RCF DP 4, Owner'S Manual

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ENGLISH
9. RCF S.p.A.
strongly recommends this product is only installed by professional
qualified installers (or specialised firms) who can ensure a correct installation
and certify it according to the regulations in force.
The entire audio system must comply with the current standards and regulations
regarding electrical systems.
10.
There are numerous mechanical and electrical factors to be considered
when installing a professional audio system (in addition to those which
are strictly acoustic, such as sound pressure, angles of coverage, frequency
response, etc.).
11. Hearing loss
Exposure to high sound levels can cause permanent hearing loss. The acoustic
pressure level that leads to hearing loss is different from person to person and
depends on the duration of exposure.
To prevent potentially dangerous exposure to high levels of acoustic pressure,
anyone who is exposed to these levels should use adequate protection
devices.
When a transducer capable of producing high sound levels is being used, it is
necessary to wear ear plugs or protective earphones.
See the technical specifications in the instruction manual for the maximum
sound pressure the loudspeaker is capable of producing.
12. To ensure a correct sound reproduction, loudspeaker phase is to be
respected (loudspeakers are connected respecting the amplifier polarity).
This is important when loudspeakers are installed adjacent one another, for
instance, in the same room.
13.
To prevent inductive effects from causing hum, noise and a bad system
working, loudspeaker lines should not be laid together with other electric
cables (mains), microphone or line level signal cables connected to amplifier
inputs.
14.
The loudspeaker cable shall have wires with a suitable section (twisted,
if possible, to reduce inductive effects due to surrounding electro-magnetic
fields) and a sufficient electrical insulation. Refer to local regulations since
there may be additional requirements about cable characteristics.
15. Install this loudspeaker far from any heat source.
16.
Do not use solvents, alcohol, benzene or other volatile substances for
cleaning the external parts of this product.