Rainbow KW 4V8 User manual

Installation Manual for
Analog Audiokraftwerk Amplifier
KW 4V8 4-Channel Preamplifier Part-No. 271029
Please read installation manual carefully before beginning installation!
RAC GmbH & Co. KG - P.O. Box 12 25 - 74899 Bad Rappenau - Germany
Telephone +49 -7066 / 9006 0 - Telefax 07066 / 9006 50

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User Safety Notice
Please read all warnings in this manual. They inform you of possible risk of personal injury and damage to
property!
These products are intended for use only by those possessing the necessary specialized training. The
relevant safety regulations regarding auto parts, regulations on internal vehicle safety STVZO-TÜV, as well
as regulations of the authorized vehicle manufacturers should be diligently followed.
Hearing Impairment
Sustained volumes in excess of 85 dB can, over time, impair hearing ability. Rainbow® amplifiers are capable of
producing volume levels of over 85 dB.
Volume and Driver Awareness
Use of musical devices can obstruct important traffic noises, thus posing an increased risk of accident while
driving.
Rainbow® does not take responsibility for hearing impairment, injury, or damage to property arising from the use
or mis-use of its products.
Work to Vehicle
Do not begin operation of vehicle before all components of the loudspeaker system and the amplifier are firmly and
securely in place. Many parts, when unsecured, can become airborne and hazardous during sudden braking or in
the event of an accident.
Do not bore or screw into vehicle lining or carpet before making certain that no important parts or cables lie
beneath. Pay close attention to avoiding gasoline, brake, and oil lines and electrical cables when planning the
assembly.
Before beginning assembly, disconnect the negative terminal (-) of the car battery to avoid possible short-circuits.
Should any part of the autobody require cutting or removal during assembly of the loudspeakers and amplifier,
contact an autobody shop.
Damage to basic auto body parts can void the vehicle operating permit!
Use caution when removing inside panellings. Vehicle manufacturers use a diverse range of fastenings that can be
damaged with disassembly.
!Danger of Eletrical Shock!
Do NOT disturb the amplifier or loudspeaker connection during operation!

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Table of Contents KW 4V8
User Safety Notice 4
Technical Data 6
Technical Specifications 6
Front View and Controls 7
„Controls“ 7 Figure 1
Installation 8
Remote Connection 9
Switching On / Control Functions with LED 9
„INPUT“ Connection: Preamplifier 9
Clipping Display 10
Output „LINE OUT“ for Subsequent Amplifiers 10
Amplifier „OUTPUT“ 10
Remote Control 10
Broadband Mode FRONT & REAR 11
Broadband Mode Frequency Response 11 Figure 2
High-pass Mode FRONT & REAR 12
High-pass Mode FRONT Frequency Response 12 Figure 3
High-pass Mode REAR Frequency Response 13 Figure 4
Low-pass Mode REAR 13
Low-pass Mode REAR Frequency Response 14 Figure 5
Bandpass REAR Mode 15
Bandpass REAR Mode Frequency Response 15 Figure 6
Power Provision Indications 16
Determining the „Central Ground“ 16
Principal Connection Diagram 18 Figure 7
Warranty Terms and Conditions 19
This package contains:
-KW 4V8 preamplifier
-Remote control
-Power supply cable
-Remote control cable – black, 5m
-Mounting angle
Dear Valued Customer,
We congratulate you on your purchase of this superior product and thank you for placing your trust in Rainbow.
We have developed this installation manual with consideration to variations in automobile mechanical and
acoustical characteristics. Nevertheless, mistakes can occur. We would greatly appreciate your bringing any
problems you encounter within to our attention.
Sincerely,
Your Rainbow-Team

