User's Manual
CA 1201, CA 1215-6 /-9, CA 1515-6 /-9
KLING & FREITAG GMBH ©1998 - 2015
Version 4.0, 17.02.2015
Page 27 of 54
9.2
Operations with K&F System Controller
For optimal performance and operating safety we recommend using a K&F system
controller. Instructions for use, connecting diagrams and detailed descriptions of the
latest controller models ‘CD 24’ and ‘CD 44’ you can find in the corresponding user’s
manuals.
10.
Operating the Speakers
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Switch off all equipment and turn down all level controls.
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Wire your CA systems.
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Pay attention to the user’s manuals of your power amplifiers.
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Upon completing the wiring, ensure that the connected speaker channels are working in
phase. To do so, use i.e. a phase checker. A phase error can also be recognized when the
connected channels are used simultaneously. During simultaneous use the bass frequen-
cies become notably quieter or the mid-frequencies such as voices cannot be located.
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Now switch on the peripheral equipment first (mixing console, effects etc.), followed by
the K&F system controller, if used, and the power amplifiers. Always use the before
mentioned switching order. Otherwise switching noises may damage the system.
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If there is interference, turn off all appliances in the reverse order and check all cable
connections.
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Successively turn up the individual power amplifier channels and send a signal with low
volume to the system. Check to see if the desired signals are applied to the intended
speakers and make sure there is no interference. Make sure everything works properly, i.e.
if the signals come from the correct speaker paths (high signals from the tweeters, bass
signals from the bass speaker). Your system should now be ready for operation.
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Turning down the input level controls may not always prevent distortions in the input
section of the power amplifier, especially if this section has a relatively low headroom.
A clipping signal may not be displayed by the clipping indicator then. To prevent sig-
nal interruptions from protection circuits or damages to the speakers, turn the level
controls of the power amplifier to the maximum position, if possible. The output level
of the mixing console or the controller should be set to a level that doesn't overload
the power amplifiers.
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When turning off the system, the input controls for the power amplifiers should be
turned down first followed by the power switches of the amplifiers. After that, the
other appliances can be turned off.
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The crossovers of the CA systems are equipped with protection circuits for the high
frequency driver and the crossover itself. These circuits cut off the signal current when
highly overloaded. If the high speaker turns off, reduce the volume. After a few sec-
onds, it will turn back on automatically.
Important
