GEO M10 GENERAL SET-UP INSTRUCTIONS Page 9/79
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.
Maximum allowed length is 4 times recommended length.
Example:
GEO M10 module has a 8 nominal impedance. When connecting 4 modules in parallel, total load
impedance become 2.
Recommended length for 4mm2 / (AWG#10) is 8 m / 26 ft, maximum allowed length is 32 m / 105 ft.
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 M10 & MSUB15 recommended amplification
Recommended amplification
DTD Controller + DTDAMP4x1.3
(4x1.3 kW/4)
2 x GEO M10 per channel
1x MSUB15 per channel
NXAMP4x1 Powered Controller 4 channels mode
(4x1300W/2)
NXAMP4x1 Powered Controller Bridged Stereo mode
(2x2600W/4)
2 x GEO M10 per bridged channel
2 x MSUB15 per bridged channel
NXAMP4x4 Powered Controller 4 channels
(4x4kW/2)
4 x GEO M10 per channel
3 x MSUB15 per channel
2.4 GEO M10 & MSUB15 setups on NEXO TD Controllers
Please consult nexo-sa.com for NEXO TD Controllers firmware information.
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