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Before Beginning KW 4V8
Notice
The installation and adjustment of the amplifiers should be made only by qualified persons.
Read the operating instructions carefully and follow all directions regarding connection and adjustment of the
amplifier.
Warning
Consider all appropriate references in the operating instructions before attaching external devices that do not
belong to the amplifier.
Do not open or attempt to repair the amplifier yourself. When technical service is necessary, rely exclusively on
your dealer. Any unauthorized changes to the amplifier will void the warranty.
Installation
Warning
The amplifiers are designed exclusively for the vehicle interior and 12 Volt DC electrical current. The ambient
temperature may range from 0° to 60°C.
Install the amplifier only in the car interior or trunk. Do not install the amplifier in the engine compartment.
The amplifier should not be placed under pressure or covered.
Make certain that no foreign particles or moisture can get into the amplifier. Ensure there is sufficient ventilation
for the proper cooling of the housing.
Attachment
Warning
The optimal placement of the amplifier is in a vertical position in an area of the vehicle permitting good air
circulation.
The heatsink can reach temperatures of over 80°C; Avoid contact with heat-sensitive surfaces and materials.
Ensure that no elements that can be damaged by screws or the attachment process are located in the designated
installation area.
Damage to the vechicle can compromise automobile safety and endanger passengers.
Fasten the amplifier to the four mounting straps. Ensure the surface is firm and stable and can withstand the
necessary load. Avoid attachment to plastic parts or paper-based materials.

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Connecting Cables KW 4V8
Warning
Use only electrical cable with a sufficient diameter. For our technical purposes a larger diameter is always
recommended.
The diameter of the grounding cable must be at least as large as that of the positive cable.
Lay the cables one by one and in succession. Pay attention to performing a professional installation. Always use
rubber sleeves for protection when wiring through metal. Use appropriate lugs and insulation caps.
Do not bend the cables at a right angle. Avoid contact with sharp metal or surfaces that could damage the
insulation.
Connecting Cables
Warning
Separate the clamps of the current supply from the battery before maintenance, assembly, or disassembly. In all
cases at least the negative pole should be detached.
Always install a fuse at the positive current supply cable of the battery and as near as possible to the battery clamp.
When possible use the included fuse.
Always follow the accompanying instructions when connecting an external condenser.
We do not accept responsibility for damage caused by the inappropriate use of an external power supply.
Connecting and Installing
Warning
Make sure that the grounding connection is sound. Attach the cable to a metal part of the vehicle from which the
lacquer or other surface finish has been removed.
Use cables of the appropriate length, keeping them as short as possible.
In order for the anti-interference system to function, the RCA sockets may not come into contact with the metal
enclosure.
Packaging
The amplifier is packaged in a cardboard box designed for its protection. Do not damage the packing and keep it
for later use in case of damage.
Upon receipt of the amplifier make sure that:
1.) The packaging is intact, the contents correspond to the specifications, and the product is in no way damaged.
2.) In the event of missing or damaged parts, please contact your dealer immediately. Refer to both the model and
serial number, which can be found on the underneath of the amplifier.

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Technical Data KW 4V8
•Integrated high level adaptor for direct connection at car radio
•Input sensitivity to 8V
•Mono switche for subwoofer operation
•Infinitely adjustable 24 dB high-pass (front & rear)
•Infinitely adjustable 24 dB lowpass (rear)
•Infinitely adjustable 24 24 dB bandpass (rear)
•Infinitely adjustable phase shifter 0° to 180° (rear)
•Volume and phase adjustable from remote with 5m cable (rear)
•Signal clipping display for left and right channel
•Stereo-ouput for subsequent amplifiers
•Softstart remote muting for suppression of switch-on peaks
•Low power requirements for remote muting electrical circuits.
•High-tech semi-SMD built structure with low coupling wiring
•Interference-proof certified in accordance with E-Norm
Technical Specifications
Total Harmonic Distortion THD+N <0.05 %
Signal-to-Noise Ratio S/N >85 dBA Weighted
Frequency Response –3 dB 10 Hz – 50 kHz
Input Sensitivity Low Level In (Unbalanced) 400 mV – 4 V
Input Sensitivity High Level In (Balanced) 4 V – 8 V
Operating Voltage 11 V - 16 V DC
Softstart-Muting On / Off 1s Delay
Dimensions: W x H x D 196 x 28 x 151 mm
Weight 0,56 kg
e-Approval No. E11 10R-023306
Active Controls:
High-pass / Subsonic (Front) 15 Hz – 5 kHz, 24 dB/Oct.
High-pass / Subsonic (Rear) 15 Hz – 500 Hz, 24 dB/Oct.
Low-pass (Rear) 50 Hz – 5 kHz, 24 dB/Oct.
Phase Shifter (Rear) 0° - 180° Infinitely Variable
Remote Control for Rear (5m Cable) Level and Phase Infinitely Variable

