Omnitronic C-50A User Manual
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Brand: Omnitronic
Category: Speaker System
Type: Operation & user’s manual
Model: Omnitronic C-50A , Omnitronic C-60A , Omnitronic C-80A
Pages: 27
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For all speaker-systems up to 400 Watts, we recommend a cable diameter of 2.5 mm², for all other speaker-
cables 4 mm².
A high damping factor of your amplifier supplies a clear sound reproduction. Unnecessarily long and thin
cables will influence the damping factor and thus the low frequencies in a negative way. In order to
safeguard good sound quality, the damping factor should lie around 50. The longer a cable has to be, the
thicker it should be.
In this respect, a damping factor of 200 will be reduced to 47 (8 Ohms) when using a 10 m long, 2.5 mm²
speaker cable. The power loss at 8 Ohms is 1.63 %, at 4 Ohms 3.25 % and at 2 Ohms even 6.5 %.
The maximum cable length is 30 meters!
Connections
Your speaker-system can be connected via balanced XLR mounting-plugs.
Occupation balanced XLR mounting-plug:
Balanced XLR mounting-plug
:
1: Ground
2: In Phase (+)
3: Out of Phase (-)
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INSTALLATION
This speaker-system must only be installed at a solid, plane, anti-slip, vibration-free, oscilation-free and fire-
resistant location.
Before installing the system, make sure that the installation area can hold a minimum point load of 5 times
the system's load (e.g. weight 20 kg - point load 100 kg).
The speaker-system must never be installed higher than 100 cm without secondary attachment.
Install the desired number of speaker-systems in the room.
Installing and orienting the speaker-system
When installing the speaker-system on e.g. a stage, microphones and turntables should always be located
behind the speaker-systems. In this way, you can avoid dangerous and unpleasant feedbacks. If you cannot
install the speaker-systems this way, the microphones and turntables should be located as far away as
possible from the speaker-systems. When using the speaker-system as monitor-system make sure to avoid
feedbacks.
Avoiding feedbacks
One of the most frequent problems when operating speaker-systems are feedbacks. They can be
recognized by howling and growling loudspeakers. Feedbacks are created then a signal is recorded by a
microphone, amplified, played back by a loudspeaker and then again recorded by the microphone.
The prerequisite for feedback is that the played back signal is louder than the original signal. A feedback
never cover the whole frequency range but only one overboosted frequency.
Make sure that you install especially the monitor-speakers so far away from the microphone that another
recording of the microphone signal is impossible.