NXAMP4x1 & NXAMP4x4 User Manual - Nexo

QUICK START(3) Expansion slotThis slot is used for extra audio inputs and remote control. See further in the manual fordetails about the available options.Since July 2009, all NXAMP4x1s and NXAMP4x4s are shipped with an expansion card fittedin, the NX-DFLT card. This card prevents output noises when main AC power feedingNXAMPs is brutally shutdown. NX-DFLT card should always be fitted in when no otherexpansion card is used. The “Presence” LED on the NX-DFLT card shows that the card isrunning properly. It will light when the amplifier is powered ON (also in Stand-by mode).(4) Power outputsUse Neutrik NL4 cable plug into these ports for safely connecting the power amplifieroutputs to the cabinets.The output routing is always done this way for 4 channels mode:Speakon ASpeakon BSpeakon CSpeakon D1+1+1+1+1-1-1-1-2+2+2+2+2-2-2-2-Please note the symmetry between speakon A/B and C/D. Also you can notice thatSpeakon B is always reverse of Speakon A (and same for D and C).The output routing is always done this way in bridge mode:Speakon ASpeakon BSpeakon CSpeakon D1+1+1+1+1-1-1-1-2+2+2+2+2-2-2-2-Gray lines shows the points of the speakon physically connected to the amplifier output butunused.NB: The routing from DSP channels (from 1 to 4 on the front panel) and the output speakon (from A to D on theback panel) is done automatically regarding setup configuration. See Input Patch menu further in the manual.(5) RS-232 portThrough this serial port, you can upload a new firmware, which adds new functionalitiesand new cabinets’ setups. See further for details about the update procedure.(6) GPIO portThis GPIO port is used for interfacing the amplifier to security system, or to allow a basicremote control of the unit.PAGE 17 OF 103