Rockford Fosgate AF/4HD, Installation Manual

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INTRODUCTION
The Rockford Fosgate AF/4HD is an active electronic crossover that incorporates HD (Hybrid
Design) to provide state-of-the-art flexibility, performance and pleasing aesthetics. Its features
include: four stereo inputs with true fading capability, infinitely adjustable frequency modules,
four user definable high pass, low pass and band pass filters, single channel summing for mono
applications, fully isolated high voltage power supply, low noise circuitry, low distortion, high
load driving capacity 750 mV RMS input level, 750 mV RMS output level.
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FADING CAPABILITY
ONE CHANNEL CAN BE SUMMED FOR MONO APPLICATIONS
TWO USER SELECTABLE FILTERS (HIGH PASS OR LOW PASS)
TWO USER ADJUSTABLE BAND PASS FILTERS THAT CAN ALSO
BE SELECTED AS HIGH OR LOW PASS FILTERS
CAPABLE OF UTILIZING ONE TO FOUR INPUTS
GOLD PLATED RCA’S
INTERNAL FUSE FOR PROTECTION
CONCEALED MOUNTING
AUDIO CIRCUIT IS HYBRID DESIGNED
LOW DISTORTION
WIDE RANGE OF FREQUENCY MODULES, OR FASHION YOUR OWN
SMALL, LOW COST
HIGH LOAD DRIVING CAPACITY: CAPABLE OF HANDLING UP TO 10
ROCKFORD FOSGATE AMPLIFIERS
12dB/OCTAVE CROSSOVER SLOPES
CASCADING OF OUTPUT TO INPUT PROVIDES 24dB/OCTAVE SLOPE
INPUT AND OUTPUT LEVELS
The AF4 is designed for preamp-level (750 mVRMS) levels. Speaker-level inputs must be
attenuated to under 1.0 VRMS.
Net gain in the filter passband of the AF4 is unity. (output levels are equal to input levels)
POWER WIRING INSTRUCTIONS
The Black 16-gauge wire should be grounded to the chassis. The White (or white with a red
stripe) 16-gauge wire should be connected to a source of constant 12-Volt power. The Red 16-
gauge wire is the remote turn-on wire. Connect it to the radio “Auto-Antenna” lead, or to some
other point that goes “positive” when the system turns on. See Figure 1.
PROTECTION FUSE
The AF4 has a built-in main power fuse for over current protection. If blown, replace with AGC
amp fast blow fuse. See Figure 1 for fuse location.
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