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deceiving due to its 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's in the
bass range in excess of 120 dB at 1 M from the speaker!
USE OF THE IMPULSE 500P SUBWOOFER
GETTING AC POWER TO THE IMPULSE 500P SUBWOOFER
The Impulse 500P Subwoofer comes with an eight-foot IEC connection AC power cord. It is
likely that some sort of extension cord will be used with this powered speaker system, so
make sure that the extension cord is no longer than necessary, and is of a sufficient current
capacity to maintain safety. Extension cords no longer than necessary and of the largest
current capacity available will maximize the power output capability of the Impulse 500P
Subwoofer's internal amplifiers. For best results, do not power anything else from the
extension cord used to power the Impulse 500P Subwoofer, in order to minimize the voltage
drop that all extension cords cause. Running one typical extension cord back to the wall plug
for the entire sound system is not the way to maximize sound system performance.
USE OF A STAND
Use of a stand for the Impulse 500P Subwoofer is not necessary, and maximum bass output
will occur when it is close to room boundaries such as a floor; however, there a some
instances where stand mounting might be desired. The built-in stand adapter makes use of
the Impulse 500P Subwoofer with a suitable stand easy, as long as it has a standard 1 3/8"
diameter pole rated for at least 70 lbs. and has a minimum base equivalent to or broader than
the Peavey S-1 stand. When using the Impulse 500P Subwoofer with a stand, be sure to
position one of the legs in the same direction as the rear of the system for maximum stability.
Peavey recommends the use of the Peavey S-1 stand for safety, should use of a stand be
desired. Always secure the input cable with tape or a cable guard, and leave enough slack at
the Impulse 500P Subwoofer input end to avoid anyone tripping over the cable or pulling the
Impulse 500P Subwoofer over when stand mounted. Also, do not overextend the stand the
Impulse 500P Subwoofer is mounted on.
GETTING A SIGNAL TO THE IMPULSE 500P Subwoofer
The Impulse 500P Subwoofer has a variety of ways to input a signal to the system. The
balanced line level input(s) allows the use of a 1/4" phone plug, either a standard single-
ended (tip-sleeve) plug, or a balanced RTS (ring-tip-sleeve) type plug OR either a male or
female XLR plug.
While the standard single-ended 1/4" phone plug will work well, and the balanced input
circuitry will provide some interference rejection, a balanced cable using either the balanced
RTS 1/4" phone plug or the XLR plug will provide superior interference rejection and
performance. Sometimes, with difficult interference problems, it will be helpful to lift the shield
ground on a balanced cable at the Impulse 500P Subwoofer end only. Check any input
changes carefully, always turning the volume control down before plugging and unplugging
cables
Use of high-quality premium cables is recommended for the Impulse 500P Subwoofer, as
these usually have better shielding and materials, and will provide greater long-term reliability.
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