XETEC GRAVITY Series User manual

Designed for car audio
enthusiasts, who do not
compromise in terms of
sound quality,
design, versatility as well
as reliability. Enjoyable
state-of-the-art.
XETEC design group GmbH
Wiggenbrink7/Kirchstrasse·59494Soest-Meiningsen Tel. +49 / 29 21 / 590-111-0 . www.xetec.de

XETEC GRAVITY SERIES PARAQ-7
Congratulations for buying this XETEC product and thank you for your
confidence!
Withthis XETEC equalizeryouhave purchased aninnovativeandprofessional
high-end product,which will 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 many years,as our products
are always one step ahead and will still be modern for many years.
Xetec 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 website
www.xetec.de for troubleshooting.There we also offer up-to-date hints
and technical support for you.
Our website www.xetec.de (accessories/ParaQ-7/car data collection)
offers many optimized adjustments for your car model. Using these
adjustments, you do not need any additional measurements.
The XETEC ParaQ-7 is a state-of-the-art 6-channel / 7-band car audio
equalizer,engineered for the correction of resonances and peaks caused by
the car´s geometry itself.
The ParaQ-7 is not meant to be used as a sound control like bass and treble
controls.That makes no sense and will only strain the amplifier and speakers.
Additionally, the ParaQ-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 geometry cause distortions
of the frequency response of the whole soundsystem which lead to a dirty
and boomy or aggressive,colorated sound,or both.
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.
A really good hi-fi sound quality is impossible without equalizing.
Amazing results can be achieved this way, even with factory installed
speakers.
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 measure-ments with professionalequipment, like computer RTA
(Real Time Analyzers). We recommend 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 connection, the battery must be
disconnected!
•Amain fuse must be installed into the +12 V 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!
0. 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 come 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 hum and
alternator noise is being induced.
1

INPUTS OUTPUTS GND
REM +12V
1. CONNECTIONS
Before you make any connections,always disconnect the battery!
1.1 First of all, connect the RCA cables coming from the radio/
headunit to the respective inputs of your ParaQ-7. Always run
signal cables in a distance to power cables and the vehicle´s
factory wires to avoid induction of noise.
1.2 The RCA signal cables to the amplifier are now connected to the
ParaQ-7´s respective outputs.
1.3 Next step is the ground connection. Check for a good grounding
point using your vehicle´schassis. Make sure that this point
has good electrical contact ! Some parts of the chassis might
only be glued and have no contact to battery (-). Run all
ground cables of the system to this point to avoid alternator
whine and other noise.
1.4 As the next connection the +12V cable has to be connected to the
(+) terminal of the battery.Always be careful not to run this cable
around sharp edges, the insulation might be damaged. For holes
always use grommets!
Always use an in-line fuse in the +12 V power cable in max. 12"
from the battery´s + terminal (value must meet the current re-
quirements of the whole sound system, minimum value is 60A).
1.5 The last connection is the remote wire.The headunit must always be
turned off during this connection, as it might be damaged when
remote output is shorted to ground!
1.6 Now you can reconnect the battery and insert the main fuse
into the power cable´s fuse holder.
2. CONTROLS
9 11
7 8 10
1 4
212
35
6
1Gain adjust 7 Balanced line inputs (front,rear, sub)
2Q-adjust (bandwidth) 8 Line outputs (front,rear, sub)
3Frequency adjust 9 Remote terminal
4Phase adjust 10 GND (ground)
5Subsonic Q 11 +12V (always use in-line fuse
(subwoofer channel) in 12V cable!)
6Subsonic frequency 12 Blue Power ON LED
3. OPERATION
3.1 Turn on the radio at low volume.
3.2 Adjust all „Gain" controls in exact mid position,
all „Q" controls to minimum.
3.3 Insert a CD with pink noise to your CD player.
3.4 Take the first measurement of the frequency response,
and save the resulting curve.
3.5 Look for significant peaks and dips in the plot.
3.5 Try to compensate them by turning up the respective „Gain",then
frequency, and „Q".
Do not correct dips and peaks with too narrow bandwidth.
3.6 You can also download a specific adjustment from our website
www.xetec.de.This way you do not need to take measure-
ments,since our engineers already have done this for you.
Just adjust all controls as shown in the figure and your
soundsystem will be perfectly optimized.

TECHNICAL DATA
•Parametric 6-channel/7-band equalizer
•all bands:+-10 dB adj. range,Q=0,5...10
•Front channels EQ frequencies:
center freq.1. band 100 Hz (20-150 Hz)
center freq.2. band 500 Hz (100-1000 Hz)
center freq.3. band 1500 Hz (800-3000 Hz)
center freq.4. band 3500 Hz (2000-10000 Hz)
•Rear channels EQ frequencies:
center freq.2. band 500 Hz (100-1000 Hz)
center freq.3. band 1500 Hz (800-3000 Hz)
•Subwoofer channels EQ frequencies:
center freq.1. band 100 Hz (20-150 Hz)
•switchable subsonic filter,10-50 Hz 12 dB
•phase adjust 0 deg.-180 deg.
•Balanced inputs for noise reduction.Switch Mode Power Supply (SMPS)
•Dimensions:208 x 78 x 47 mm (Mountingplate 220 x 120 mm)

1.Parametric EQ:f=1000Hz; Q=0,5;G=+8dB 2.Parametric EQ:f=1000Hz; Q=1,0;G=+8dB 3.Parametric EQ:f=1000Hz; Q=5,0;G=+8dB
4.Parametric EQ:f=1000Hz; Q=20;G=+8dB 5.Parametric EQ:f=1000Hz; Q=20;G=- 8dB 6. Subsonic filter:10Hz;Q=0,5
7.Subsonic filter: 50Hz;Q=0,5 8.Subsonic filter: 50Hz;Q=1,0 9.Subsonic filter: 50Hz,Q=1,1

1.Parametric EQ:f=1000Hz; Q=0,5;G=+8dB 2. Parametric EQ:f=1000Hz;Q=1,0; G=+8dB 3.Parametric EQ:f=1000Hz; Q=5,0;G=+8dB
4.Parametric EQ:f=1000Hz; Q=20;G=+8dB