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System Type 1
10
0
10
20
30
40
50
20Hz 30Hz
100Hz
1.0KHz 3.0KHz 10KHz 30KHz300Hz
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
BYPASS
LP-1
LP-2
LP-3
LP-BYPASS
HP-BYPASS
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.
16


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