Dynacord LX 1600, Owner'S Manual

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REAR PANEL
Power amp output connection for the two channels A
(left) and B (right) is provided via professional SPEAKON
connectors. These offer an electrical and mechanical
secure connection which complies to all security
regulations. It also allows the use of high quality speaker
cables with a diameter of 4 x 2.5 mm
2
. The DYNACORD
accessory assortment includes recommended cables
and connectors. A plastic cover to prevent inadvertent
erroneous connection protects the BRIDGED OUT
connector. Remove the cover only when actually operating
the power amplifier in Bridged-Mode.
POWER AMPLIFIER OUTPUT CONNECTORS
BRIDGED MODE
With the BRIDGED-MODE switch being engaged, using the channel A input
for audio signal feed is mandatory , since input B provides no function. While
the amplifier of channel A operates as usual. Additionally, the audio signal is
internally inverted and routed to the amplifier of channel B. Both amps – A
and B – now work in push-pull operation to provide doubled output voltage at
the BRIDGED-OUT connector.
The regular output voltage of each amplifier channel A + B is still present at the corresponding output
connectors CHANNEL A and CHANNEL B. However, using these signals is not recommendable because
of the aforementioned phase inversion. Operating the power amp in Bridged Mode with loads
of 2ohms connected is not allowable.
CAUTION: Operating the power amplifier in Bridged-Mode may result in extremely high voltages
being present at the BRIDGED OUT connector. The connected loudspeaker systems have to be
designed for handling such high voltages. Please carefully read the power handling specifications
as stated in the documentation of the according loudspeaker system and make sure to check
whether they are in compliance with the output capacity specifications of the power amplifier.
GROUND-LIFT SWITCH
The ground-lift switch allows eliminating noise loops. When operating the
power amplifier in a 19“ rack-shelf system or cabinet together with other
equipment, setting the switch to its GROUNDED position is recommended.
When operating the power amplifier together with appliances with differing
ground potentials, set the switch to its UNGROUNDED position
MAINS INPUT
Under normal circumstances, the mains fuse only blows in case of fault.
Replacing the fuse is only permissible for authorized service personnel
using a new fuse of the same type with identical amperage, voltage and
blow characteristics. The high-performance mains cord supplied with your
power amplifier complies with applicable safety regulations, plus that its diameter corresponds to the
power amp’s power output capacity. Whenever possible make sure to use the supplied mains cord for
connecting the power amp to the mains network. Using a different mains cord with a smaller diameter
results in higher leakage, consequently reducing the amplifier’s maximum power output capacity.
WARNING:
The speaker output terminals are marked with a symbol “ ”, which signifies that these
terminals present a shock hazard to the user.
8
CAUTION!
Pins 2+/2- of the CHANNEL A SPEAKON output, which normally are not in use, are also connected to
output B to ensure comfortable connection of 2-way speaker cabinets (e.g in Bi-Amping Mode) when
using 4-wire Speakon cables. To prevent short-circuit and/or to protect your speaker systems from being
damaged when connecting the cabinets, please make sure to mind the Low- and High channels’ specific
pin-assignments! If, for example, the subwoofer audio signal is used to feed a tweeter, it is more than
likely that this will instantly destroy the HF-driver’s coil.