Installation Manual for iPaul Amplifier
Contents
1. Gee e o Or ie L lt i Power Provision Indications iPaul 2 400 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 sc2. 2 x 2 O possible Connection Impedance Mono Connection Impedance Tri Mode Woofer Satellite 1 x 8 Q 1 x 4 Q possible 1 x 4 Q 2 x 4 Q Tri Mode Damping Factor gt 200at4 O Operating Voltage 11 V 16V DC Input Power Max 14 4 V 48 A at 1 THD Input Power Remote 8 mA Idle Input Power without Signal lt 04A Temperature Monitoring heatsink 70 C Power Down Short Circuit Protection Overload Immediate Power Down Softstart Muting On Off ls Delay Dimensions W x H x D 355 x 60 x 250 mm Weight 4 5 Kg e Approval No E11 10R 024085 Active Controls High pass Subsonic 15 Hz 500 Hz 12 dB Oct Low pass 50 Hz 5 kHz 12 dB Oct Band pass 15 Hz 5 kHz 12 dB Oct Phase Shifter 0 180 Infinitely Variable Remote Control 5m Cable Level and Phase Infinitely Variable Front View and Controls Figure 1 Controls 12 7 8 9 10 11 iPaul 2 400 i i HPF BP LPF OdB 12dB FULL 6dB i R REMOTE X OVER BASS BOOST LOW INPUT LINE OUT 4 BRIDGED TH oO nir SPEAKER la olr OUTPUT U CONTROL OUTPUT GAIN PHASE E 180 LPF KE HPF 14 15 16 17 1 Power connection minus body and or central ground 2 Remote connection of CD radio 3 Power connection plus only over fuse 4 Flat fuse 2 x 25A in accordance with DIN standard replaceable from outside Replace only with like kind
3. Connect left channel of the loudspeaker crossover with clamp L 6 Connect left channel of the loudspeaker crossover with clamp L 6 Connect right channel of the loudspeaker crossover with clamp R 6 Connect right channel of the loudspeaker crossover with clamp R 6 Figure 6 Loudspeaker Connection Stereo 4 BRIDGED SPEAKER OUTPUT 16 Loudspeaker Connection Mono Bridge iPaul 2 400 The bridge connection is performed at the clamps L 6 and R 6 with the marking BRIDGED The clamps L and R not used for this mode of operation must not be occupied Connect the plus cable of the loudspeaker at the clamp L 6 and the minus cable with the clamp R 6 Fig 7 The socket INPUT 7 R L must be occupied by a Y RCA cable which will then distribute the signal to both RCA sockets during mono operation The connection impedance of the loudspeakers during mono operation may not fall below 49 in order that the critical minimum connection impedance of 2O is maintained A 2Q loudspeaker connection is not permitted for reasons of thermal power load limitations Note An 8Q loudspeaker impedance on the mono bridge represents a material impedance of about 4O on the amplifier At 4O the material impedance is only around 2Q and at 2Q it is only around 19 The halving of the impedance is achieved through the allocat
4. 5 Connection for external thermostat module optional and fan module optional 6 Loudspeaker connection 7 Input socket LOW INPUT for signal input of CD radio 8 Signal output LINE OUT for subsequent amplifiers 9 Remote output for remote control 10 Switch for high pass or band low pass operation 11 Bass Boost 12 Connection for peak performance coupling module optional 13 Function control blue logo amplifier in operation flashing logo protection mode 14 GAIN control for adjustment of input sensitivity for LOW INPUT 15 Control for phase shifter 16 Control for cut off frequency low pass 17 Control for cut off frequency high pass Installation 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 The amplifier s heatsink can get very hot making sufficient distance to temperature sensitive parts absolutely necessary 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 Before connecting the power supply and loudspeaker cables all screws on the amplifier terminal block must be unscrewed in an upward direction so that the screws do not obstruct the path of the cables Under no circumstances should screws be completely unscrewed h
5. 2 400 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 12 dB slope per octave removes freguencies 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 e Switch X OVER 10 should be adjusted to setting HPF and the cut off frequency should be set by means of the potentiometer HPF 17 to between 15 Hz 500 Hz In this setting as described above all freguencies below 60 70 Hz are removed with large slope from the loudspeaker and therefore cannot be reproduced Only the freguencies from 60 70 Hz to 35 kHz are fully available Therefore in this mode a separate amplified subwoofer which reproduces all freguencies below 60 70 Hz is absolutely necessary Figure 4 Freguency Response of High pass Operation Mode iPaul 2 400 Highpass moquies 10 20 30 40 50 60 80 100 200 300 500 700 1k 2k 3k 4k Sk 6k 8k 10k 20k 30k 50k Hz Op
6. Loudspeaker Connection Stereo 16 16 Figure 6 Loudspeaker Connection Mono Bridged 17 17 Figure 7 Loudspeaker Connection Tri Mode 18 18 Figure 8 Power Provision Indications 19 Determining Central Ground 19 Principal Connection Diagram Central Ground 21 Figure 9 Warranty Terms and Conditions 22 This package contains Paul 2 400 amplifier Mounting screws 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 Before Beginning iPaul 2 400 Notice The installation and adjustment of the amplifiers should be made only by gualified 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 Tnstallation Warning The amplifiers are designed