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Front View and Controls KW 4V8
Figure 1: Controls

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1 = Power connection (+) plus only over fuse.
2 = Power connection (–) minus, autobody and/or central ground.
3 = Remote connection for remote signal from CD-radio.
4 = Remote output for amplifier
5 = Remote output for remote
6 = Input „INPUT FRONT“ for signal input from CD-radio
7 = Input „INPUT REAR“ for signal input from CD-radio
8 = Singal output „OUTPUT“ for amplifer to be driven.
9 = Switch for „INPUT“ HIGH = balanced or LOW = unbalanced
10 = Switch for input sensitivity
11 = Switch for high-pass operation FRONT
12 = Switch for high-pass operation REAR
13 = Switch for low-pass operation REAR
14 = Switch for mono operation REAR
15 = „GAIN“ control for adjustment of input sensitivity for „INPUT FRONT“.
16 = Control for cut off frequency high-pass FRONT
17 = Control for cut off frequency high-pass REAR
18 = Control for cut off frequency low-pass REAR
19 = Control for phase shifter REAR
20 = „GAIN“ control for adjustment of input sensitivity „INPUT REAR“
21 = Control function: LED red = preamplifier in operation
22 = LED-display for clipping FRONT / REAR channels
23 = Signal output „LINE OUT“ for subsequent amplifiers
Installation KW 4V8
Fasten amplifier to a suitable, well-ventilated location in the vehicle, if possible to the auto body, with included
sheet metal screws and insulated washers.
Caution: Clamp the negative pole of the battery before working on connections. This work requires expertise
and should be performed with careful consideration to the relevant safety regulations.
Attach red cable with minimal diameter of 1 to 1.5 mm2 directly to the positive terminal (+) of the battery or the
central positive point of the HiFi unit and run to the amplifier. Make absolutely certain that the main electrical
cable is secured with a safety cable (see below).
Connect the free end of this power cable to the red “12V” cable (1) of the preamplifier by means of a luster
terminal.
Connect black cable with small diameter of 1 to 1.5 mm2directly to the autobody or to the central ground of the
HiFi unit and connect to the black cable “GND” (2) of the preamplifier by means of a luster terminal.
The total electrical consumption of the complete audio system must be calculated to determine the appropriate fuse
to be employed. Therefore, the total electrical requirements of each audio device must be considered. Review
manufacturers data for each individual unit and add together to determine total consumption (include fuses with
Amp data).The resulting sum is the total electrical consumption in ampere and corresponds to the fuse
requirements. The fuse must always be inserted into the main power cable directly behind the battery (+).

