Page 1
SOUNDSTREAM
Parametric Equalizer
Owner's Manual
and
Installation Guide
Page 2
1.
CONGRATULATIONS
Congratulations for buying this Sound Stream product
and thank you for your confidence!
With this Sound Stream Equalizer you have purchased
.n innovative and professional high-end product, which
+
ill enable you to enjoy your music on a very high quality
level for many years.
We have especially focused on electronic as well as
product design to give you a product that will accompany
you for
ahead and will still be modern for many years.
Sound Stream products represent the experience our
engineers have made through many years assisted by
car audio magazines as well as professional installers.
Please read these instructions very carefully, to avoid
unnecessary trouble and defects.
In case of trouble, please contact your local dealer or
check our
shooting. There we also offer up-to-dates hints and
technical support for you.
-adjustments for your car model. Using these adjustments,
you do not need any additional measurements.
The SOUND STREAM PQ-7 is a state-of-the-art 6-channel
/
of resonances and peaks caused by the car's geometry
itself.
niany years, as our products are always one step
website www.soundstream.com for trouble
ur website www.soundstream.com offers many ptimized
7-band car audio equalizer, engineered for the correction
So, even the best speaker is not able to reproduce music
as it was, since the car's own sound is always added to
the music. By filtering this garbage out, the sound becomes
more clear, precise and more hi-fi.
-
TIPS FOR MEASUREMENTS
If you want to go one step further, optimizing the whole system
including Radio, amplifier, speakers and car acoustics, you
have to take measurements with professional equipment,
like computer
Analyzers being capable of conducting an average curve out
of many single plots in order to take measurements in several
positions. The microphone should be moved slowly from the
left ear towards the nose and then to the right ear while about
30
single measurements are taken. This way, you will get a
real average curve ensuring not to hit a point which is not
representative at all.
SAFETY
Before you make any conneetion, the battery must be
disconnected!
A
main fuse must be installed into the +12V wire within
+the first 12 from the +terminal of the battery
(insurance regulation!).
The fuse in the power line only protects the device itself,
not the battery and the car!
RTA(Real Time Analyzers). We recommend
u
The PQ-7 is not meant to be used as sound control like
bass and treble controls. That makes no sense and will
only strain the amplifier and speakers.
Additionally, the PQ-7 is equipped with a subsonic filter
and a phase shifter to reduce very low frequencies and
to correct the phase of the subwoofer in relation to the
other speakers.
Resonances and peaks caused by the car's own
,eometry cause distortions of the frequency response of
le whole sound-system which lead to a dirty and boomy
'-or aggressive, colorated sound, or both.
INSTALLATION
For safety reasons, the equalizer has to be mounted properly
and fixed to the car's body. Please fix the device using the
screws that some with your product. Be careful when drilling
holes, there might be wires, fuel lines or the gas tank behind
a wall! Never drill holes when you do not know what's behind.
Never install signal wires close to power cables to avoid
and alternator noise is being induced.
huln
w
Page 3
1.
CONNECTIONS
Before you make any connections, always disconnected
the battery!
1
.I
First of all, connect the RCAcables coming from the
radio1 head unit to the respective inputs of your
Always run signal cables in a distance to power cables
-
and the vehicles's factory wires to avoid induction of
noise.
1.2 The RCAsignal cables to the amplifier are now conÂnected to the
1.3 Next step is the ground connection. Check for a good
grounding point using your vehicle's chassis. Make sure
that this point has good electrical contact! Some parts
of
the chassis might only be glued and have no contact
to battery
this point to avoid alternator whine and other noise.
1.4 As the next connection the +12V cable has to be
,
connected to the
careful not to run this cable around sharp edges, the
insulation might be damaged. For holes always use
grommets!
PQ-7
respective outputs.
(-).
Run all ground cables of the system to
(+)
terminal of the battery. Always be
PQ-7.
arametric Equalizer
1 Gain adjust
2 Q-adjust (bandwidth)
3 Frequency adjust
4 Phase adjust
5
SubsonicQ 11 +I 2V (always use in-line fuse
(subwoofer channel)
6 Subsonic frequency
3.
