On the PS8, LS400, PS10, LS500, PS15 (used in passive mode), PS15 Bass and LS1200, the
connectors are wired as follows:
Speakon Connector Signal
pin 1+
ð
Sub bass + (optional)
pin 1-
ð
Sub bass - (optional)
pin 2+
ð
Main PS system +
pin 2-
ð
Main PS system -
An additional Speakon connector on the PS15 connection panel is identified as 2 WAY ACTIVE; it is
reserved for operation in active mode (bi-amp) and wired as follows:
Speakon Connector Signal
Pin 1+
ð
PS15 LF +
Pin 1-
ð
PS15 LF -
Pin 2+
ð
PS15 HF +
Pin 2-
ð
PS15 HF -
Selecting a cable consists of calculating the correct cable section (size) in relation to the load impedance
and the required cable length. Too small a cable section would increase its serial resistance; which would
induce power-loss and response variations (damping factor).
The following table indicates, for 3 common sizes, a cable length with a maximum serial resistance equal
to 4% of the load impedance (damping factor = 25).
Cable Section Maximum Length
Impedance = 8 Ohms Impedance = 4 Ohms
1,5 mm² [AWG # 14] 12 m [40 ft] 6 m [20 ft]
2,5 mm² [AWG #12] 20 m [64 ft] 10 m [32 ft]
4 mm² [AWG #10] 32 m [104 ft] 16 m [52 ft]
Initial Setup Precautions
When first powering up a system including brand new cabinets, NEXO recommends a gradual power
ramp up on an hour period. This allows the loudspeaker components to stabilize during the very first hours
of usage. This is particularly true for adhesives within the speakers' moving assemblies.
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