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7. Signal Input Switch – This switch allows selection of 2-channel
or 4-channel input.
8. RCA Pass-Thru Jacks – 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. One of the internal XCards can be designated
to the Pass-Thru, creating a dedicated low-pass, high-pass, or full
range output.
9. Input Sensitivity Controls – The input level controls are preset for
500mV which will match the output of most source units. They
can be adjusted to match input levels ranging from 150mV to 3V.
10. Phase Switch – This switch enables you to easily invert the rear
channel phase without having to disconnect the speaker wires.
11. LED Power Indicator – The LED illuminates when the unit is
turned on.
12. XCard (Internal Crossover) – These built-in crossover cards are
configurable for a multitude of operating frequencies. The orien-
tation of the card in its socket determines the function of high-
pass, low-pass, or full range operation.
– 8 –
Front XCard
Rear XCards
Full Range
FULL
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ROCKFORD CORPORATION
MADE IN THE USA
®
Low-PassHigh-Pass
HP
➝
➝
LP
HP
➝
➝
LP
XCard 1
XCard 2
XCard 3
XCard 4
Dual Filter
Pass-Thru XCard
12
XCard Rear 1
XCard Rear 2
XCard Pass-Thru
XCard Front
®
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4
50 Watts x 4 into 4 Ohms with less than 0.05% THD
100 Watts x 4 into 2 Ohms with less than 0.10% THD
®
AMPLIFIER