PRESONUS ULT-series Owner's Manual page 27

4 Loudspeaker Placement and System Configuration
4.1 Recognizing Problem Rooms
4.3.3 Precautions
The ULT18 requires a minimum of four suspension points to be used.
Again, select the strongest overhead structure available. The ULT18
can be flown using the four M10 point on the top or the side.
SUPPORTED: Four Rigging Points
PreSonus offers an M10 Kit that includes four (4) forged-shoulder steel
M10 eyebolts. This kit is to be used with the ULT12, ULT15, and ULT18 M10
suspension points. These bolts are specifically designed for safe suspension
of PreSonus ULT-series Loudspeakers and must not be substituted. These
eyebolts are not a common hardware store item. Please read all included
information. A minimum of three (3) eyebolts per per full-range cabinet and
four (4) eyebolts per ULT18 Subwoofer must be used for safe suspension.
When using the M10-AI Kit, please remember that the eyebolt strength
rating will vary with the pull angle. It is extremely important to observe
appropriate pull angles when suspending any loudspeaker with eyebolts.
Suspending an object with eyebolt should always be done in a way that
ensures the resultant forces are within the allowed pull angles.
Do not use at
45° or less
ULT-series loudspeakers, like all electrical devices, must be protected from
liquids or excessive moisture. They are not designed for outdoor use during
inclement weather. If you are using your ULT-series loudspeakers outside
when rain or other moisture-laden weather occurs, immediately power down
your loudspeakers and protect the cabinets with waterproof coverings.
The amplifiers in ULT-series loudspeakers are convection cooled via
the rear-panel heatsink. Free airflow must be maintained around and
behind the heatsink, with a minimum clearance of six inches behind
the cabinet. Make certain the heatsink is kept clear of any adjacent
materials, such as stage curtains, that could impede airflow.
ULT-series
Owner's Manual
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