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The
RUBICON
amplifiers incorporate an on-board staggered
elec-
tronic crossover, with RCA outputs to drive an external amplifier. No
external electronic crossover is necessary. The high and low pass
portions of the crossover can be set independently of one another.
To engage the High Pass filter, set the left
crossover
switch on the
top of the amplifier to
“H.P.
X-OVER”, and use the frequency adjust-
ment knob marked “H.P. X-OVER”. To engage the Low Pass filter,
set the left crossover switch to either “SUB SONIC” or “HAWKINS
BASS CONTROL” (see pages 1 O-1 1 for more details), and set the
right crossover switch “L.P. X-OVER” to the “IN” position.
In many car audio installations, there is a tendency for a
“midbass
boom.” Because of their interior dimensions, most cars will
reso-
nate or ring at these
midbass
frequencies. If we design the system
so there is reduced output in this region, the final response is very
smooth and natural sounding. The high pass cossover is
indepen-
dently variable from 70 to 160 Hz at 12 dB/Octave, and the low pass
crossover is independently variable from 55 to 220 Hz at 24
dB/Oc-
tave.
For initial crossover setup, try setting the low pass filter to approxi-
mately 60 Hz, and the high pass filter to approximately 100 Hz.
Change the crossover points to accommodate a good mixture of
frequency response, power handling, and personal preference.
Cros
Crossover
.L
P
HP
XOVER-73
192
Hz
XOVER
HA’NWS
l 30
70Hz
I
’
SLBSCNC
l 13
30Hz
blF~R7%N~
Do
not
have
the
law
Pass
filter
and
the
High
Pass
filter
buth
engaged
at
the same time.
While
this
won’t
damage
the amplifier, the
frquency
range
of the amplified sig-
nal will be
severJ’y
limited.
.
12
d6Dctave
High Pass
24 dB/Octave Low Pass
9