Allen & Heath Icon Manual - Stagecraft

A AND B OUTPUTSThese are nominal +4dBu line level outputs on XLRfor connection to an external amplifiers. They aredifferentially balanced using a 3 wire connection todrive long cable runs without signal degradation orinterference pickup. Wire the cable using an inline 3-pin female XLR plug. You can connect to anunbalanced 2 wire input by linking pin 3 to pin 1 inthe plug as shown.AB MAIN OUTPUT (DL1000 ONLY)MAIN OUTPUTBALANCED PIN2 = +A = L B = R Stereo PAA = FB B = M Mono PA, single monitorA = AUX B = FB External PA, two monitorsAB SPEAKER OUTPUT (DP1000 ONLY)300W + 300W RMS4 OHM LOAD MINIMUMA and B outputs are affected by the 10-band graphicequalisers. Use the MODE function to determinewhich console mix is routed to these outputs:The power amplifier loudspeaker outputs areavailable on industry standard locking Speakon ®connectors. Use the MODE function to determinewhich console mix is routed to these outputs. Theoutputs can be configured as shown above.Use Speakon ® NL4FC cable plugs and wire thespeaker positive (+) cable to pin 1+ and speakernegative (-) to pin 1-. Use heavy duty 2 core cable ofat least 10 Amp rating for the loudspeakerconnections. The cable does not have to be shielded.Make sure that the connections are reliable and inphase (speaker + to amp +, speaker - to amp -).Ensure the plug is rotated and locked into position.☺ Tip Check that the loudspeakers are wiredcorrectly in-phase by routing the same mono signalto both outputs at the similar level and listening tothe sound when you stand centrally between them.In-phase speakers have a solid centre image, out-ofphasespeakers produce a weak centre image withstrange ‘phasing’ effects.Do not connect a load of less than 4 ohmsimpedance. Failure to observe this may result indamage to the amplifier. If you connect morethan one speaker to each output by linking themmake sure that the combined impedance is notless than 4 ohms. Divide the impedances whenconnecting in parallel, add the impedances whenconnecting in series.To avoid damage to the amplifier do notshort the speaker connections together or linkthem to ground.4 - 6 icon SERIES