Operation; Selecting The Operating Mode; Switching On/Off; Adjusting The Level - Omnitronic EDP SERIES User Manual

8. OPERATION

8.1 Selecting the operating mode

Select the operating mode with the selector switch STE/BRG:
• position STE: stereo operation (both channels are operated independent of each other)
• position BRG: 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).

8.3 Adjusting the level

1. First, set the volume controls of the preamplifiers 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 preamplifier 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.

9. PROTECTIVE CIRCUITS

The integrated protective circuits prevent damage to the speakers and the amplifier. If activated, the
speakers are electrically separated from the amplifier and the protect indicator lights up:
• for a few seconds after switching-on until the speaker outputs are ready for operation
• in case of overheating of the amplifier
• in case of overload of the amplifier
• in case of a VHF signal at a speaker output
• in case of a short-circuit at a speaker output
If the red protect indicator lights up during operation or if it does not extinguish after switching on, the
amplifier has to be switched off and the cause of the fault has to be removed.
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