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INPUT A / INPUT B
NF-CONNECTION CORDS
Choosing high-quality balanced cables (two conductors for the audio signal plus seperate shielding
mesh) with XLR-type connectors are recommended for LF-signal connection. Although connecting un-
balanced cables to the power ampli er inputs is possible as well, using balanced cables is always pref-
erable. A great number of today’s audio appliances employ balanced outputs. With balanced cabling,
the shield connects all metal enclosure parts and therefore ef ciently eliminates the introduction of ex-
ternal interference – mostly noise and hum.
XLR-
type connector pin-assignment
XLR (male)
XLR (female)
PARALLEL
The input connectors of channel A and channel B are electrically connected in parallel
when the selector switch is set to PARALLEL. However, individually controlling the
volume of both channels is still possible via the corresponding level controls A and B.
DUAL
If the selector switch is set to DUAL, the audio signals of channels A and B are
independently ampli ed.
REAR PANEL
If the selector switch is set to DUAL, the audio signals of channels A and B are
Although having XLR-type output connectors, some mixing console models provide unbalanced
output connection only. When using mixers with unbalanced outputs, bridging PIN1 and PIN3
of the power amp’s input connectors or leaving PIN3 of the cable’s plugs unconnected is
necessary. Otherwise, when feeding in unbalanced audio signals via PIN3 (b, -, „cold“) and PIN2
(a, +, „hot“), strange humming and RF-interference may occur, which very likely will damage the
power ampli er and/or the connected speaker cabinets.
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CL800 +1.15dBu / 0.88V
CL1200 +3.2dBu / 1.12V
CL1600 +4.7dBu / 1.33V
CL2000 +5.5dBu / 1.46V
The inputs INPUT A & INPUT B of the CL series are electronically
balanced. The voltage gain of all models is set to 32 dB (constant
gain). This results however in different input sensitivities for the
different models (see table), but the level adjustment of active
crossovers or signal processors in multi-way systems is much
easier. Power ampli ers with different output power can be
changed without consideration, the crossovers have not to be
adjusted due to the constant ampli cation of the whole unit line.
If external voltage limiters are used, they should be set to the
used power class with consideration of the connected speaker
systems. The XLR-type connectors OUTPUT A & OUTPUT B
are prepared for „through-connecting“ input signals to additional
external power amps. The input signal is directly routed to these
output connectors. There are no repeaters or other electronic
components within that signal path. Accordingly, input and output
connectors of the corresponding channel are interconnected in
parallel, offering permanent electrical connection, without regard
to the setting of the Power-ON switch.