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GENERAL SET-UP INSTRUCTIONS
ALPHA SERIES USER MANUAL V1.0
DATE: 14/01/00 18:27
Cables
Nexo recommends the exclusive use of multi-conductor cables to connect the system: the cable kit
is compatible with all the cabinets, and there is no possible confusion between VLF, LF, MF and
HF sections.
Cable choice consists mainly of selecting the correct cable section (size) in relation to the load
resistance and the cable length. Too small a cable section will increase its serial resistance; this
would induce power-loss and response variations (damping factor).
For a serial resistance less or equal to 4% of the load impedance (damping factor = 25), the
maximum cable length is given by:
L
max
= Z x S S in mm
2
, Z in Ohm, L
max
in meters
The table below indicates these values, for 3 common sizes.
Load Impedance (
Ω
)
2 3 4 6 8 12
16
Cable section
Maximum Length (meters)
1,5 mm² (AWG #14)
3
4.5
6
9
12
18
24
2,5 mm² (AWG #12)
5
7.5
10
15
20
30
40
4 mm² (AWG #10)
8
12
16
24
32
48
64
IMPORTANT NOTE: Long speaker cables induce capacitive effects that impair the quality of audio
signals. If long speaker cables must be used, ensure that they do not remain coiled while in use.
Flying the System
Alpha Series loudspeakers are equipped with steel anchor plates that can be fitted with NEXO X-
BOW flying accessories.
The X-BOW Flying Manual must be thoroughly read before flying
the system.
The following points are designed to remind the user of safe practice when flying the X-BOW
system. They cannot address every possible circumstance in which the system might be deployed;
therefore the user must always apply his or her knowledge, experience and common sense. If in
any doubt, seek advice from your NEXO agent.
Flown Systems Safety
•
Always inspect all the X-BOW components and cabinet Fly Rails for damage before
assembly. Pay special attention to the lifting points, trombone sockets and safety clips. If
you suspect that any of the components are damaged or defective, DO NOT USE THE
AFFECTED PARTS. Contact your supplier for replacements.
•
Read the X-BOW Flying manual carefully. Also, be familiar with the manuals and safe
working procedures for any ancillary equipment which will be used with the X-BOW
system such as hoists, steel wires and other rigging components.
•
Ensure that all local and National regulations regarding the safety and operation of flying
equipment are understood and adhered to. Information on these regulations can usually
be obtained from Local Government Offices.
•
When deploying the X-BOW system always wear protective headwear, footwear and eye
protection.
