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mixer to the first Impulse 500P Subwoofer, then hook a cable from one of the first Impulse
500P Subwoofer's inputs to the second Impulse 500P Subwoofer's input. This can be
continued for several units, depending on how long the cables are, and the total capacitance
of all the cables. With a low source impedance, such as a typical mixer output, and typical
balanced cables, three or four Impulse 500P Subwoofer's can be daisy-chained from one
output using 30- or 40- foot cables without obvious loss of high frequencies.
USE WITH IMPULSE 500P AND A MICROPHONE
When using the Impulse 500P Subwoofer with the Impulse 500P full range speaker system,
and it is desired to use the Impulse 500P with a single microphone for karoke or PA
announcements along with music, it is recommended that the microphone be connected
directly to the Impulse 500P via the built-in mic input, instead of through a mixer microphone
input and to the Impulse 500P Subwoofer's electronic crossover. While music will often
benefit from the extra low end the subwoofer adds to the pairing, vocals do not maintain their
clarity as well when additional bass output is added. By using the mic input on the Impulse
500P, the vocals in the mic will not get any additional bass boost, and the microphone input
filtering will aid in maintaining vocal clarity. There is less tendency for very low frequency
feedback, which could damage the powered subwoofer. See the Impulse 500P owner's
manual, the Rear Panel Description, Mic Input portion, and the Use of the Impulse 500P
section, the Use of the Mic Input with Simultaneous Music playback portion.
If the Impulse 500P Subwoofer is used as part of a full PA sound system, and multiple
microphones are run into a mixer, and into the Impulse 500P Subwoofer, it might be helpful to
make sure that the subwoofer's output is not set too high, so that the vocals are not made to
sound too boomy or muddy. Avoiding bass boost on the mic channels, or even using a little
bass cut on each mic might help avoid vocal boominess as well.
APPLICATIONS
The Impulse 500P Subwoofer has a variety of applications when used in conjunction with a
full range system, such as sound reinforcement, or for musical playback. A typical signal
source for the line level inputs (5) of the Impulse 500P would be a sound reinforcement
mixing console (mixer), or the output from a CD player or tape deck.
TROUBLESHOOTING
No output at all:
First, make sure the unit has AC power and is turned on. If so, the Power LED (4) should be
illuminated. If it is not, check that the On-Off switch (3) is in the "On" position, check the IEC
power cord connection (2), making sure it is fully engaged and seated. Make sure the AC line
cord is plugged into a working AC outlet, and last, check the fuse (1). (See the REAR
PANEL/Fuse section for safety instructions.
Then, make sure that the inputs of the Impulse 500P Subwoofer are getting a signal by
plugging the cable run into the Impulse 500P Subwoofer's inputs to some other device
capable of determining this (for example, a power amp and speaker). If there is still no output,
then be sure the volume control has been turned up to a reasonable level (1/3 to 1/2 way).
Has the Impulse 500P Subwoofer been in direct sunlight or excessive heat? If so, it may have
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