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Remote Connection KW 4V8
Run cables with small diameter from the car radio or CD-player-remote terminal to the preamplifier and attach to
the white cable „REM IN“ (3). Lay the blue cable “REM OUT” (4) to the amplifier and connect with the remote
input on the amplifier.
When switching the car radio/CD player on and/or off the amplifier is switched on and/or off over a soft muting
with a time delay of approximately one second.
Switching On / Control Function with LED
The powering on of the preamplifier is indicated by the green LED “PWR” (21). The preamplifier switches on with
a time delay of approximately one second. Uncontrolled motion of the loudspeakers is suppressed by this soft start
when switching on the amplifier.
„INPUT“ Connection: Preamplifier Input
Via RCA Cable from Pre-Out on Car Radio / CD-Player:
The output signal of the car radio/CD playler is fed by means of a RCA cable to RCA sockets „INPUT FRONT“
(6) R (right) and L (left) and „INPUT REAR“ (7) R (right) and L (left). Input volume is regulated by the
Potentiometer „GAIN“ (15) for „FRONT“ and Potentiometer „GAIN“ (20) for „REAR“, and the „SENSITIVITY“
(10) switch from 400 mVolt (MAX) to 4 Volt or 8 Volt (MIN). The „LEVEL INPUT“switch (9) should remain on
position „LOW“.
For subwoofer operation the preamplifier can be supplied by only one input signal, „INPUT REAR“ (7)
R (right) or L (left), as preferred. For this the „MONO“ switch (14) should be set to „ON“. This simultaneously
activates the phase shifter. The phase of the „REAR“ channels can be adjusted from 0° to 180° by the
Potentiometer „PHASE“ (19).
Direct from Loudspeaker-Outputs of Car Radio:
The loudspeaker output signal of the car radio is fed by means of a high-level adaptor cable (Art. No. 273031 2m,
273032 5m) at the RCA sockets „INPUT FRONT“ (6) R (right) and L (left) and „INPUT REAR“ (7) R (right) and
L (left). The input volume is adjusted with the Potentiometer „GAIN“ (15) for „FRONT“ and Potentiometer
„GAIN“ (20) for „REAR“ and the „SENSITIVITY“ (10) switch from 400 mVolt (MAX) to 4 Volt or 8 Volt
(MIN). The „LEVEL INPUT“ switch (9) must remain on the „HIGH“ setting.
Caution: Use of different RCA cable lengths could potentially lead to potential differences. A variation in
lengths can cause a ground loop, resulting in unpleasant generator distortion. Do not lay RCA cables
parallel with power cables, in order to prevent distortion couplings.

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Clipping LED Display KW 4V8
The red LEDs "FRONT" (22) and "REAR" (22) signal whether the inputs on the pre-amplifier have been
overloaded. If one or both of the LEDs lights up or flickers the "INPUT FRONT" and/or "INPUT REAR" is
overloaded. In this case the level can be adjusted with the potentiometer "GAIN" (15) for "INPUT FRONT" and/or
"GAIN" (20) for "INPUT REAR". Sensitivity can be raised to 8 V by setting the switch "SENSITIVITY" (10) to
the position "8V".
Caution: Prolonged overloading of the preamplifiers can damage or even destroy the loudspeaker, in particular
the tweeter, connected to the amplifier. Avoid overloading of the preamplifiers at all costs.
„LINE OUT“: Subsequent Amplifier Output
The unmodified input signal from „INPUT FRONT“ (6) R & L is free at outputs „LINE OUT“ (23) R (right) and L
(left) and can be used for subsequent amplifiers.
„OUTPUT“: Amplifier Output
The amplifier over which the KW 4V8 preamplifier is to be fed is connected by means of a RCA cable over the
outputs "OUTPUT" (8) F.RCH (front right), F.LCH (front left), R.RCH (rear right) and R.LCH (rear left)
Additionally the respective RCA socket “OUTPUT” must be connected by means of a RCA cable to the respective
input of the amplifier.
„REMOTE“ Remote Control
Connect the included 5m black cable with one end of the included remote control and insert the other end of the
cable into the designated socket „REMOTE“ (5) on the KW 4V8 amplifier. Phase and volume can now be
controlled remotely with the potentiometers „GAIN“ and „PHASE”.
Caution: The settings remain in effect only while the remote control is plugged in. If the remote control is
unplugged, the settings on the potentiometers „GAIN“ (20) and „PHASE“ (19) of the REAR channels
of the preamplifier take effect. If the remote control is again plugged in, the settings of the remote
control once more take effect.

