Mackie Onyx 1220 Owner's Manual - Page 19

Owner's Manual Rear Panel There are just a few more connectors and switches to talk about and you'll have completed your tour of the Onyx 1220. Hang in there! 43. POWER Switch This one is self-explanatory. When the POWER switch is turned ON, power is supplied to the Onyx 1220 and the POWER LED on the front panel lights up. 44. Power Receptacle 47. MAIN OUTPUT LEVEL When this switch is out (+4 dB), the XLR MAIN OUTPUTS provide a +4 dBu line-level signal. When the switch is pushed in (MIC), the signal is attenuated by 40 dB to a microphone level. You can connect the XLR MAIN OUTPUTS to the microphone inputs of another mixer, providing a submix for keyboards or drums, for example, in a live sound application. Note: You can safely plug this output into a microphone input that provides 48 V phantom power. This is a standard 3-prong IEC power connector. Connect the detachable linecord (included in the box with your Onyx 1220) to the power receptacle, and plug the other end of the linecord into an AC outlet. The Onyx 1220 has a universal power supply that can accept any AC voltage ranging from 100 VAC to 240 VAC. No need for voltage select switches. It will work virtually anywhere in the world. That's why we call it a "Planet-Earth" power supply! This also means that it is less susceptible to voltage sags or spikes, providing greater electromagnetic isolation and better protection against AC line noise. 48. CONTROL RM Outputs These 1/4" TRS jacks provide a balanced line-level signal that can be used to provide another main mix output (with MAIN MIX selected in the CONTROL ROOM/PHONES SOURCE) (20), or to monitor the ALT 3-4 outputs, TAPE inputs, or a 2-track feed from your computer (with the optional FireWire card installed). Connect these outputs to the inputs of an amplifier, powered speaker, or recording device. 45. TALKBACK MIC 49. ALT 3-4 OUT 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 can use dynamic or condenser microphones. Note: Almost all dynamic microphones can be used with phantom power, but you might want to check the documentation that came with your microphone to be sure. These 1/4" TRS jacks provide a balanced line-level signal that can provide an alternate stereo mix for recording or subgrouping. Connect these outputs to the inputs of an amplifier, powered speaker, or recording device. Note: The ALT 3-4 OUT doesn't have a master level control. All the channels assigned to the ALT 3-4 bus are summed together (post-fader and pan) and sent directly to the ALT 3-4 OUT. 46. RIGHT/LEFT MAIN OUTPUTS These male XLR connectors provide a balanced linelevel signal that represent 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 6 dB higher than the 1/4" TRS MAIN OUT jacks on the front panel. 50. CHANNEL INSERT These 1/4" TRS jacks provide a send and return point for channels 1-4. Use the CHANNEL INSERT jacks to connect serial effects devices such as compressors, equalizers, de-essers, or filters to each individual channel. The INSERT points are after the GAIN and Low Cut controls, but before the EQ and Fader controls. The send (tip) is low-impedance, capable of driving any device. The return (ring) is high-impedance and can be driven by almost any device. POWER ON ~100-240VAC 50-60Hz 40W TALKBACK MIC +48V RIGHT BALANCED LEFT BALANCED +4 MIC MAIN OUTPUT LEVEL CONTROL RM BAL/UNBAL R L ALT 3-4 OUT BAL/UNBAL R/4 L/3 CHANNEL INSERT ( PRE-FADER / PRE EQ TIP SEND / RING RETURN ) 4 3 2 1 Owner's Manual 19