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Summary of Contents for Rainbow KW 4V8
- Page 1 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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Page 2: Broadband Mode Frequency Response 11 Figure
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. -
Page 3: Table Of Contents
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. -
Page 4: User Safety Notice
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. -
Page 5: Low-Pass Mode Rear Frequency Response 14 Figure
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. -
Page 6: Technical Data
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) •... -
Page 7: Front View And Controls
Front View and Controls KW 4V8 Figure 1: Controls... -
Page 8: Installation
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. -
Page 9: Remote Connection
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. -
Page 10: Clipping Display
„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”... -
Page 11: Broadband Mode Front & Rear
Operation Mode: Broadband FRONT & KW 4V8 REAR 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. -
Page 12: High-Pass Mode Front & Rear
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. -
Page 13: Low-Pass Mode Rear
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... - Page 14 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.
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Page 15: Bandpass Rear Mode
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. -
Page 16: Power Provision Indications
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. - Page 17 If the distortion continues, proceed as follows: Clamp the negative conductors (–) at Point 1 of the audio system and attach to engine block. 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.
- Page 18 Figure 7: Principal Cable Diagram...
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Page 19: Warranty Terms And Conditions
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.
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