Apex Digital Intelli-X2 26 - Driver Alignment; Crossover; Parametric EQ

26
Driver Alignment
In addition to the delay inserted with the Delay parameter
above, each Output Channel may also have an additional
delay added. This Driver Alignment delay is included to time-
align individual drivers within a cabinet (especially useful for
custom designed cabs). Thus Driver Alignment is concerned
with individual drivers, while output Delay is concerned with
overall time alignment of cabinets within a line array or point
source system. Delay and Driver Alignment may be thought
of as “coarse” and “ne” delays.
The parameters available are:
Enable – either the ENABLE or Enter buttons may be pressed
to insert driver alignment delay in the channel. Default is Off.
Duration – allows the delay to be set in units of time, from 0
to 30 ms, in microsecond increments. Note that the duration
is also displayed as the equivalent number of digital samples.
Distance – this provides an alternative method of setting the
delay time, in units of distance, from 0 to 100 m. Entering a
delay in terms of distance will usually be more convenient in
real-world situations.
Crossover
This screen is where each Output Channel has its frequency
response dened, in terms of a hi-pass and a lo-pass lter. As
well as being able to set the turn-over frequencies of each lter,
it is also possible to dene the lter algorithm used to more
accurately tailor the response.
Each of the two lters in each crossover has three parameters
which may be set on-screen. Use the rotary control to scroll
through the six available, pressing Enter to select the one to
be adjusted.
Enable – the Enter button may be pressed to enable the
lter. There is no default setting as such, as whether a lter is
enabled or not is entirely dependent on the Preset in use and
the output being congured.
Type – 19 different algorithms, based on the three most
common lter types are available for each crossover lter.
For each lter type, the algorithms differ in the slope of the
frequency response (often referred to as the “order” of the
lter). The full list is:
TYPE DISPLAYED AS:
Butterworth lters Butterw.6dB/o
Butterw.12dB/o
Butterw.18dB/o
Butterw.24dB/o
Butterw.30dB/o
Butterw.36dB/o
Butterw.42dB/o
Butterw.48dB/o
Linkwitz-Riley lters Linkwitz-R.12dB/o
Linkwitz-R.24dB/o
Linkwitz-R.36dB/o
Linkwitz-R.48dB/o
Bessel lters Bessel 12dB/o
Bessel 18dB/o
Bessel 24dB/o
Bessel 30dB/o
Bessel 36dB/o
Bessel 42dB/o
Bessel 48dB/o
Frequency – The turn-over frequency of each lter is adjusta-
ble from 10 Hz to 20 kHz, in 0.1 Hz steps.
Parametric EQ
As well as the crossover lters, each Output Channel of the
Intelli-X
2
is equipped with a 12-band parametric equaliser.
These are used to further rene the frequency response of
the output to suit a particular type of loudspeaker or driver.
Loudspeaker manufacturers will generally supply the equaliser
characteristics to be employed for optimum performance.
To enable the entire Parametric EQ section, press the Enable
button. Default is Off.