User's Manual K&F PASSIO and K&F PASSIO W
KLING & FREITAG GMBH © 2018 Version 3.2 Page 8 of 28
Never feed audio at excessive levels to the speaker. Mixing consoles, equalizers, effect
units, etc. can produce clipping; excessive levels are normally visible on meters and through
indicators. We, therefore, recommend turning up the power amplifiers all the way and
adjusting the level before the power amplifier in order to avoid overloading the input circuit.
In any case, be sure to lower the signal level once it sounds distorted.
Operations without K&F SystemRack:
• To protect the speakers from being destroyed and to avoid fire hazard, they should
only be operated with professional power amplifiers with a maximum rated output
power of 600 W @ 8 Ohm.
• If power amplifiers have power ratings lower than 300 W @ 8 Ohm, then it is
imperative that the amplifiers have clipping limiters. Alternately, you can also insert a
clipping limiter before the amplifier.
• Power amplifiers can also be overloaded at the input circuit without the amplifier
signalling the clipping, i.e. when there is not sufficient headroom in the input circuit.
• To protect the loudspeaker from mechanical damage when high SPL is required a
highpassfilter of 24 dB/oct. at 60 Hz has to be inserted into the signal chain.
Operations with K&F SystemRack:
• For optimal performance and operating safety of the K&F PASSIO/K&F PASSIO W
speakers we recommend using the K&F SystemRack.
• Clipping at the power-amp output is typically shown by a red clipping indicator.
For damage caused by
• overloading the speakers or
• using power amplifiers with other than the recommended maximum output power
we do not assume warranty and excludes liability for possible consequential damage.
Signals that may damage the speakers include the following:
• clipping power amplifiers
• Continuous high-volume signals at high frequencies, continuous audio feedback
• Continuously distorted signals at high levels
• Sounds occurring when connecting, disconnecting, or switching on a device on the
audio system while the speaker is on
Never place your speakers
• where they are permanently exposed to direct sunlight,
• where the devices are exposed to high moisture or rain.
• where they are exposed to strong vibrations or dust.
Avoid damage caused by the speakers' magnetic fields
Even when not connected, loudspeakers continuously produce a magnetic field. Therefore,
during transport and placement of the speakers, it is important to ensure that there is a
sufficient distance between the speakers and magnetic data media and computer/video
monitors (except flat panels).