Soundstream DX7 Owner's Manual
DX7
Staggered Electronic
Crossover Network
OWNER’S MANUAL
TECHNOLOGIES
DX7 WIRING DIAGRAM
Some OEM radios may or may not require
connection of the radio’s speaker ground.
Check your radio’s owner’s manual.
Power
Ampllfler
Connect lo Remote Turn-on
of Aftermarket Source
leave Jumper connected to 12V
11
High level Input IS not used
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Umt,
Fuse
I
Battery
Ill
n
DX7
-
or
Delayed
Remote
Turn-on
OWNER’S
Staggered
MANUAL
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Ebcironic
Congratulations on your purchase of the Soundstreom DX7 electronic
crossover. You now own one of the finest and most versatile electronic
crossovers made, a
performance.
Please make note of the following information for your records. Doing
so will protect your investment should your DX7 ever require service or
replacement.
Model
Number: Soundstreom DX7 Electronic Crossover
Serial
Number:
Dealer’s Name & City:
Date of Purchase:
Dote of Installation:
This Soundstreom product is the result of American design and crafts-
manship, and was manufactured using the highest quality control standards. Your DX7 should
We recommend that you review this manual in order to familiarize yourself with the remarkable capabilities of the DX7. Doing so will ensure
your obtaining the best possible performance from the product.
retain this manual for future reference.
Crossover Network
precision
component which provides true audiophile
deliver
many years of pleasure.
Please
OVERVIEW
&Channel input/7-Channel
The Soundstream DX7 electronic crossover is a four-channel
channel out design which retains the full fading capability of your
source(s). it provides a pair of subwoofer
channel output in addition to he usual front (L&R) and rear (L&R) outputs. (See diagram.)
Htgh Level Input
GVXKld
Left
Rear
Riiht
Rear
Lelt Front
Right Front
1
Rear
lnKhll
Len
In
Right In
H,gh
Left Out
High Right Out
1
Output Design
1 subwoofer
OUI
Lelt Sub Out
Uiiht
Sub Out
1
outputs
’
in/seven-
and a summed center
IiiweriRamotes
112”
Control
I”
Ground
Remote Out
Remote In
1
pmni
In/Out
Len
In
Right In
High
Left Out
Hagh
Center Out
Hagh
I
Right Out
CROSSOVER
Symmetrical Configuration
CONFlGUfU4TlONS
DESIGN
FEATURES
Automatic Priority Switching
The
, .\
’ \
\
/*
I
/
,
I
I’
/
20Hz
The standard way to divide up the frequencies your system reproduces is
to have one speaker pick up exactly where the previous one has left off.
A single crossover frequency is chosen and the response is shaped such
that the subwoofers and the mid-bass drivers are each reproducing half
of the music at
the next. This is the common configuration for most crossovers, despite
the fact that it is
the
.
I
-
106l-k ‘\
,
\
\
200Hz
crossover point, for a smooth transition from one
ohen
inappropriate for the automotive environment.
PkHz
I
POkHz
ta
Asymmetrical Staggered Configuration
75Hz 15Oliz
I
1’;
I
’
\
\
I’
20Hz 200Hz
Great improvements in system definition and
by making the high-pass and low-pass sections of the crossover independent of one another. This is because most cars have a mid-bass “res-
onance” somewhere between 75 and 180 Hz, meaning that those
frequencies are unnaturally emphasized by the car itself. This gives a
muddy,
boomy
sound to an otherwise excellent system. But this resonant
peak in the car’s response can be eliminated by deliberately leaving a
gap between the subwoofer’s range and the mnge in which the rest of
the speakers operate. This creates a precise “dip” in the response of the
system which compensates for the car’s “peak,” restoring accurate,
uncolored sound.
DX7 can accept both high level
level) inputs, and will automatically switch from one to the other without
user intervention. This capability allows the use of the existing
installed radio with an aftermarket source (a CD changer, for example).
The DX7 will mute the input from the factory radio when it senses an
2
I
2kHz
clariIy
are made possible
(speaker
level) and low level (line
I
20kHz
factory-
input from the CD changer, and will revert to the mdio automatically a
few seconds after the CD changer has been turned off.
Remote Control Source Switching
If your CD changer (or other aftermarket
control output, it can be connected ta the “Control In” input on the DX7
for switching between sources. In this mode, the DX7 will switch to the
Low Level input when it senses that the CD changer has been turned on,
and, in a few
Level input) when the CD changer or other aftermarket source is turned
off. After you have turned off the Low Level input (CD changer or other
aftermarket source) the DX7 will take a few seconds to automatically
revert to the High Level input when the Low Level input has been
switched off.
Input and Output
A full complement of input and output level controls is provided to allow
proper matching and tuning of the system. Input level controls for both
High Level and Low Level inputs can be used to match the relative volumes of the two sources, avoiding the abrupt (and potentially dangerous) changes in volume which sometimes occur when switching between
sources in less sophisticated systems. Output level controls for all chan-
nels compensate for differences in amplifier and speaker sensitivity, so
that appropriate Front-Rear and Left-Right balance can be obtained with
both the Fader and the Balance controls of the
position. This guarantees the maximum range of these controls during
everyday use.
seconds,
will revert to the factory-installed unit (at the High
level
Controls
saurce)
has a remote turn-on
xxlrces
set to their neutral
Summed Center Channel Output
A summed center channel output is provided on the DX7 which elimi-
nates the “hole-in-the-middle” effect common to many car stereo instal-
lations. This undesirable effect is the result of our close proximity to the
front speakers and the constraints on their placement in an automotive
environment. By placing a center-channel speaker in the middle of the
dash and using this output to drive its amplifier, a more satisfying, convincing front image is created. The effect works equally well for both
front-seat passengers, often eliminating the everyday use of the balance
control.
The DX7 also incorporates an independent high-pass filter which is con-
tinuously variable from
extra measure of control gives the installer the ability to determine the
effect of the center channel speaker, ranging from merely adding some
additional “air” and sparkle to the sound, to providing a full center
image for female
300-1000
vocalisk.
Hz, with a 6
da/octave
slope. This
Amplifier Turn-On Delay
The remote turn-on lead (sometimes called an “amplifier lead”) from your
source unit should be attached to the Remote Input on the DX7 and can
be used in either of two ways. If
nected to both the DX7 and the amplifier(s) in parallel, all units will
the
signal from the remote lead is con-
3
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