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Fig. 5.2/7: Low shelving filter; Gain: -10, -6, -3,
0, +3, +6, +10 dB; crossover frequency = 300
Hz, Q = 0.7
Remarks fo adjustments
The neccessary adjustments of the parametric
EQ’s should be based on a correct measurement
in the beginning. This measurement should not
only be taken in the listening position, but also
at a number of other positions in the listening
area ( 10 to 15 are recommended ). These
results should be taken for an „averaging result“
and for the final decision, which frequencies
should be adjusted or not! With some experience
it will be possible to see which adjustment will
also have some influence on other bands at an
octave or more above. Finally the result of the
adjustment should be checked and verified again
by a number of measurements in the listening
area.
A measurement in different listening position is
based on the knowledge, that a positive
adjustment may have a negative result in an
other part of the listening zone.
Accurate measurements are the basics for a
successful adjustment of the PEQ functions
described here.
This is the main reason why a complete
adjustment on audible results from the individu-
al filter bands is not recommended. The
adjustments should be reduced to the low
frequency area.
