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4.1
Balanced Input Signals
With a balanced audio source pin 2 (hot) and pin 3 (cold) are used to carry the signals. Pin 1 is the common signal
and chassis ground. Always pay attention to a correct shielding.
4.2
Unbalanced Input Signals
If there is only an unbalanced audio source available, the audio signal must be put to pin 2 (hot). Pin 3 (cold) must be
connected to pin 1 (signal mass). Always pay attention to a correct shielding.
5.
Output Wiring and Damping Factor
The output connections are made via Neutrik high-current SpeakON sockets. To keep the cable losses in the
loudspeaker cables low and to ensure safety, we recommend using a cable cross section of 4 mm
amplifiers are equipped with scoop-proof high-current SpeakON sockets which have a very low contact resistance of
typically 1milliohm per contact. For your own safety use original Neutrik connectors exclusively.
The best audiophile results and maximum sound pressure levels will be achieved through minimum cable resistance
values. The resistance is proportional to the cable length or inversely proportional to its cross section. Use therefore
preferably large copper cross sections and keep your cables as short as possible.
CAUTION:
All contacts of the SpeakON connectors are hot. Never connect the amplifier outputs with
any other outputs, ground or signals!
CAUTION:
A safe, fully insulated line must be used. When laying cables out in the open, use watertight
and UV resistant cable insulations. Please observe by all means the relevant national
guidelines and CE regulations!
CAUTION:
To avoid the risk of an electric shock, the amplifier should not be used if blank cable ends
are visible. The inputs and outputs must be wired only when the amplifier is turned off and
not connected to mains. Never touch the output voltages at the SpeakON connectors during
operation to avoid the risk of an electric shock!
CAUTION:
Use only suitable cables with a copper cross section of at least 4 mm
loudspeakers. Due to the high output power, fire hazard or injury through an electric shock
may result with an undersized copper cross section! Molten insulations can produce short
circuits, causing personal or equipment damages.
CAUTION:
No sensitive signal and data lines, transmitters and receivers must be laid out or built in
close proximity to the loudspeaker and mains cables. The high currents (up to 120 A in
speaker cables) and the associated magnetic AC fields may produce malfunctions.
Page 8 of 20
2
. Hoellstern
2
to connect the
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