Operation Modes; Stereo Operation; Parallel Operation; Bridging - Omnitronic P-250 Bedienungsanleitung

OPERATION MODES

STEREO OPERATION

Normal operation mode of an amplifier, in which every channel gets its own signal. The most commonly used
mode of amplifiers is stereo-operation at 4 Ohms. Make sure that the operation-mode-switch Bridge/Dual/
Parallel is set to Dual.
Calculation number of speakers – impedance
E.g. 1 speaker à 8 Ohm = 8 Ohm
2 speakers à 8 Ohm = 4 Ohm (parallel)
2 speakers à 8 Ohm = 16 Ohm (in line)
e.g. 1 speaker à 4 Ohm = 4 Ohm
2 speakers à 4 Ohm = 2 Ohm (parallel)
2 speakers à 4 Ohm = 8 Ohm (in line)
3 speakers à 4 Ohm = 1 Ohm (parallel), do never connect!!
This means that you can connect up to 2 speaker-system to an amplifier ranging to 4 Ohms. Caution: Make
sure that the impedance of the connected speaker-systems is never below 4 Ohms.
N.B.:
The input-impedance of the speaker-systems should at least be the same or even higher than the output-
impedance of the amplifier.
How to proceed:
Install the desired number of speaker-systems in the room. Connect the speakers among each other using
the inputs and outputs. Connect the cable of the first speaker with the Speakon-plugs Output CH-1 and
Output CH-2 of the amplifier. The signal will be transmitted to the individual speakers.
Connect the input signal to the XLR input-sockets CH-1 and CH-2 on the rearpanel.
Caution! Before switching on your amplifier, please refer to the explanations under Operation.
Adjust the level of each channel with the gain-controls CH-1 and CH-2 on the frontpanel.
Caution! Increase the level of each channel only so far that the PROTECT-LED lights up shortly. Thus, you
avoid that the output signal is distorted and your speakers are damaged.

PARALLEL OPERATION

Connect the input signal to the input-plug CH-1.
Make sure that the amplifier is disconnected from the mains before you set the operation-mode-switch to
parallel.
Connect your speakers to the Speakon-plugs Output CH-1 and Output CH-2.
Caution! Before switching on your amplifier, please refer to the explanations under Operation.
Adjust the level with the gain-control CH-1 on the frontpanel.

BRIDGING

Possibility to run the amplifier in mono-mode, i.e. via one channel. In this way, you can double the nominal
output power. For stereo-operation, 2 amplifiers are needed.
Connect the input signal to the input-plug CH-1 on the rearpanel.
Make sure that the amplifier is disconnected from the mains before you set the operation-mode-switch on the
frontpanel to Bridge.
Connect your speakers to the Speakon-plug Output CH-1 (Bridge P+1 & P+2).
Caution! Before switching on your amplifier, please refer to the explanations under Operation.
Adjust the level with the gain-control CH-1 on the frontpanel.
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