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Configure a 24dB/octave filter for the Rear channels.
• Rear XCards 1 & 2 set identically to High-Pass or Low-Pass
REM B+ GND
LED
Rear Front
XCard Rear 1
XCard Front
XCard Pass-Thru
LP
20Hz-100Hz
24dB/octave LP
LP
XCard Rear 2
–L++L– +R– –R+
Configure a 12dB/octave Bandpass filter for the Rear channels.
–L+
REM B+ GND
LED
+L– +R–
Rear Front
XCard Rear 1
XCard Front
XCard Pass-Thru
HP
100Hz-275Hz
12dB/octave BP
LP
XCard Rear 2
–R+
• Rear XCard 1 inserted as High-Pass
• Rear XCard 2 inserted as Low-Pass
* The 400x4 is shipped with 100Hz XCards. At least one of the XCards must be
customized to enable proper bandpass operation. Refer to “Using the XCard” on
page 14 for more information. Additional crossover card frequencies are available
from your Authorized Rockford Fosgate Dealer. (See page 2)