Rockford Fosgate 5.3x - Manual (Page 16)

3386
fo
= R (in k
Ω
) for .047
µ
f cap
= R (in k
Ω
) for .022
µ
f cap
7234
fo
Where: R =
Ω
fo = desired crossover frequency
c = capacitor in farads
ex: .047 x 10-6 for .047mf cap
Crossover Card
High Pass
Low Pass
Full Range
R1 R2 R1 R2
FULL
C1 C2 C1 C2
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.
U
S I N G T H E
XC
ARD
1
2
π
foc
The actual formula is:
R =
The crossover functions are controlled through the use of an XCard
and can be set for high-pass, low-pass or full range operation. 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 ampli-
fier. Firmly, but carefully, plug the card into the socket.
– 13 –
C
USTOMIZING THE
XC
ARD
a
d
v
a
n
c
e
d O
p
e
r
a
t
i
o
n
Low-Pass Full Range High-Pass
FULL ↕ HP
➝
➝
LP
HP
➝
➝
LP