Frequency Match Modules - Audio Control EQL Owner's Manual

Concert Series Owner's Manual
Making Y Making Y our Own our Own
Making Your Own Making Y Making Y our Own our Own
Programmable F Programmable F
Programmable F Programmable Frequency Programmable F
Match Modules Match Modules Match Modules Match Modules Match Modules
The EQL comes with an 18 dB per octave
Programmable Frequency Match low-cut filter
module already set to 33 Hz. This will act as a
subsonic filter, protecting your woofers. If you
have large woofers (i.e., 12" or 15"), you may
want a lower frequency module. With smaller
woofers (i.e., 6" or 8"), use a higher frequency
Programmable Frequency Match module.
Additional modules with pre-set frequencies
are available from an authorized AudioControl
dealer, or you can create a custom low cut filter
module by using the following formula
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18
requency requency
requency requency
4 :
7200
Frequency (in Hz)
EXAMPLE – For a 25 Hz filter, the
formula yields a resistor with a value of
7200
= 288 kohms
25
NOTE: Use only resistors having a tolerance of
five percent or better (i.e., 5%, 2%, etc.).
WARNING WARNING WARNING WARNING WARNING
TURN OFF THE SYSTEM BEFORE CHANG-
ING THE MODULE, OR ELSE SOMETHING
IN YOUR SYSTEM WILL BE DAMAGED!
CAUTION: The Programmable Frequency
Match Module must always be installed, even
if you are not using the filter. Failure to do so
may damage the EQL.
= Resistor Value (in kohms)