Rockford Fosgate AF/4HD, Installation Manual

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The selection is done simply by placing the capacitor module (C) in the socket location on the
PC board marked “High” for high pass or “Low” for low pass. The empty location is where the
resistor frequency module (R) is placed. See below.
Note: Outputs one andfourcan be defined as either a high pass or low pass depending on where
the capacitor module (C) is placed. Outputs two and three are set band passes.
HIGH
LOW
HIGH LOW
HIGHPASS
BANDPASS
BANDPASS
HIGH
LOW
HIGHPASS
HIGH LOW
HIGH LOW