KLING & FREITAG K&F CA 1515-9 - Manual (Page 24)

User's Manual CA 1201, CA 1215-6 /-9, CA 1515-6 /-9
KLING & FREITAG GMBH ©1998 - 2015Version 4.0, 07.05.2015 Page 24 of 53
12.2 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.
13. 13. 13. 13. Operating the Speakers
− Switch off all equipment and turn down all level controls.
− Wire your CA systems.
− Pay attention to the user’s manuals of your power amplifiers.
− 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 frequencies become notably quieter or the mid-
frequencies such as voices cannot be located.
− 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. Other-
wise switching noises may damage the system.
− If there is interference, turn off all appliances in the reverse order and check all cable connections.
− 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.
− Turning down the input level controls may not always prevent distortions in the input section of the pow-
er amplifier, especially if this section has a relatively low headroom. A clipping signal may not be displayed
by the clipping indicator then. To prevent signal 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 am-
plifiers.
− 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.
− 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 seconds, it will turn back on automatically.