Nexo GEO M1210 System Manual
Also see for GEO M12 Series: User manual
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Contents
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GEO M12 GENERAL SET-UP INSTRUCTIONS Page 11/902.3 CablingNEXO recommends the exclusive use of multi-conductor cables to connect the system: the cable kit iscompatible 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 tothe load resistance and the cable length. Too small a cable section will increase both its serial resistanceand its capacitance; this reduces the electrical power delivered to the loudspeaker and can also induceresponse (damping factor) variations.For a serial resistance less or equal to 4% of the load impedance (damping factor = 25), the recommendedcable length is given by:Lmax = Z x S S in mm2, Z in Ohm, Lmax in metersThe table below indicates these values, for 3 common sizes.Load Impedance () 2 3 4 6 8Cable section Recommended Cable Length1,5 mm² (AWG #14) 3m/10ft 4.5m/13ft 6m/20ft 9m/30ft 12m/39ft2,5 mm² (AWG #12) 5m/16ft 7.5m/23ft 10m/33ft 15m/49ft 20m/66ft4 mm² (AWG #10) 8m/26ft 12m/39ft 16m/52ft 24m/79ft 32m/105ftMaximum allowed length is 4 times recommended length.Example:GEO M12 module has a 8 nominal impedance in passive mode. When connecting 4 modules in parallel,total load impedance become 2.Recommended length for 4mm2 / (AWG#10) is 8m / 26ft, maximum allowed length is 32m / 105ft.IMPORTANTLong speaker cables induce capacitive effects – up to hundreds of pF depending on thequality of the cable - with a low-pass effect on high frequencies. If long speaker cablesmust be used, ensure that they do not remain coiled while in use.2.4 GEO M12 & MSUB18 recommended amplificationNEXO TD Controllers Recommended amplificationNXAMP4x1mk2 Powered Controller Bridged Stereo mode(2x2.6kW/4)2 x GEO M12 in passive mode per bridged channel1 x MSUB18 per bridged channelNXAMP4x2mk2 Powered Controller 4 channels mode(4x2.5kW/2)1 x GEO M12 in passive mode per channel1 x MSUB18 per channelNXAMP4x4 Powered Controller 4 channels mode(4x4kW/2)3 x GEO M12 in passive mode per channel3 x GEO M12 in active mode: 2 channels2 x MSUB18 per channel2.5 GEO M12 & MSUB18 setups on NEXO TD ControllersPlease consult nexo-sa.com for NEXO TD Controllers firmware information. |
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