KLING & FREITAG K&F CD 44 Digital System controller - Manual (Page 73)

User's manual K&F CD 44 Digital System Controller
KLING & FREITAG GMBH © 2014 Version 11.6 Page 73 of 77
• Switch off all equipment and turn down all level controls of the mixing console and the
power amplifiers.
• Wire the speaker systems according to the instructions in this manual.
• Now switch on the mixing console first, followed by the CD 44 Controller and, at last,
the power amplifiers. Always use the before mentioned switching order. Otherwise
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). The SIGNAL-LEDs of the CD 44 Controller light up if
there is an output signal greater than -45 dB. Your system is ready for use.
• 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 signal
interruptions caused by protection circuits or damages to the speakers, turn the level
controls of the power amplifier to the maximum position, if possible. Only turn up the
signal level at the mixing console or on the controller far enough so that the power
amplifiers are not overloaded; or reduce the limiter threshold at the controller (<Out1>
through <Out4 » LimReduction>).
• 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.