Dynacord LX 1600, Owner'S Manual

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INPUT A / INPUT B
The inputs INPUT A & INPUT B are electronically balanced
offering input sensitivity of
+4.7dBu /1.33V (LX1600),
+5.8dBu /1.51V (LX2200),
+7.0dBu /1.74V (LX3000),
for direct connection of mixing consoles, signal processors, etc.
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.
NF-CONNECTION CORDS
Choosing high-quality balanced cables (two conductors for the audio signal plus separate shield-
ing mesh) with XLR-type connectors is recommended for LF-signal connection. Although connecting
unbalanced cables to the power amplifier inputs is possible as well, using balanced cables is always
preferable. A great number of today’s audio appliances employ balanced outputs. With balanced ca-
bling, the shield connects all metal enclosure parts and therefore efficiently eliminates the introduction
of external 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 amplified.
REAR PANEL
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 HF-interference may occur, which very likely will damage the
power amplifier and/or the connected speaker cabinets.
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