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4
INSTALLATION STEP 2
t
In most car audio installations, there is a tendency for a
“midbass
boom.”
Because of their interior dimensions, most cars will resonate or ring at these
midbass
frequencies. If we design the system so there is less musical
information in this region, the final response is very smooth and natural
sounding.
vet
pass
The
SA-120,
244,
&
24s
incorporate a
staggered
electronic crossover. The high
and low pass portions of the
crossover can be
set
independent of one another.
_I
Below is a chart of S.I.P. values
which can be
used
for changing
the factory preset crossover
points (low pass only on SA-245).
FREQUENCY RESISTOR VALUE
COLOR CODE
53 Hz
30Kn
Green-Green
73 Hz
22Kc2
Green-White
~_~_
~-
.-
.c-_-.--l._-
.~.._^I_.
--_
.-.--.
----
a9 Hz
1aKn
107 Hz
15KR
Violet-Green
145 Hz
11
KR
Violet-White
195Hz
a.2 K
fi
288 Hz
5.6
K
n
485
Hz 3.3 K
n
aookk
2.0 K
n
NOTE:
The
following formula may be used to
detenniie
values in ctiating
%ustom”
resistor packs.
The
h-equency
is
equal
to
l&J0
ijivided
by the
individua/tesistorva/ue,or16000YKYRkohms=xHz.
TomakeacustomS.l.P.,
use
4
identic8lty
valued t&&tom of 296 or tighter tolerance.
the S.I. P.
for
more
inf&matM
See
the
di+wfi)g
of
12
Your multi-channel Soundstream amplifiir
(SA-244
81245)
can be driven
with
either one or two pairs of stereo inputs (three with the
SAM&
If your source unit
has front
and rear outputs, you can take
advantage of its fading capability by
I
driving the multi-channel amplifiers with two pairs of input
In addition, if you have
another amplifier, you can drive it with the outputs of the
SAgI
or 244. When
I
operating a pair of amplifier channels in mono, only one input is necessary.
On
Sound&ream*
amplifiers, pairs of channels may be bridged for mono
operation. To do so, simply put the
stereo
switch into the ‘mono” position and
follow the mono wiring (Right Positive goes to speaker’s positive; Left Negative
goes to speaker negative).
Stereo
for normal operation.
Mixed-MOnO
in order to drive stereo and mono simultaneously; works well for
center channels. It can be used
anytime you need a
summed mono channel. It
also makes for a cost-effective means of driving an entire system with only 2
channels of amplification.
Bridged
Mono
for dedicated single channel operation; ideal for driving
subwoofers.
It is also used when large amounts of power are necessary for
single speakers.
In
bridged
mono,
on/y
the
rlgfrt
channel input (per
pa/r
of
channels) is active.
STEREO
UseL&Rlnputs
_Q+
_Q+
;
-I
MONO
MONO
Use R Input Only
-0,
_a+
MIXED MONO
lJseL&Rhwuts