PS AND LS GENERAL SET-UP INSTRUCTIONS
System Manual PSR2 Series Page 9 / 109
2.1.4 Configuring PS15R2 for passive or active mode
Remove the six TORX screws that hold the connector panel.
Remove the connector panel so that filter WAGO connectors become accessible.
In Passive Mode, WAGO connector from filter should be inserted in “Passive In”, and “Passive Out” should be connected to
speakers WAGO connector.
In Active Mode, WAGO connector from filter should be directly connected into speakers WAGO connector (PCB connectors are
then unused).
PS15R2 connector panel Passive mode Active mode
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:
PS15R2 module has a 8 nominal impedance in passive mode. When connecting 2 modules in parallel, total load impedance
becomes 4.
Recommended length for 4mm
2
/ (AWG#11) is 16m / 52ft, maximum allowed length is 64m / 208ft.
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