7. IP 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 iPaul 2 400 A 2O no bridged operation possible 40 or 8Q subwoofer with a maximum diameter of 380 mm 15 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 Band pass Low pass Operation Mode iPaul 2 400 Bandpass Lowpass 135 a m 3 z 130 125 H 1 1 120 f 10 20 30 40 50 60 80 100 200 300 500 700 1k 2k 3k 4k Sk 6k Dk 10k 20k 30k 50k Operation Mode Bandpass This mode of operation is used only when the amplifier is intended for mid range use as an amplifie
8. Installation Manual for iPaul Amplifier iPaul 2 400 2 Channel Amplifier Part No 271050 v roinbow RAC GmbH amp Co KG P O Box 12 25 74899 Bad Rappenau Germany Telephone 49 7066 9006 0 Telefax 49 7066 9006 50 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 T V 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 ma
9. 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 guality 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 20 Figure 6 Principal Central Ground Diagram Head Unit Pre Amp Crossover Power Amp Power Amp Zentraler Pluspunkt Haupt Sicherung Remote Zentraler Massepunkt Verbindung bei Bedarf 21 Warranty Terms and Conditions iPaul 2 400 With this consumer warranty RAC GmbH amp 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 1 07 07 Thi
10. cations 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 Technical Data iPaul 2 400 Performance amplifier with integrated high current MOSFET switch power supply Inverted Output stages for performance coupling during mono bridged mode Output stage 2 O stable bridge and tri mode capable Amplifier design for minimal noise Reversible safety switch off with thermal monitoring Safety switch off with DC current to loudspeakers Safety switch off for loudspeaker short circuit and loudspeaker under impedance Integrated flat fuse 2 x 25 A in accordance with DIN standard replaceable from outside Softstart remote muting for suppression of switch on peaks Low power reguirements for remote muting electrical circuits Palladium plated 25 mm power and 10 mm loudspeaker connection High tech semi SMD built structure with low coupling wiring Interference proof certified by European E Norm Technical Data Output Power Stereo 4 O 2 x 130 Watt rms Output Power Stereo 2 O 2 x 200 Watt rms Output Power Mono 4 Q 1 x 400 Watt rms Total Harmonic Distortions THD N lt 0 04 Yo Signal to Noise Ratio S N gt 95 dBA weighted Frequency Response 3 dB 10 Hz 35 kHz Input Sensitivity Level In 250 mV 6 V Input Impedance Level In 10 kO Connection Impedance Stereo 2 x 4 Q
11. d 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 Remote Connection Run cables with small diameter from the car radio or CD player remote terminal to the amplifier connection REM 2 using a protective cable sleeve 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 amplifier is indicated by the blue light at the unit s logo 13 The amplifier 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 In the event of severe under impedance lt 2Q for example complex load short circuit at the loudspeaker outputs direct current at the loudspeaker voice coils or with overload causing too high temperatures on the heatsink the electronic monitor immediately powers the amplifier off blue flashing logo 13 protection After the repair of the dis
12. eration Mode Low pass iPaul 2 400 This mode of operation is used exclusively when the amplifier is assigned to subwoofer mode The internal active crossover allows only freguencies under the set cut off freguency of 12 dB slope per octave to pass A low decoupling freguency of lt 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 e Set switch X OVER 10 to BP LPF and using the potentiometer adjust the cut off frequency LPF 16 to between 50 Hz 5000 Hz Set the potentiometer HPF 17 all the way left to 15 Hz Adjust level of subwoofer with controller GAIN 14 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 Spongy and weak deep bass rendition indicates phase errors The phase position of the subwoofers can be changed by adjusting the potentiometer PHASE 15 Adjust settings on the PHASE controller 15 until the bass rendition is optimal Caution The phase shifter functions only when the X OVER switch 10 is in the BP LPF position 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 T
13. 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 Connecting Cables iPaul 2 400 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 professio
14. he 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 freguency 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 freguency 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 reguires extensive expertise in the area of filtering technology for proper installation of the system Important and useful suggestions regarding this can