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Operation Mode: Broadband FRONT &
REAR
KW 4V8
In this mode of operation all linear frequencies from 10 Hz to 50 kHz are processed and amplified without
preference. Frequency separation takes place exclusively in the passive crossovers of the respective loudspeaker
systems. This mode of operation is therefore suitable for all kinds of loudspeakers and loudspeaker systems in
which frequency separation occurs via passive crossovers.
•Set „HPF“ (11) switch FRONT to „OFF“ in order to receive a broadband signal on the front channels.
•Set „HPF“ (12) and „LPF“ (13) switches REAR to „OFF“ in order to receive a broadband signal on the rear
channels.
Figure 2: Frequency Response for FRONT or REAR Channels in Broadband Mode

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Operation Mode: Highpass FRONT & REAR KW 4V8
This mode is used principally for kickbass operation of a front system or as subsonic filter for the bass load throw-
off of a front system. The maximum load of the kickbass loudspeakers can be substantially increased in this mode.
The high-pass, with 60-70 Hz and 24 dB slope per octave, removes frequencies below 60-70 Hz, which are
superfluous and harmful to the kickbass loudspeaker, thereby significantly improving the performance and lifespan
of the speaker. The kickbass performance of the loudspeaker is in no way reduced, but rather, the capabilities are
improved. Additionally the loudspeaker thermal and mechanical capabilities are strengthened.
•Switch „HPF“ (11) should be adjusted to setting „x1“ (1 time) or „x10“ (10 times) and the cut off frequency
should be set by means of the potentiometer „HPF“ (16) to between 15 Hz – 500 Hz and/or 150 Hz – 5 kHz on
the FRONT channels.
•Switch „HPF“ (12) should be adjusted to setting „x1“ (1 time) or „x10“ (10 times) and the cut off frequency
should be set by means of the potentiometer „HPF“ (17) to between 15 Hz – 500 Hz on the REAR channels.
In this setting, as described above, all frequencies below 60-70 Hz are removed with large slope from the
loudspeaker and therefore cannot be reproduced. Only the frequencies from 60-70 Hz to 50 kHz are fully available.
Therefore, in this mode a separate amplified subwoofer, which reproduces all frequencies below 60-70 Hz is
absolutely necessary.
Figure 3: Frequency Response of High-pass FRONT Operation Mode

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Figure 4: Frequency Response of High-pass REAR Operation Mode:
Operation Mode: Lowpass REAR KW 4V8
This mode of operation is used exclusively when the amplifier is assigned to subwoofer mode. The internal active
crossover allows only frequencies under the cut-off frequency of 24 dB slope per octave to pass. A low decoupling
frequency of <100 Hz has the advantage that a subwoofer, which is usually installed in the trunk, no longer stands
out, but rather blends into the complete sound picture.
•Set switch „LPF“ (13) to „x1“ (1 time) or „x10“ (10 times ) and, using the potentiometer, adjust the cut off
frequency „LPF“ (18) to between 50 Hz – 500 Hz and/or 500 Hz – 5 kHz for the REAR channels.
Adjust level of subwoofer with controller „GAIN“ (20).
The phase position of the subwoofers should be checked against the basis system after start-up of the complete
system. The phase position is correct when the deep bass rendition is short and dry. Spongey and weak deep bass
rendition indicates phase errors. The phase position of the subwoofers can be changed by adjusting the
potentiometer „PHASE“ (19). Adjust settings on the „PHASE“-controller (19) until the bass rendition is optimal.
Caution: The phase shifter functions only when the „MONO“ switch (14) is in the „ON“ position and affects
only the REAR channels.
TIP: Insert the included remote control for „GAIN“ and „PHASE“ in the „REMOTE“ (5) socket and,
from the driver’s seat, adjust „GAIN“ and „PHASE“ until the bass rendition is optimal. The remote
affects only the REAR channels.

