SETTING-UP ADVICE
Using the NXAMP4x1 without a rack
If you do not put the NXAMP4x1 into a rack, then it is mandatory to use the four rubber
pads enclosed into the amplifier carton box. These auto adhesive pads should be stuck on
each corner of the bottom of the amplifier. Without these rubber pads, some internal
components can be damaged when there is a shock (for example dropping the amplifier on
a table).
Fuses
The three fuses (one per power supply) provided in the unit will not blow during
normal operation. If one of the fuses blows it means that the Powered TDcontroller has
malfunctioned. This fuse must only be changed by NEXO certified service personnel. In any
case do not replace the fuse with a non-certified NEXO fuse, as this will invalidate the
NEXO warranty.
CAUTION!
This servicing instruction is for use by qualified service personnel only. To reduce the risk of
electric shock, do not perform any servicing other than that contained in the operating
instructions unless you are qualified to do so.
Electromagnetic environments
The emission (this word describes all types of electromagnetic noise radiated by the
equipment) requirements which have been applied to Nexo’s Powered TDcontrollers are the
stringent requirements of the “Commercial and light industrial environment” of the product
family EMC standard for emission.
The immunity (this word describes the ability to cope with electromagnetic disturbance
generated by other items and natural phenomena) requirements that we have considered
exceed those applicable to the “Commercial and light industrial environment” of the
product family EMC standard for immunity. In order to provide a further safety margin, we
recommend that you do not operate the Powered TDcontrollers in the presence of
electromagnetic interference exceeding half of the limits found in this standard.
These two EMC standards are those applicable to pro-audio equipment for the
implementation of the”EMC directive”.
Analogue input signal cables
Analogue signals should be connected to the input ports of the NXAMP4x1 Powered
TDcontroller via shielded twisted pair or Starquad cable fitted with XLR connectors on the
NXAMP4x1 side. We recommend the use of low transfer impedance cables with a braided
shield and transfer impedance below 10 mΩ/m.
The NXAMP4x1 Powered TDcontroller is intended to be used with symmetrical (balanced)
sources (for instance a mixer, see figure bellow). You can see that the TDcontroller
provides a low impedance path between pin 1 of its XLR connectors and its chassis. The
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