Rockford Fosgate Fanatic FNQ2414 Operation & Installation page 10

Bandpassing the Midrange
• The Fanatic Component Systems are optimized for full range music re-
production. In cases where a subwoofer is used, the midrange can be
bandpassed in order to prevent overlapping frequencies from the
midrange into the subwoofer.
1. Determine the frequency range that the subwoofer will play (i.e.: 20Hz-
80Hz)
2. Use the low-pass crossover frequency of the subwoofer system (i.e.:
80Hz) as the high-pass crossover frequency for the midrange
3. Select the appropriate capacitor value (i.e.: 500mF) to properly band-
pass the midrange
4. Place the capacitor in series with the "+" terminal of the speaker
+
C1
–
Frequency
(Hertz)
80Hz
100Hz
130Hz
200Hz
260Hz
400Hz
– 8 –
0dB
–3dB
Subwoofer
80Hz
6dB/octave HP
Speaker
(4 ohms)
C1
500mF
400mF
300mF
200mF
150mF
100mF
Midrange Tweeter