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U
S I N G T H E
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
amplifier. Firmly, but carefully, plug the card into the socket.
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
f o
7234
f o
Where: R = ohms
XC
ARD
High-Pass
LP
HP
= R (in k ) for .047 f cap
= R (in k ) for .022 f cap
f o = desired crossover frequency
c = capacitor in farads
ex: .047 x 10 -6 for .047 f cap
Low-Pass
HP
LP
Crossover Card
High Pass
Low Pass
Full Range
– 14 –
Full Range
FULL
The actual formula is:
1
R =
2 f o c
FULL
a
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