15. ion performed by the mono clamps bridging the two internal amplifiers Figure 7 Loudspeaker Connection Mono Bridged 4 BRIDGED SPEAKER OUTPUT Loudspeaker Connection Tri Mode Stereo Satellite Subwoofer iPaul 2 400 The amplifier is likewise suitable for loudspeaker connection in tri mode and can be used for rear deck systems with subwoofers Fig 8 Attach the rear deck loudspeaker system at the terminals 6 as described in the section Loudspeaker Connection Stereo above Additionally an 8Q or 4Q subwoofer over a passive crossover on the clamps L 6 and R 6 will be attached The mechanical load of the woofer of the rear deck loudspeaker system will fall at low freguencies because of the limits on power handling set by the cone excursion when no security measures for the lower freguency range have been made If the loudspeaker system is operated without additional high pass the total power handling of the system will be determined by the maximum power handling of the loudspeaker system Disadvantages of this circuitry are the decreased channel separation as well as the inability to regulate the subwoofer level The advantage is however in the compactness of the system which is ideal for elevated placement Figure 8 Loudspeaker Connection Tri Mode 5 BRIDGED SPEAKER OUTPUT N V A WA en II J
16. ives the bass rendition an unnatural sound e Set BASS BOOST 11 switch to 6dB or 12dB Figure 2 Cable Diagram Amplifier Radio Loudspeaker ACL 9u9neg ES Piundasse nw Joie 1ndino s gt ll lt s gt lt lt 4 N3 V3dS an me asa umn 114110 1041NOD O Dj O oft allal S2 gsng 8 ji lt gt DI G u GN N3MOd 6 o s y e z DENIGG A EDK 15008 SSV8 p HAAOX na apo SPZL 8PO 441 48 ddH 1N0 ANI L IOW y 5 i oc 11 Operation Mode Broadband iPaul 2 400 In this mode of operation all linear freguencies from 10 Hz to 35 kHz are processed and amplified without preference Freguency 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 freguency separation occurs via passive crossovers e Set X OVER 10 switch to FULL Figure 3 Frequency Response for Broadband Mode FULL setting iPaul 2 400 moque 10 20 30 40 50 60 80 100 200 300 500 700 1k 2k 3k 4k Sk 6k 8k 10k 20k 30k 50k Hz Operation Mode High pass iPaul
17. king 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 Electrical Shock Do NOT disturb the amplifier or loudspeaker connection during operation Table of Contents iPaul 2 400 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 Function with LED 9 Amplifier LOW INPUT 10 Output LINE OUT for Subsequent Amplifiers 10 Remote Control 10 Bass Boost 10 Cable Diagram Amplifier Radio Loudspeaker 11 Figure 2 Broadband Mode 12 Broadband Mode Freguency Response 12 Figure 3 High pass Mode 13 High pass Mode FRONT Freguency Response 13 Figure 4 Low pass Mode 14 Band pass Low pass Mode Freguency Response 15 Figure 5 Bandpass Mode 15
18. nal 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 lacguer 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 specifi
19. owever Caution Important Safety Notice Concerning Risk of Fire and Injury Unscrewing or turning of the screws on the amplifier terminal block during active amplifier operation amplifier is performing is not permitted as the risk of a short circuit between the screwdriver and the heatsink cannot be excluded thus making extreme damage to the amplifier or car or a burn injury caused by the electrical current on the screwdriver unavoidable Drilling out the amplifier terminal block for the purpose of cross section extension for cable insertion can cause damage to the electronics and will result in an immediate voiding of the warranty Attach red cable with diameter of 4 mm to 10 mm 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 fuse see below Provide the free end of the power cable with a protective sleeve and insert into the clamp B 3 of the amplifier Firmly tighten the clamping screw Connect black cable with diameter of 4 mm to 10 mm directly to the autobody or to the central ground of the HiFi unit and run to the amplifier Provide the free end of this power cable with a protective sleeve and insert into the clamp GND 1 of the amplifier Firmly tighten the clamping screw The total electrical consumption of the complete audio system must be calculate
20. puts LINE OUT 8 R right and L left and can be used for subsequent amplifiers 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 9 on the amplifier Phase and volume can now be controlled remotely with the potentiometers GAIN and PHASE Caution The volume GAIN on the remote control can be set between the minimum and the set volume on potentiometer GAIN 14 of the amplifier only It is recommended to set a reasonable basic volume by potentiometer GAIN 14 first and use the remote control for fine tuning afterwards The settings remain in effect only as long as the remote control is plugged in If the remote control is unplugged the settings on the potentiometers GAIN 14 and PHASE 15 of the amplifier take effect If the remote control is again plugged in the settings of the remote control once more take effect Bass Boost For vehicles with high sound absorption bass rendition can be raised from 45 Hz up to 12 dB with the switch BASS BOOST 11 Adjust the bass rise depending on loudspeaker location and listening tastes The correct setting is achieved when the bass rendition has a full dry sound Too strong of a bass rise can with high volumes lead to an overload of the subwoofers A level of 12 dB is equal to 16 times volume load and g
