Alpine SPX-Z18T - Manuel (Page 16)

14
System Type 1
10
0
–10
–20
–30
–40
–50
20Hz 30Hz 100Hz 1.0KHz 3.0KHz 10KHz 30KHz 300Hz
Type-1A: Pathlength to the listening posi-
tion is considered to be basically equal in
this case (ideally 2-3m away), with relative
on-axis positioning of all drivers. Phase link-
age is accomplished with a low Q 2
nd Order
high-pass filter on the tweeter, 1 st Order low-
pass and 4 th Order high-pass on the
midrange, and a semi-4 th Order low-pass on
the woofer. This results in acoustic crosso-
ver points of 3.8kHz and 700Hz respectively.
Network Jumper Setting
HP-2 HP-1 LP-2 LP-1 +2dB
MID HP/LP
–3dB –1.5dB 0dB/0
°
+1.5dB/15
°
+4dB/30
°
HP-1
HP-2
HP-3
BYPASS
BYP
ASS
LP-1 LP-2 LP-3
LP-BYP
ASS
HP-BYP
ASS
TW LEVEL
WF LP MID HP/LP
WF/MID
SIGNAL LINK
SPX–Z18T
TW HP
MID/TW
SIGNAL LINK
+
—
+
—
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.