Audio Control EX concert series Owner's Manual page 22

Concert Series Owner's Manual
Making Your Own (cont'd)
Additional modules with pre-set frequencies are
available from an authorized AudioControl
dealer, or you can create a custom crossover
and/or low cut filter by using the following
formula 5 :
7200
Frequency (in Hz)
EXAMPLE – For a 2500 Hz crossover, the for-
mula yields a resistor with a value of:
7200
= 2.88 kohms
2500
NOTE: Use only resistors having a tolerance of
five percent or better (i.e., 5%, 2%, etc.).
5 (HEY! Not another #%*&% plug disguised as a #%*&% foot-
note!) — ok, OK, OKAY! — We'll make a deal with you. Send us
ten bucks, and we'll send you the whole set of Tech Papers
(which includes our Technical Note #1005 Crossovers Modules).
And you won't have read another tiny footnote — unless you
want to.
20
= Resistor Value (in kohms)
WARNING
TURN OFF THE SYSTEM BEFORE CHANG-
ING MODULES, OR ELSE SOMETHING IN
YOUR SYSTEM WILL BE DAMAGED!
Figure 8. Removing
the top panel lets
you access internal
crossover and PFM
modules.
INNARDS (top view)