Nexo Ray Sub Series System Manual

RS GENERAL SET-UP INSTRUCTIONS
Page 10 / 76 System Manual RS Series
2.2 Cabling
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 LF, MF and HF sections.
Cable choice consists mainly of selecting cables of the correct sectional dimension (size) in relation to the load resistance and
the cable length. Too small a cable section will increase both its serial resistance and its capacitance; this reduces the electrical
power delivered to the loudspeaker and can also induce response (damping factor) variations.
For a serial resistance less or equal to 4% of the load impedance (damping factor = 25), the recommended 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 ()
2
2.6
4
5.3
8
16
Cable section
Recommended Cable Length
1,5 mm² (AWG #15)
3m/10ft
3m/13ft
6m/20ft
8m/26ft
12m/39ft
24m/79ft
2,5 mm² (AWG #13)
5m/16ft
7m/23ft
10m/33ft
13m/44ft
20m/66ft
40m/131ft
4 mm² (AWG #11)
8m/26ft
10m/33ft
16m/52ft
21m/70ft
32m/105ft
64m/210ft
6 mm
2
(AWG #9)
12m/40ft
16m/52ft
24m/79ft
32m/104ft
48m/160ft
96m/315ft
Maximum allowed length is 4 times recommended length.
Example:
Each RS18 driver has a 8  nominal impedance; in omni mode, both loudspeakers can be driven in parallel on one amplifier
channel, presenting therefore a 4  load impedance.
Recommended length for 4mm
2
/ (AWG#11) is 16m / 52ft, maximum allowed length is 64m / 208ft.
IMPORTANT
Long speaker cables induce capacitive effects – up to hundreds of pF depending on the quality of the
cable - with a low-pass effect on high frequencies. If long speaker cables must be used, ensure that they
do not remain coiled while in use.
2.3 RS15 and RS18 recommended amplification
NEXO TD Controllers
Recommended amplification
NXAMP4x1mk2 Powered Controller Bridged Stereo mode (2x2.6kW/4)
1 x RS15 in omni mode (drivers in //) per bridged
channels
1 x RS18 in omni mode (drivers in //) per bridged
channels
NXAMP4x2mk2 Powered Controller 4 channels mode (4x2.5kW/2)
1 x RS15 in omni mode (drivers in //) per channel
2 x RS15 in directional mode: 2 channels
NXAMP4x4mk2 Powered Controller 4 channels mode (4x4.5kW/2)
2 x RS15 in omni mode (drivers in //) per channel
4 x RS15 in directional mode: 2 channels
1 x RS18 in omni mode (drivers in //) per channel
2 x RS18 in directional mode: 2 channels
2.4 RS15 and RS18 setups on NEXO TD Controllers
Please consult nexo-sa.com for NEXO TD Controllers firmware information.

Nexo Ray Sub Series Specifications

General

Brand	Nexo
Model	Ray Sub Series
Category	Subwoofer
Language	English