Alpine SPX-Z18T - Manuel (Page 15)

13
English
System Type 1
• Type-1B is for such
cases where
pathlength is
nearly the same to
all drivers, but
where the mount-
ing surface
orientation creates
a uniform but fairly
extreme off-axis
listening angle.
System Description
With all three drivers mounted close together and equidistant to the listening position,
this is surely the most favorable configuration for a component speaker system. Al-
though such an installation may not often be practical in situations other than the demo-
board, it is certainly possible given the custom fabrication techniques available today. In
anticipation this, a degree of tolerance is built into the settings described below for the
most likely cases, though some experimentation may be necessary if all conditions
cannot be met. If choosing to go beyond the recommended settings or utilizing the
network in a partially active mode, keep in mind that phase coherence and flat summa-
tion remains critical even in the idyllic flat baffle situation, as each driver type exhibits
unique phase and group delay characteristics.
• Type-1A is the
default setting of the
network, and
assumes essentially
on-axis positioning
and equal
pathlength of all
drivers relative to
the listening
position.