Rainbow CS 275.28 Platinum active Installation Manual Download Page 12

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around at least 6 dB quieter than on the front passenger side. For optimal positioning, a professional dealer, who 
can more accurately position the frequency response using specific measuring instruments, should be contacted. 
 

Note: 

It is important that 

all

 loudspeakers are correctly attached before start-up of the crossovers. If the 

crossovers are set into operation without the loudspeakers being hooked up, a very high current is 
produced on the unloaded LC-filters, which can, under the circumstances, destroy the coils! The 
jumpers of the crossovers must 

always

 be placed on the specified pins, according to the instructions. 

Other combinations are 

not functional

 and do not behave like unattached loudspeakers! What’s more, 

improper connection of the crossover will prevent it from working within the intended range. 

 
 

Connecting the Crossover 

 
The crossovers (X) and the loudspeakers (B / J) are provided with screw connections and with polarity markings. 
Through this control system the appropriate steps in connecting the loudspeakers with the crossovers are ensured. 

Firmly tighten the screws of the crossover, woofer and tweeter connections! 

 

Standard Connection of Amplifier/Radio: 

Attach prepared loudspeaker cable (at least 2.5 mm²) at the terminal „Input Low-AMP“ (fig. 9, No. 3) on the right 
side of the crossover, whereby the plus connector is connected with the positive terminal and the minus connector 
with the minus terminal. Jumpers marked “BIWIRING” must be closed (see fig. 6 first diagram). Attach the other 
end of the loudspeaker cable, making sure the polarity corresponds with that on the amplifier and radio sides. 
 

Figure  6: Possible Wiring Methods 

 

 

 

Bi-Wiring Connection: 

Attach prepared loudspeaker woofer cable (at least 2.5 mm²) at the terminal „Input Low-AMP“ (fig. 9, No.3) on the 
right side of the crossover, whereby the plus connector is connected with the positive terminal and the minus 
connector with the minus terminal. Attach prepared loudspeaker tweeter cable (at least 1.0 mm²) at the terminal 
„Input High-AMP“ (fig. 9, No. 4) on the left side of the crossover, whereby the plus connector is connected with 
the positive terminal and the minus connector with the minus terminal. Jumpers marked “BIWIRING” must be 
open (see fig. 6 second diagram). Attach the other end of the loudspeaker cable, making sure the polarity 
corresponds with that on the amplifier and radio sides. 
 

Bi-Amping Connection: 

For bi-amping operation the woofers and tweeters are each driven by a separate amplifier. Connect “Input Low-
AMP” (fig. 9, No. 3) terminal “+” and “-“ of the crossover with the speaker output of the woofer amplifier, making 
sure the polarity corresponds with that on the crossover. Connect “Input High-AMP” (fig. 9, No. 4) terminal “+” 
and “-“ of the crossover with the speaker output of the tweeter amplifier, making sure the polarity corresponds with 
that on the crossover. Jumpers marked “BIWIRING” must be open (see fig. 6 third diagram). 

Summary of Contents for CS 275.28 Platinum active

Page 1: ...80 Watt Part No 231444 CS 275 28 Platinum active 2 Way Component System 180 Watt Part No 231445 Please read installation manual carefully before beginning installation RAC GmbH Co KG P O Box 1225 7489...

Page 2: ...ge as a result of use or misuse of this product Working on Automobile Do not use your automobile until all components of the loudspeaker system have been secured to the interior framework Failure to d...

Page 3: ...14 Figure 6 Attaching the Crossover 15 Dear valued customer We congratulate you on your purchase of our superior product and thank you for placing your trust in Rainbow We have put together this inst...

Page 4: ...r the purpose of altering the parts or function is considered foreign interference and grounds for termination of the warranty For the purpose of technical safety the loudspeaker should only be attach...

Page 5: ...Mounting depth without with ring 82 mm External diameter without with ring 180 mm Installation diameter 144 mm Fastening diameter 168 mm Woofer Thiele Small Parameter Resonacne frequency 44 Hz DC res...

Page 6: ...udspeakers may be installed in your vehicle in a variety of places In determining the installation location the following information should be considered The position of the speakers has a decisive i...

Page 7: ...tention to frontstaging and sound variations Frontstaging adjusts itself only if the tweeter is not too far from the midrange and or woofer The decision as to the optimal installation location require...

Page 8: ...m area of the door lining The distance between tweeters midrange and woofers should be kept as small as possible to prevent the sound of the loudspeakers from being negatively impacted fig 1 In order...

Page 9: ...high grade steel nuts M4 D Prepare the space for the woofer by smoothing all metal edges and drill holes carefully removing any metal shavings or pieces As needed apply a protective varnish or edge pr...

Page 10: ...t installation Place tweeter J in the prepared opening and put clamp ring from the back over the tweeter housing Use the three set screws S to fix the tweeter by turning them in with the provided alle...

Page 11: ...distortion Rolling up excess loudspeaker cable length is not helpful as it merely increases chances of distortion The Crossovers With all component systems the tweeter range has been provided with a t...

Page 12: ...ed with the positive terminal and the minus connector with the minus terminal Jumpers marked BIWIRING must be closed see fig 6 first diagram Attach the other end of the loudspeaker cable making sure t...

Page 13: ...the unmarked wire with the minus connection Connect the other end of the loudspeaker cable preferably with suitable contacts to the available connection cable of the tweeters see fig 7 and make sure...

Page 14: ...Reference frequency reponse gliding 2dB per octave Recommended with installation of the tweeters directly in the listening axis and or ear proximity e g A or B pillar front instrument panel area with...

Page 15: ...J1 J2 J8 are for professionals only who have the knowledge and measurement equipment to measure frequency response and phase in the vehicle If you do not have any measurement equipment and you are no...

Page 16: ...dirt or metal shavings in the open magnetic system inappropriate installation for use not corresponding to the intended range of application Electrical Defects Damage resulting from electrical and th...

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