Rockford Fosgate OEQ-1, Руководство пользователя

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Step 2: Feed one channel of the Octave Equalizer with pink
noise from the pink noise generator.
Step 3: Evaluate the unequalized response. Major system
problems, for instance large response “holes” or “peaks”,
should be solved by correcting speaker or system problems.
Trying to equalize out large response errors (over 6dB) will
result in overdriven amplifiers and speakers, and should not
be attempted.
Step 4: Adjust equalizer for the system response desired.
Since adjacent bands interact with each other, you will need
to go back and forth between frequencies to get the best
balance.
Step 5: Move the microphone to the opposite side, change
the pink noise channel, and equalize for the same response
as Step 4.
SOME SUGGESTIONS
l
It is best to equalize one channel at a time. Trying to set up
both channels at once confuses which channel is producing
the results.
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If you can identify a response problem by ear, move the
microphone to a point that reveals the problem. Mike
placement can have a very large effect on response, and
some microphone positions will obscure problems instead
of showing them.
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The audible effect of response problems is a product of both
the magnitude of the error and its width. A 9-dB “hole” one/
third octave wide is less audible than a 2-dB “dip” two
octaves wide. Try for an average response equally above
and below the desired response over each octave span.
l
The human ear averages the overall sound-field response
by complex physiological and psychological pro-cessing. A
single microphone only hears at one point, which must be
selected to represent as closely as possible the overall
sound field. Since tonal perception is most influenced by
the nearest source, we usually equalize each side sepa-
rately. The mike is set up at the driver’s listening location,
facing forward, and the left channel is equalized. Then the
mike is set up at the passenger’s location and the right
channel is set up to match the left. This procedure usually
gives good results.
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