Yamaha NEXO Alpha & Alpha E Series Owner's Manual download pdf (Page 6)

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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:

max

= Z x S S in mm

, 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.

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Yamaha NEXO Alpha & Alpha E Series Owner's Manual Page 6

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