OPERATION
7
Balanced line inputs (front, rear, sub)
8
Line outputs (front, rear, sub)
9
Remote terminal
10 GND (ground)
in 12 V cable!)
12 Blue power ON LED
Always use an in-line fuse in the
12
max.
meet the current requirements of the whole sound
system, minimum value is
1.5 The last connection is the remote wire. The headunit
1.6 Now you can reconnect the battery and insert the main
2.
from the battery's + terminal (value must
must always be turned off during this connection, as it
might be damaged when remote output is shorted to
ground!
fuse into the power cable's fuse holder.
COTROLS
60
A).
+12V
power cable in
3.1 Turn on the radio at low volume.
3.2 Adjust all Gain controls in exact mid position, all
controls to minimum.
Insert a CD with pink noise to your CD player.
3.3
Take the first measurement of the frequency response,
3.4
and save the resulting curve.
Look for significant peaks and dips in the plot. Try to
3.5
compensate them by turning up the respective Gain
then frequency, and
Do not correct dips and peaks with too narrow bandwidth
You can also download a specific adjustment from our
3.6
website www.soundstream.com. This way you do not
need to take measurements, since our engineers
already have done this for you. Just adjust
as shown in the figure and your sound system will be
perfectly optimized.
,,Q .
al controls
Q
Page 4
TECHNICAL DATA
Parametric 6-cgabekl7-band equalizer
All bands:
Front channels
'
'I
Center freq, I. band 100 Hz (35 350 Hz)
+ - 10 dB adj. Range. Q=0.5 20
EQ
frequencies:
Center freq. 2. band 300 Hz (1 00 11 00 Hz)
Center freq. 3. band 1000 Hz (350 3000 Hz)
Center freq. 4. band 4800 Hz (1700 16000 Hz)
Rear channels EQ frequencies:
Center freq. 2. band 300 Hz (100 1000 Hz)
Center freq. 3. band 1000 Hz (350 3300 Hz)
Subwoofer channels EQ frequencies:
Center freq.
1.
band 60 Hz (20 180 Hz)
Switchable subsonic filter,lO-80 Hz 12 dB
Phase adjust 0 deg.- 180 deg
Balanced inputs for noise reduction. Switch Mode Power Supply (SMPS)
Dimensions: 257 x 102 x 47 mm (Mountingplate 265 x 145 mm)
Page 5
1. Parametric EQ: f=l000Hz; Q=0,5; G=t8dB
4.
Parametric EQ: f=1000Hz; Q=20; G=t8dB 5. Parametric EQ: f=l000Hz; Q=20; G=t8dB
on,*
T.,>,
AbO"?.
Tlmo
17-08-00
I1
2. Parametric EQ: f=1000Hz; Q=1,0; G=t8dB
I
s5
41
3.
Parametric EQ: f=l000Hz; Q=5,0; G=t8dB
6.
Subsonic filter: 10Hz; Q=0,5
r*.,
About
D","
*,.O~.OO
Tim"
11
60 .>
7.
Subsonic filter: 50Hz ; Q=0,5
re.,
Aha",
Onlo
Tams
27-00-00
I I
$5
8. Subsonic filter: 50Hz ; Q=1,0
T.,Sl
A,,-",
4
I
Oaln
Terno
27-08-00
11
ZJ
9.
Subsonic filter: 50Hz; Q=l
T*S,
ADO",
11
,I
Oslo
21-08-00
Tan,..
,>
3,
11
Page 6
1.
Parametric
TO",
A\,O",
4.
Parametric
EQ: f=1000Hz; Q=0,5;
EQ: f=1000Hz; Q=20;
G=+8dB
G=t8dB
D"f0
TCme
2.
Parametric
27
08
00
99
55
",
EQ: f=1000Hz; Q=1 ,O;
G=+8dB
3.
Parametric
EQ: f=1000Hz; Q=5,0;
G=+8dB
Loading...