Nexo NUAR - Manual (Page 74)

INSTALLATION RECOMMENDATIONS
Installation Recommendations
Audio Chain Recommendations
About « Loudspeaker Management Devices »
The NXAMP’s factory delay presets are optimised to provide the best possible crossover
between the MAIN SYSTEM and SUB systems.
Optimum results are always obtained for strictly identical signals feeding
simultaneously all the NEXO NXAMP Digital TDcontrollers.
Typically, this signal is delivered by the stereo bus output of a parametric/graphic stereo
equalizer, which is fed by the stereo output of the mixing console.
Inserting devices such as “loudspeaker management controllers” that modify the
phase relationship between SUB’s NXAMP and MAIN SYSTEM’s NXAMP inputs will
lead to unpredictable results, and will severely damage the final result. NEXO
strongly recommends avoiding use of such devices.
N.B.: Do not use NEXO’s TDcontrollers (Analog or Digital) to feed the inputs of the NXAMP
as this processing is already included inside the NXAMP.
Operating SUB’s fed through an Aux Output
If the SUB’s are to be operated through a different output than the main system, NEXO
strongly recommends that:
• The audio chain is strictly identical for SUB’s and MAIN SYSTEM’s mixing board
outputs (same devices with same settings).
• Phase relation between the two feeds is aligned with proper measurement tools
(Easera Systune TM , Spectralab TM or WinMLS TM ).
Operation of Multiple Powered TDcontrollers
Some MAIN SYSTEM/SUB systems require a minimum of two NXAMP’s per side (one for
MAIN SYSTEM’s, another for the SUB’s). Eventually, two or more NXAMP’s will operate
within the same MAIN SYSTEM cluster. It is mandatory to verify the consistency of the
setups and adjustment between processors to avoid the problems described below.
When using multiple NXAMP’s in a single array, all parameters should be
identical and set to proper values.
System alignment
For a given measurement microphone or listening position, the reference point for this
adjustment is the closest point of each array (SUB and Main System) to the given position
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