Rockford Fosgate Punch P500X4D Installation & Operation Manual page 5

Variable Crossover
Is a built-in 12dB/octave Butterworth filter with
a crossover point variable from 50Hz to 500Hz.
2/4 Channel Switch
Setting this switch to the 2CH. position, switches the inputs to a 2-channel mode,
allowing connection to only the front inputs with a 4-channel output.
RCA Input/Pass-Thru Jacks
The industry standard RCA jacks provide an easy connection for signal level input. They
are nickel-plated to resist the signal degradation caused by corrosion. The Pass-Thru
provides a convenient source for daisy-chaining an additional amplifier without running
an extra set of RCA cables from the front of the vehicle to the rear amplifier location.
Gain Control
The input gain control is preset to match the output
of most source units.
Design Features
illus.-1.1
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