Rockford Fosgate 250.1 Us I N G T H E Xcard, Cu S T O M I Z I N G T H E Xca R D, High-Pass, 3386

US I N G T H E XCARD

The crossover functions are controlled through the use of an XCard and can be set for high-pass, low-pass or full range operation. The XCard shipped with your amplifier is set for Full Range. Each crossover card has two faces: one face operates Full Range, the other has arrows to indicate the edge for selecting HP (high-pass) or LP (low- pass) operation. Orient the card with the desired operating edge, indicated by the arrow, toward the socket terminals inside the amplifier. Firmly, but carefully, plug the card into the socket.

High-Pass

➝LP		➝
	HP

Low-Pass

➝HP LP➝

Full Range

FULL ↕

CU S T O M I Z I N G T H E XCA R D

AO

DP

VE

AR

A N T C I E O

D N

The crossover point can be altered by changing the 4 resistor values. Use the following formula to select the appropriate resistor value to be placed on the XCard.

3386		= R (in kΩ	) for .047∝ f cap
	fo
7234		= R (in kΩ	) for .022∝ f cap
	fo

	Crossover Card
R1	R2 Pass	R1	FULLR2
	Low Pass
	Full Range

The actual formula is: R =		1
	2π f c
		o

Where: R = Ω

fo = desired crossover frequency c = capacitor in farads

ex: .047 x 10-6for .047mf cap

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