Nexo NXAMP - Manuel (Page 29)

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29
INSTALLATION RECOMMENDATIONS
Installation Recommendations
Audio Chain Recommendations
About « Loudspeaker Management Devices »
The NX242’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 NX242 controllers.
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 NX242 and MAIN SYSTEM’s NX242 inputs will lead to unpredictable
results, and will severely damage the final result. NEXO strongly recommends avoiding use of
such devices.
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 GeoT mixing board outputs (same devices with same
settings);
- phase relation between the two feeds is aligned with proper measurement tools (SMAART
TM ,
Spectralab TM , MLSSA TM , see below).
See also the application note page 35.
Operation of Multiple TDcontrollers
Typically, MAIN SYSTEM/SUB systems require a minimum of two NX242’s per side (one NX242 for
MAIN SYSTEM’s, another for the SUB’s). Eventually, two or more NX242’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 NX242’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 (see example below)
USER MANUAL LOAD2_22
DATE: 03/12/2004