Rockford Fosgate 250.1 Manuel d'utilisateur télécharger pdf (Page 17)

USING THE 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.

CUSTOMIZING THE XCARD

7234

3386

= R (in kΩ) for .047µf cap

= R (in kΩ) for .022µf cap

Crossover Card

High Pass

Low Pass

Full Range

FULL

2πf

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.

Low-Pass Full RangeHigh-Pass

FULL

↕

➝

The actual formula is: R =

Where: R = Ω

= desired crossover frequency

c = capacitor in farads

ex: .047 x 10

-6

for .047mf cap

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Rockford Fosgate 250.1 Manuel d'utilisateur Page 17