Alpine F#1 Status SPX-Z18T Mode D'emploi page 24

Network Jumper Setting
Type-3B: Despite the fact that the midrange
and tweeter are mounted in the same plane
and in close proximity, their orientation re-
sults in the acoustic center of the midrange
being farther away. Therefore, the midrange
is considered to be 8.5cm farther than the
tweeter, while the woofer is approximately
25cm closer than the midrange.
For the upper crossover point, a relatively
rd
low Q 3 order high-pass filter is employed
on the tweeter in conjunction with a semi-1
order low pass on the mid. Then for the
midrange to woofer transition, a 3
high-pass on the mid integrates well with a
nd
semi-2 order low-pass on the woofer. To-
gether, these filter combinations result in
acoustic crossover points of 3.8kHz and
600Hz.
Notes:
• Highlighted tweeter level jumpers are the recommended settings for each configura-
tion, but user adjustment may be desirable.
• Transfer function simulations only illustrate the effect of the filter upon the input sig-
nal, and therefore do not represent the actual frequency response of the system.
• If separate channels of amplification are used (bi-wire or tri-wire mode), the appro-
priate signal link jumpers must be removed.
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st
rd order
MID HP/LP
SPX–Z18T
WF/MID
WF LP
SIGNAL LINK MID HP/LP
+
—
10
0
–10
–20
–30
–40
–50
20Hz 30Hz 100Hz 300Hz
TW HP
HP-1
HP-2
HP-3
BYPASS
MID/TW
SIGNAL LINK
+
—
1.0KHz 3.0KHz 10KHz 30KHz
TW LEVEL
21