Omnitronic LI Series, Руководство пользователя

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15
Making the Connections
Step 1: If the PA system is turned on, turn it off before making any connection.
Step 2: To facilitate handling, the terminals can be removed from their plug-in connections on the unit
and replaced after connection. Connect the lines of the amplifier to the positive and negative pole
of the speaker with a suitable speaker cable.
Step 3: When connecting several speakers, make sure that all speakers have the same polarity and that
the amplifier is not overloaded.
Information on Installing Speaker Cables
• Speaker systems must only be connected via sufficiently dimensioned cables. Cables that are too thin lead
to cable heatup or enormous power loss and loss in sound quality.
• 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 %.
• Both cables should be of the same kind and have the same length.
• The maximum cable length should not exceed 30 meters.
• Always treat cables carefully and protect them from damages during transportation.
• Install cables always in a structured way and protect them from damage.
• Cables must be installed in a way that no person can stumble over them. Always fix cables with an
appropriate tape.
• Cables should be installed directly (no loops, S-shaped overlengths).
• Always install cables far away from power cables (never closely parallel).
• Never put heavy objects like speaker systems, flightcases etc. on cables.
• Never operate cables wound up.