21. r for additional kick bass in the door or kick panel see brochure KickBass Forever or in subwoofer mode as low pass with subsonic e Set switch X OVER 10 to BP LPF and cut off freguency of the highpass freguency from which the loudspeaker should play HPF 17 to between 15 Hz 500 Hz by means of a potentiometer e Set low pass cut off frequency frequency at which the loudspeaker should no longer play by means of potentiometer LPF 16 to between 50 Hz 5000 Hz Loudspeaker Connection Stereo iPaul 2 400 The loudspeaker systems are attached at the terminals 6 which are clearly marked by L and R It is imperative that protective sleeves be provided at cable ends The use of cables with a minimum diameter of 4 mm2 ensures the necessary low impedance with the smallest voltage drop and that a favorable amplifier damping factor remains relatively constant over the entire freguency range During connection of the loudspeaker crossovers to the amplifier it is imperative to pay close attention to like polarity phase balance Switching the polarity phase balance results in the stereo basis and bass rendition being lost through phase cancellation Fig 6 Caution The loudspeaker connections must not come into contact with the autobody The negative connections on the left and right must not be connected with one another Neglecting to follow these precautions can lead to damage of the amplifier
22. reening 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 reguirements 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 leveling of current supply The assembly is performed directly at the amplifier or multiplier Determining the Central Ground Completely install and check system Provisionally make the minus connection of the audio system on the auto body minus Point 1 If the potential egualization line is not available shift from the generator housing to Point 1 Power on system insert an empty cassette or CD 0dB track and set volume to the minimum level O Start the engine and place all electricity consuming devices into operation including lights windshield defrosters and blowers If the revving of the engine creates whistling distortion that becomes more or less freq
23. s 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 RAC GmbH amp Co KG Germany Copyright O 2007 by RAC GmbH amp Co KG Rainbow is a registered trademark 22
24. turbance the amplifier can be reactivated by repeated on off switching If the powering down of the amplifier was caused by overload and too high temperature it will restart itself automatically after a cooling phase Frequent powering off for thermal reasons indicates a poor designation of location and the amplifier should be relocated to a well ventilated area A persistent indication of trouble suggests that a defect in the equipment is present The amplifier should be sent in for repair LOW INPUT Connection Amplifier Input iPaul 2 400 The output signal of the car radio CD player is fed by means of a RCA socket LOW INPUT 7 R right and L left During mono operation of the output stage the LOW INPUT 7 must always be fed with a right and a left signal The full mono performance is achieved only with simultaneous signal input on the right and left RCA sockets When only one mono signal is available for example during operation over an active crossover with only one sub output the sockets 7 must be fed with a Y adaptor 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 LINE OUT Subsequent Amplifier Output The unmodified input signal from LOW INPUT 6 R amp L is free at out
25. uent during revving the ground connection must be corrected Remove antenna plugs from car radio If the distortion disappears there is a potential distortion at antenna ground to battery Remedy Insert galvanic isolated separation filters into the antenna cable Art No 251001 251055 If the distortion continues proceed as follows Clamp the negative conductors at Point 1 of the audio system and attach to engine block gt Check to see if the problem has been repaired If 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 Free this point Point 2 and remove remaining underneath protection O Place screw with a large diameter on this point Clear the area on the auto body around the screw and protect with auto body grease O Attach all grounding cables or set multiplier on this screw and run to all devices central ground Any 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 t
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