XETEC GRAVITY MK2 Series User manual

XETEC GRAVITY MK2 SERIES 4G-300/4G-600
Congratulations for buying this XETEC product and thank you for your
confidence!With this XETEC amplifier you have purchased an innovative
and professional 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 tech-
tips and technical support for you.
The XETEC 4G-300/4G-600 is a state-of-the-art 4-channel car audio
amplifier,especiallydevelopedfor top quality speakersystemsandsubwoofers.
A perfect choice are the XETEC Component systems and subwoofers.
You can also run each 2 of the 4 channels in bridged mode to gain more
than twice the output power,in order to drive subwoofers,midbasses or
high power component systems.
The versatility and many adjustment options make the 4G-300/4G-600
an allround genius for car music reproduction.
SPECIAL FEATURES
4G-300 – State-of-the-art Analog 4-channel Amplifier
•alu-magnesium diecast heatsink
•4x70W
•2Ohms stable
•Bridged mode:2x200W
•HPAA technology
•TOP control (all controls accessible under top plate cover)
•Highpass,Lowpass and BandpassVCVS (=Voltage Controlled
Voltage Source) filters for front and rear channels with bypass function
•Balanced RCA inputs for maximum noise suppression
•Input sensitivity 250 mV - 6V
•Optional carEQ module (car-specific EQ module to eliminate your car's
acoustic problems)
•Full protection (DC,Overheat,Shortcircuit, Overload)
•Gold plated input terminals
4G-600 – State-of-the-art Analog 4-channel Amplifier
•alu-magnesium diecast heatsink
•4x180W
•2Ohms stable
•Bridged mode:2x380W
•HPAA technology
•TOP control (all controls accessible under top plate cover)
•Highpass,Lowpass and BandpassVCVS (=Voltage ControlledVoltage
Source) filters for front and rear channels with bypass function
•Balanced RCA inputs for maximum noise suppression
•Input sensitivity 250 mV - 6V
•Optional car-EQ module (car-specific EQ module to eliminate your car's
acoustic problems)
•Full protection (DC,Overheat,Shortcircuit, Overload)
•Gold plated input terminals
PROPERTIES
•Independent high and lowpass filters can be configured either as
highpass,lowpass or bandpass filters and combinations out of these
three options.
•Each 2 channels can be run in bridged mode for higher output power
•4-ch mode Highpass: drives 4 satellite speakers
•4-ch mode Bandpass: drives 4 (or more) midbasses
•4-ch mode Lowpass: drives 4 (or more) subwoofers
•2-ch mode Lowpass: drives 2 subwoofers in bridged mode
•2-ch mode Bandpass: drives2(ormore)midbassesinbridged mode
•Optional car-EQ module (car-specific parametric equalizer module)
(see chapter 5.„car-EQ ") Protection circuit:Overload,Short-circuit,
DC,Overheat
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!).
•Please note that a minimum speaker impedance of 2 Ohms
must be maintained.
Do not connect speakers with lower impedance in normal as
well as in bridged mode!
•Make sure that you do not use defective speakers and
subwoofers.They can cause damage to your amplifier!
1

a distance to power cables and the vehicle´s factory wires to avoid induction
of noise.
1.2 Now the speaker wires must be connected to the respective speaker
terminals.Pleasemakesuretousespeakers with the correct impedance!
Also make sure to connect all speakers with correct polarity to avoid
phase problems which can spoil the sound of the whole system.
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 (-).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
requirements 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!
Now you can reconnect the battery and insert the main fuse into the power
cable´s fuse holder.
CAUTION: Both, the +12V and the ground cable, must have
sufficient diameter!
XETEC proposes the following minimum gauges:
Total output power of the system:
Up to 100W: 6 mm Up to 1000W: 35 mm
Up to 250W: 8 mm Up to 1200W: 40 mm
Up to 500W: 10 mm More than 1200W: 50 mm
Up to 750W: 25 mm
Weaker Cables will reduce the performance of your system significantly,
and may cause damage to your amplifiers.Weak cables also will heat-up!
CAUTION
Always replace fuses with same value. Higher values may cause
damage to your amplifier, battery or car!
The fuses inside the amplifier only protects the device itself,not the battery
and the car!
IMPORTANT NOTICE: STABILITY OF AMPLIFIERS
Normal operation:
Every amplifier is only capable of driving loads (speakers) up to a certain
limit, which is set either by the protection circuits or the maximum power
output.XETEC amplifiers accept loads down to 2 Ohms in normal operation.
Bridged mode:
In bridged mode each two channels of the amplifier are driving the same
load, the acceptable impedance for each channel is also divided by two!
That means:
A normal amplifier „sees" 4 Ohms as 4 Ohms.In a bridged amplifier, each
amplifier „sees" 2 Ohms only!!!That´s why in bridged mode always 4 Ohms
must be maintained although the amplifier might be 2-Ohms stable.
CAUTION
This product is capable of conducting very high sound pressure
levels,and can thus be harmful to your health.Prolonged exposure
to high volume levels can cause hearing loss!
Please use restraint on the volume control. XETEC wants you to
enjoy your amplifier for a long time to come, and we do not take
responsibility for hearing loss nor other health problems.
0. INSTALLATION
For safety reasons, the amplifier 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. 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 amplifier.Always run signal cables in
2
22
2
2
2
2
2

3