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TIP: Accompany pure subwoofer operation with high-pass with a cut off frequency of 20-30 Hz. This
increases the power handling and lifespan of the amplifiers and subwoofers!
Many subwoofers cannot correctly render frequencies below 30 Hz, producing instead hot air
without volume. The subwoofer should be protected from these frequencies to increase the lifespan of
the subwoofer and amplifier by preventing unnecessary load.
In choosing a subwoofer, the load of the amplifiers must be suitable for the load limits of the subwoofer.
This precaution prevents a premature distortion in the bass range and thermal overloading of the output
stage.
Recommendation for KW 4150: A 2Ω(no bridge operation possible), 4Ω, or 8Ωsubwoofer with a maximum
diameter of 300 mm ensures optimal impulse response during pumping bass rendition. This combination performs
without difficulty at the output stage, even when high bass requirements are placed on the subwoofer.
Figure 5: Frequency Response of Low-pass REAR Operation Mode:

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Operation Mode: Bandpass REAR KW 4V8
This mode of operation is used only when the amplifier is intended for mid-range use, as an amplifier for additional
kick-bass in the door or kick panel (see brochure „KickBass Forever“), or in subwoofer mode as low-pass with
subsonic.
•Set switch „HPF“ (12) to „x1“ (1 time) or „x10“ (10 times) and cut off frequency of the highpass (frequency
from which the loudspeaker should play) „HPF“ (17) to between 15 Hz – 500 Hz and/or 150 Hz – 5 kHz for the
REAR channels by means of a potentiometer.
•Set switch „LPF“ (13) to „x1“ (1 time) or „x10“ (10 times) and low-pass cut off frequency (frequency at which
the loudspeaker should no longer play) by means of a potentiometer „LPF“ (18) to between 50 Hz – 500 Hz
and/or 500 Hz – 5 kHz for the REAR channels.
Figure 6: Frequency Response of Bandpass REAR ) Operation Mode (Typical SubwooferBandpass)

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Power Provision Indications KW 4V8
In order to prevent variations in voltage and ground loops, the same cable diameter must be used for the negative
conductor (-) as for the positive conductor (+). Because of the potential for variation, the auto body is not
appropriate as the negative pole in this application.
In order to prevent distortion, all audio devices must be attached to a central ground. This can be determined
during installation in accordance with the type of vehicle. A direct connection at the negative terminal of the
battery is not always advantageous because of the possibility of technical failure. For this reason, select the engine
block or search for a minimal disturbance on the autobody and from this point supply all devices with the negative
conductor (–) (use multiplier).
The same criteria apply for the positive terminal (+). The battery lines must be placed on a multiplier to avoid
distortion loops. All audio devices (including radio and CD player) as well as memory lines are supplied with
current from this point.
If, for reasons of interference suppression, the positive (+) current supply must be filtered, then only one filter
choke with appropriate total maximum capacity should be placed into the (+) main line (consider total value of
current of all devices). Additional filters in individual device plus supplies worsen the screening effect.
With high rendition volumes, especially in the bass range, the amplifier can distort when long cable lengths cause a
premature voltage drop. This can be prevented by using a cable with a large diameter and minimizing the transition
resistance at the connection points. Appropriate precautions can be taken by using low-loss battery clamps and a
multiplier during the first installation.
With insufficient cable diameter or large requirements of electrical current within the impulse range of the bass
rendition or by active operation of more than one amplifier, an additional buffer condenser can help to improve the
clippings. This supplies sufficient current in the millisecond range through high capacity (~1F/20V) and allows for
additional screening and levelling of current supply. The assembly is performed directly at the amplifier or
multiplier.
Determining the „Central Ground“
nCompletely install and check system.
oProvisionally make the minus (–) connection of the audio system on the auto body minus (Point 1).
If the potential equalization line is not available, shift from the generator housing to Point 1.
pPower on system, insert an empty cassette or CD (0dB-track) and set volume to the minimum level.
qStart the engine and place all electricity consuming devices into operation, including lights, windshield
defrosters, and blowers.
ªIf the revving of the engine creates whistling distortion that becomes more or less frequent during
revving, the ground connection must be corrected.
rRemove antenna plugs from car radio. If the distortion disappears there is a potential distortion at „antenna
ground to battery”.
ªRemedy: Insert galvanic isolated separation filters into the antenna cable. (Art. No. 251001/251055).

