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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. 
 
 

Содержание KW 4V8

Страница 1: ...aftwerk 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...

Страница 2: ...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 beco...

Страница 3: ...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 D...

Страница 4: ...he 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 particle...

Страница 5: ...sible 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...

Страница 6: ...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 Sig...

Страница 7: ...7 Front View and Controls KW 4V8 Figure 1 Controls...

Страница 8: ...ith 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 con...

Страница 9: ...tentiometer 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 ca...

Страница 10: ...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 f...

Страница 11: ...ve 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...

Страница 12: ...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 1...

Страница 13: ...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 T...

Страница 14: ...enting 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 t...

Страница 15: ...es 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 switc...

Страница 16: ...stort 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...

Страница 17: ...ange 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 an...

Страница 18: ...18 Figure 7 Principal Cable Diagram...

Страница 19: ...l 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 oth...

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