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U
SING
THE
XC
ARD
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.
C
USTOMIZING
THE
XC
ARD
7234
f
o
3386
f
o
= R (in kΩ) for .047mf cap
= R (in kΩ) for .022mf cap
1
2πf
o
c
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
↕
HP
➝
➝
LP
HP
➝
➝
LP
The actual formula is: R =
Where: R = Ω
f
o
= desired crossover frequency
c = capacitor in farads
ex: .047 x 10
-6
for .047mf cap
a
d
v
a
n
c
e
d
O
p
e
r
a
t
i
o
n
– 14 –
Crossover Card
High Pass
Low Pass
Full Range
R1
R2
R1
R2
FULL