Peavey Impulse 12 D Operating Manual page 21

O P E R A T I N G I N S T R U C T I O N S
CAUTIONS
The unit must be disconnected from the AC power source before any work is done on it. Refer all servicing to
qualified service personnel.
The heat sink on the back plate can become hot to the touch. Do not block or cover the heat sink from
ventilation. There must be a minimum of 4" of space behind the heat sink. Do not allow the airflow to be
become blocked by objects such as curtains or drapes, thermal building insulation, etc. It is recommended that
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the rear of the Impulse 12D not be placed in a closed space or a space that has no fresh, cool airflow.
Be sure to keep the microphone away from the front of the speaker after switching the mic/line sensitivity
switch to the OUT position and while setting the microphone level, or very loud feedback will occur! Damage
to the system is likely if this occurs! DO NOT connect the inputs of the Impulse ® 12D to the output of a power
amplifier. The inputs are meant to be driven from a line-level strength signal.
DO NOT remove the protective metal grille.
WARNING! The Impulse ® 12D is very efficient and powerful! This sound system can permanently damage
hearing! Use extreme care setting the overall maximum volume!
The apparent sound level of the Impulse ® 12D can be deceiving due to its clear, clean sound output. The lack
of distortion or obvious distress can make the sound level seem much lower than it actually is. This system is
capable of SPL in excess of 131 dB at 1 M from the speaker!
FLyING THE IMPULSE 12D
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Caution: The suspension or flying of the Peavey Impulse 12D must be done by a certified structural engineer.
IMPORTANT SAFETy INFORMATION FOR MOUNTING THE PEAVEy IMPULSE 12D SPEAKER SySTEM
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Caution: Before attempting to suspend this model of speaker, consult a certified structural engineer. Speaker
can fall due to improper suspension, resulting in serious injury and property damage. Other enclosures must
not be suspended below this unit, nor should additional weight be suspended from one of these units. Use only
the correct mating hardware. All associated rigging is the responsibility of the customer.
Always use all four inserts of a given group as a set; NEVER use just one insert to fly a cabinet! The four insert
groupings are a top group of four, a bottom group of four, and a side group of four underneath the right side
handle.
Do not use the inserts with eyebolts, even if all four fly points have an eyebolt installed and attached to rigging,
as this still can stress each individual insert beyond its design ratings.
Maximum enclosure angle from vertical hang: 30˚
Whenever possible, in addition to the nominal primary mounting method, use a suitable safety chain or wire
rope, looped through the side handle or attached to one of the other groups of inserts, and firmly attached to a
suitable structural member as indicated by a certified structural engineer.
The recommended range of torque for the mounting bolts is 3-1/2 to 4 lb/foot of torque. DO NOT OVERTIGHTEN!
If an insert point is stripped and the bolt spins free, it has been damaged and the cabinet cannot be flown! We
recommend the use of Thread-locker at the insert point bolts, so the bolts cannot vibrate loose.
Never transport the cabinet using the array bracket or other mounting brackets as a structural member while
the cabinet is mounted on an array bracket or other mounting bracket and unsupported otherwise, as this may
unduly stress the mounting inserts.
WARNING! (NOTE TO STRUCTURAL ENGINEER)
NOTE: The screws in the Impulse 12D fly point plate inserts are merely used to plug the mounting point holes;
those screws are not intended to be used for attachment or flying purposes. Use the correct type and grade of
bolt into the mounting point inserts. The correct mounting bolt diameter and threads per inch are: 1/4" X 20.
Use of a grade five-bolt or better is recommended.
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