Nexo GEO S12 Series System Manual

GEO S12 GENERAL SET-UP INSTRUCTIONS
Page 10 / 95 System Manual GEOS12 LS18
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:
GEO S12 module has a 16  nominal impedance in passive mode. When connecting 4 modules in parallel, total load impedance
becomes 4.
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 GEO S12 & LS18 recommended amplification
NEXO TD Controllers
Recommended amplification
NXAMP4x1mk2 Powered Controller Bridged Stereo mode (2x2.6kW/4)
3 x GEO S12 in passive mode per bridged channel
2 x LS18 per bridged channel
NXAMP4x2mk2 Powered Controller 4 channels mode (4x2.5kW/2)
1 x GEO S12 in passive mode per channel
1 x LS18 per channel
NXAMP4x4mk2 Powered Controller 4 channels mode (4x4.5kW/2)
4 x GEO S12 in passive mode per channel
4 x GEO S12 in active mode: 2 channels
3 x LS18 per channel
2.4 GEO S12 & LS18 setups on NEXO TD Controllers
Please consult nexo-sa.com for NEXO TD Controllers firmware information.

Nexo GEO S12 Series Specifications

General

Brand	Nexo
Model	GEO S12 Series
Category	Speaker System
Language	English