Rockford Fosgate 400x4 operation manual Amplifier

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.

®

® 4 AMPLIFIER

t r a n s • a n a

®

ROCKFORD CORPORATION

MADE IN THE USA

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

Front XCard	XCard 1
Rear XCards	XCard 2
Dual Filter
	XCard 3

High-Pass

➝LP H P➝

Low-Pass

➝P H L P➝

Full Range

F U L L ↕

12

Pass-Thru XCard XCard 4

XCard Front

XCard Rear 1

XCard Rear 2

XCard Pass-Thru

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