Mackie Onyx 1640i Owner's Manual - Page 12
Left/right Xlr Main Outputs - bands that use
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7. TALKBACK MIC This is where you plug in your external talkback microphone if you need to have one. This female XLR connector has +48 VDC phantom power always applied, so you may use dynamic or condenser microphones. Note: Almost all dynamic microphones may be used with phantom power, but you might want to check the documentation that came with your microphone just to be sure. 8. LEFT/RIGHT XLR MAIN OUTPUTS These male XLR connectors provide a balanced linelevel signal that represents the end of the mixer chain, where your fully mixed stereo signal enters the real world. Connect these to the inputs of your main power amplifiers, powered speakers, or serial effects processor (like a graphic equalizer or compressor/limiter). It provides a fully balanced signal that is the same level as the 1/4" TRS main out jacks [10] next door (except the 1/4" jacks are unaffected by the main output level switch [9]). 9. MAIN OUTPUT LEVEL When this switch is out (+4 dB), the XLR main outputs [8] provide a "+4 dBu" line-level signal. You can then connect these outputs to the line-level inputs of power amplifiers, powered loudspeakers, or serial processors. 11. MONO OUT This 1/4" TRS output connector provides a balanced or unbalanced line-level signal that is a combination of the left and right main out [10] signals (L+R). You may use this for a separate mix that does not require a stereo feed, or to simply test the monaural compatibility of the stereo mix. 12. MONO OUT LEVEL Control This is a separate level control for the mono out [11]. It comes after the main mix fader [73] but before the main output level switch [9], so turning the main mix fader up and down does affect the mono out signal. With this control turned all the way up, you will have 6 dB of extra gain at the mono out. 13. MAIN INSERTS These 1/4" TRS jacks are for connecting serial effects such as compressors, equalizers, deessers, or filters. The insert point is after the mix amps, but before the main mix fader [73]. Refer to the description of the channel insert on page 11 to see how to make this connection. 14. TAPE INPUTS These stereo unbalanced RCA inputs allow you to play a tape, CD player, iPod® dock, or other line-level source. The tape in jacks accept an unbalanced signal using standard hi-fi hookup cables. When the switch is pushed in (mic), the XLR main outputs are attenuated to microphone level. You can then connect these outputs safely to the microphone inputs of another mixer, providing a submix for keyboards or drums, for example, in a live sound application. The main outputs can then be plugged directly into a stage snake, and appear back at the front of house console like any other microphone level source. When mic is engaged, you can safely plug the XLR main output into a mixer's microphone input, even if it provides 48V phantom power. The switch is recessed to reduce the chance of accidently turning it on or off when plugging things in. Push in the tape button [45] to route the tape input to the control room and phones outputs [16, 42]. This allows you to play back recordings of your mixes. Push in the assign to main mix button [46] to route the tape input to the main outs [8, 10]. This allows you to play back music between sets over the main PA speakers. Pushing tape in the source matrix and pushing assign to main mix can create a feedback path between tape in and tape out. Make sure your tape deck is not in record, record pause, or input monitor mode when you engage these switches, or make sure the control room level control is turned all the way down first. 10. LEFT/RIGHT 1/4" MAIN OUTPUTS These 1/4" TRS output connectors provide balanced or unbalanced line-level signals. This is the same signal that appears at the XLR main outputs [8] (except the 1/4" jacks are unaffected by the main output level switch [9]). Connect these to the next device in the signal chain like an external processor (graphic equalizer or compressor/limiter), or directly to the inputs of the main amplifier. 12 Onyx 1640i 15. TAPE OUTPUTS These stereo unbalanced RCA outputs allow you to record the main stereo mix onto a tape deck, hard disk recorder, or automatic CD burner, for example. This lets you make a recording for posterity/archive/legal purposes whenever the band gets back together again. The tape output is the stereo main mix, and it is affected by the main mix level control [73]. The output could also be used as an extra set of main outputs for feeding another zone.