Bridge Operation; Connection With The Mains; Operation; Selecting The Operating Mode - Omnitronic E-Series Bedienungsanleitung

7.2.2 Bridge operation

In bridge operation the amplifier can be operated in mono mode, i.e. via one input channel. The voltage is
doubled and subsequently also the output impedance. For stereo operation two amplifiers are needed. For
bridge operation, use the red Speaker jack MONO BRIDGE. Set the selector switch for the operating mode
to position "BRIDGE".

7.3 Connection with the mains

Finally connect the device to the mains with the supplied mains cable. The occupation of the connection
cables is as follows:
Cable Pin
Brown Live
Blue Neutral
Yellow/Green Earth
The earth has to be connected! If the device will be directly connected with the local power supply network, a
disconnection switch with a minimum opening of 3 mm at every pole has to be included in the permanent
electrical installation. The device must only be connected with an electric installation carried out in
compliance with the IEC standards. The electric installation must be equipped with a Residual Current
Device (RCD) with a maximum fault current of 30 mA.

8 OPERATION

8.1 Selecting the operating mode

Select the operating mode with the selector switch STEREO/BRIDGE:
• position STEREO: stereo operation (both channels are operated independent of each other)
• position BRIDGE: bridge operation (The input signal of channel 1 is additionally switched to channel 2. A
signal at channel 2 is ignored and volume adjustment is made with the level control for
channel 1.)

8.2 Switching on/off

To prevent loud switching noise, always switch on all other units of the amplifier system before switching on
the power amplifier. After operation, switch off the power amplifier first. Prior to switching on set both level
controls to the left stop position. Then switch on the amplifier with the power switch. The protection indicators
light up for a few seconds. If they do not, check if the amplifier is connected to the mains correctly. After the
turn-on delay the speakers are activated (protection indicators are off). Afterwards the operating mode
indicator lights up and indicates that the amplifier is switched on: STEREO lights in stereo mode and
BRIDGED lights in bridge mode.

8.3 Adjusting the level

1. First, set the volume controls of the pre-amplifiers to zero and turn both gain controls of the amplifier to
mid-position. There should be no loud humming. Should humming persist, check the connection cables
between the pre-amplifier and the amplifier (switch off components before).
2. Adjust the level controls to the desired volume value. In case of overload, the red CLIP indicator lights
up. In this case, reduce the volume correspondingly.
3. In bridge mode the level control for channel 2 is disabled. Volume adjustment is made with the level
control for channel 1.
Additional information on the operation
When operating the amplifying system, please make sure that the loudspeakers always sound well. When
distortions can be heard, either the amplifier or the loudspeaker is overloaded. Overloads can quickly lead to
amplifier or speaker damage. In order to avoid damage, please reduce the volume immediately when
distortions can be heard. When speaker systems are destroyed by overload, the guarantee becomes void.
Always check the sound pressure level with a meter in order to keep to the threshold.
International
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27/31 00043864.DOC, Version 1.0