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If the distortion continues, proceed as follows:
sClamp the negative conductors (–) at Point 1 of the audio system and attach to engine block.
ªCheck to see if the problem has been repaired.
tIf this does not repair the problem, the auto body must be scanned, while the engine is running, with the
negative conductor of the system until a clear reduction in distortion occurs.
ªFree this point (= Point 2) and remove remaining underneath protection.
uPlace screw with a large diameter on this point. Clear the area on the auto body around the screw and protect
with auto body grease.
vAttach all grounding cables or set multiplier on this screw and run to all devices. (central ground).
wAny remaining distortion can be corrected with an LC-filter on the positive cable.
A mill voltmeter (smallest voltage drop ) or milliohm meter (slightest resistance) can also be used to determine the
central ground. The engine block or Point 1 should always be the point of reference.
Digital electronics in the vehicle cause an audible distortion up to the GHz range (interference from wireless
reception and car telephones). The switching power supplies of the amplifiers, digital tuner, and CD player likewise
contribute heavily to the current contamination. All of the distortion spectra appear in the supply lines and are
partially processed in the amplifier output stage. This results in a veiled sound in the high tone range. Output is
already heated in the no-load operation or in the smallest capacity range by high-frequency distortion. The
preliminary input stage of the amplifier cannot differentiate between music and distortion and therefore faithfully
amplifies everything that presents itself at the „pre-in“/or current input. In order to dampen this effect, the
optimum is realized at the output stage during the manufacturing process. This is documented by the EU type
approval, whereby test specimens are examined for irradiating distortion and for self-produced distortion. Only
after adherence to the EMD limit values is an E-No. assigned. For the reasons mentioned, the frequency range of
the output stage should drop by at least 50 kHz in order to avoid unnecessary heating. With output stages in Class
A or preamplifiers in Class A higher bias current in the low capacity range makes heating unavoidable and should
not be confused with the described influence of distortion.
The removal of the distortion can only be accomplished through specific measures and requires extensive expertise
in the area of filtering technology for proper installation of the system. Important and useful suggestions regarding
this can be found in the relevant technical literature. Attention to the basic rules for laying cables, central grounding
and filtering of the current feed allows a good basic filtering to be presupposed based on use of quality RCA cable.
Special screening problems, which can vary depending upon vehicle type, must be repaired according to each
individual case directly by the particular specialist.

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Figure 7: Principal Cable Diagram

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Warranty Terms and Conditions KW 4V8
With this consumer warranty RAC GmbH & Co. KG in Bad Rappenau, Germany, ensures on the product, starting
from the time of the first use and/or the first installation by the authorized specialized trade, a two-year materials
and labor warranty.
The warranty is exclusively limited to free substitution of defective parts, whose cause is faulty construction or
material defects, as well as to the warranty repair.
A warranty claim does not exist if defects resulted from inappropriate assembly, transport damage, mechanical
damage, or foreign interference.
Accidents, forces of nature or other causes which can be answered for, in particular water and fire, are not subject
to the guaranteeing of Rainbow®.
Version: MSJ/1.2 - 04/06
This document is protected by copyright. Any duplication, including printing , in whole or part , and all reproductions of
diagrams, also in a modified version, is permissible only with the written permission of Rainbow.
Copyright © 2005 by RAC GmbH & Co. KG. Rainbow is a registered trademark.