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Connecting the speakers
Use cables with sufficient cable cross-section to connect your speakers to the VT-90. Ensure that bare loudspeaker
wires can never touch each other or the back of the housing! No active speakers may be connected! Use only speakers
with a nominal impedance of 4 - 8 Ohm. In addition, you have the possibility to operate the amplifier with 4 loud-
speakers. For this, only use speakers with a nominal impedance of 8 - 16 Ohm. Using speakers with a different no-
minal impedance will damage the amplifier. For each loudspeaker (R: right or L: left), you will find on the back of
the unit two loudspeaker terminals (positive+ and negative-), which are connected to one side of a loudspeaker cable.
There are similar connections on the loudspeaker, as is the polarity. The other end of the speaker cable assigned to
the loudspeaker is connected here. The loudspeaker cable must be connected to the same terminals: the „+“ marked
terminal on the amplifier must lead to the „+“ marked connection of the loudspeaker. The loudspeaker cables are
fitted without connectors. Remove an approximately 1 cm long piece of insulation from each end of the double cable.
Twist the bare strand to avoid mutual shorts. Rotate the screw of the loudspeaker clamp counterclockwise to open the
clamp contacts and insert the bare wire end into the clamp hole. Now turn the screw connection of the loudspeaker
clamp clockwise again in order to tighten the wire in the loudspeaker clamp. You can check that the cable is correctly
seated by pulling it lightly. In case you use pre-assembled speaker cables with 4 mm banana plugs, simply plug them
into the banana holder of the loudspeaker clamp. Make sure that the polarity is correct.
CONNECTION AND COMMISSIONING
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