachment points.
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