Electro-Voice Speaker System Owner's Manual page 30

Frequency
Frequency offers a selectable frequency range from 20.0 Hz to 20,000Hz.
Hi-Pass/Lo Pass
The DC-One Hi-Pass and Lo-Pass filters are determined by selecting the Type
For detailed
from the list of parameters, (see list above) and by choosing a frequency
EQ plot im-
range between 20.0 Hz to 20,000Hz. (See above)
ages please
see page 45
The crossover filter generally consists of a
low pass filter in one channel and a high
pass filter in the adjacent channel. This is
where the frequency x-over filter's Hi-Pass
parameters are set. The Hi-Pass frequency
parameters are linked to the
corresponding Lo-Pass frequency
parameter unless in Full Edit Mode or
using the Configuration option. Please
refer to the Configuration section of this
manual for details on the effect different
Configurations have on channel linking.
The Type parameter defines the filter
characteristics of the crossover Hi-Pass
filter. Different slopes and filter responses
(6dB, 12dB with different Q values,
Bessel, Butterworth, Linkwitz-Riley) are
available and the filter can be bypassed.
Again, the Hi-Pass frequency parameters are linked to the corresponding Lo-
Pass frequency parameter depending on the Configuration that is currently
being used. High pass frequencies are set with a pre-determined frequency
that attenuates frequencies below (the crossover point). On the contrary, a
Low Pass filter passes frequencies below the crossover point and attenuates
those above.
Crossover Alignment Delay
To access the Crossover Delay screen, press
the X-Over button found on the output
processing menu. Subsequent button
presses will toggle the display between
OUT1 to OUT6. Use the <SELECT> button to
navigate between the Crossover parameters.
Adjust the values of each parameter using the up/down VALUE arrows.
Delay - Use this parameter to compensate for physical offsets of the
acoustic centers of transducers within a loudspeaker cabinet. For
example, due to cabinet construction, the acoustic center of a high
frequency transducer may be mounted behind or in front of the acoustic
center of the low frequency transducer. The Delay parameter can align
the audio signal between the multiple transducers within the loudspeaker.
Polarity - The polarity of the audio signal can be inverted using this control.
Unit - The user may select betwen time and distance display. Distances
are automatically converted into delay times. This calulation also includes
the influence of the environmental temperature based on the
Temperature parameter in the Setup Menu.
Bypass - Setting this to On disables the Crossover Delay.
Here the HiPass Output 2 Crossover is
set to Linkwitz-Riley 24dB with the fre-
quency set to 60.0Hz.
30
Linkwitz 24dB Curve