KLING & FREITAG K&F CD 44 Digital System controller User Manual
Page 39
User's manual
K&F CD 44 Digital System Controller
KLING & FREITAG GMBH © 2014
Version 11.6
Page 39 of 77
The LS-Block 'Flat' is preset for 500W RMS @ 8 Ohm and 2000W Peak @ 8 Ohm.
Selected values for LimReduction, depending on the power ratings [W] of the speakers:
0
100
200
300
400
500
600
700
800
900
1000
-20 dB
-12 dB
-8 dB
-7 dB
-6 dB
-5 dB
-4 dB
-3 dB
-2 dB
-1 dB
0 dB
Typical values for 'LimReduction'
L
im
R
e
d
u
c
ti
o
n
[d
B
]
Loudspeaker RMS-Power [W]
Z
in
= 16
#
Z
in
= 8
#
Z
in
= 6
#
Z
in
= 4
#
3.
Gain (output)
See chapter 'Input and Output Gains' on page 23.
4.
Delay (output)
See chapter 'Input and Output Delays'on page 24.
5.
AmpGain
This is where the CD 44 shows the determined amplifier gain of the power amplifiers
connected to the SENSE / RETURN connectors. After switching off the unit the
settings always stay at the last plausibly determined value. As soon as a signal that
can be analysed by the controller is applied to the Sense connectors, the controller
determines the gain of the connected power amplifier. This value helps the controller to
automatically adjust the limiter threshold. The controller continually checks this value
and re-adjusts the limiter thresholds automatically, for example, when the gain of the
power amplifier is changed manually.
•
Amp1 for power amplifier channel at CH1
•
Amp2 for power amplifier channel at CH2
•
Amp3 for power amplifier channel at CH3
•
Amp4 for power amplifier channel at CH4
Caution
If you do not use the connectors ’AMP RETURN / SENSE’, there is imminent danger that
the speakers could be destroyed. Exception: When operating the CD 44 with SP speakers,
the AMP RETURN / SENSE inputs are not used, since the SP speakers are equipped with
their own limiters. Further information in chapter 'SP Speakers on the CD 44' on page
65.
6.
LimReduction