Mackie 1202-VLZ4 Owners Manual - Page 11

Owner's Manual 13 14 15 16 17 12. Headphones Out This stereo jack will drive any standard headphone to very loud levels. To learn how signals are routed to these outputs, see source matrix [33] on page 16. If you're wiring your own cable for the phones output, follow ­standard conventions: Tip = Left channel Ring = Right channel Sleeve = Common ground These balanced outputs ­are capable of delivering 22 dBu into a 600 ohm balanced or unbalanced load. 16. Alt 3-4 Outs These 1⁄4" outputs are the sum of any channels that have the mute/alt 3-4 [25] switch pressed in (see page 13 for the tender details). These balanced outputs are capable of delivering 22 dBu into a balanced or unbalanced load. WARNING: When we say the headphone amp is loud, we're not kidding. It can cause permanent ear damage. Even intermediate levels may be painfully loud with some earphones. BE CAREFUL! Always turn the ctl room/ submix [34] knob all the way down before connecting headphones. Keep it down until you've put the phones on. Then turn it up slowly. Why? "Engineers who fry their ears find themselves with short careers." 13. XLR Main Outs Use these to send the main mix out into the line-level balanced inputs of your amplifier or powered speakers. These low-impedance outputs are fully balanced and capable of driving +4 dBu lines with up to 28 dB of headroom. This output is 6 dB hotter than other outputs. 14. XLR Main Out Level Switch Engaging this switch reduces the level of the balanced XLR main outputs by 40 dB, so you can feed the m­ icrophone input of, say, ­another mixer. (You can safely connect the XLR outputs into an input that provides 48V phantom power.) 17. Channel Insert (Channels 1-4) These rear-panel jacks are where you connect serial effects such as compressors, equalizers, de-essers, or filters. Since most people don't have more than a few of these ­gadgets, we've included inserts for just the first four channels. If you want to use this kind of processing on channels 5 through 12, simply patch through the ­processor before you plug into the 1202VLZ4. The channel insert points are after the gain [4] and low cut [3] controls, but before the channel's EQ [27] and level [23] controls. The send (tip) is low-impedance (120 ohms), capable of driving any line-level device. The return (ring) is high-impedance (over 2.5 k ohms) and can be driven by almost any device. ring tip sleeve (TRS plug) SEND to processor tip This plug connects to one of the mixer's Channel Insert jacks. ring RETURN from processor See Appendix B for details and drawings about insert cables, and a diagram showing three ways to use the jacks. 15. Control Room Outs These 1⁄4" outputs are provided so you can listen to something other than the main mix. The source is selected using the source matrix [33] switches (see page 16). You can choose to listen to the main mix, the alt 3-4 stereo bus (see mute/alt 3-4 on page 13), soloed channels, or the tape input. The volume is adjustable with the control room/submix [34]knob. Besides being used for inserting external devices, these jacks can also be used as channel direct outputs; post-gain, post-low cut, and pre EQ. In fact, our Onyx mic preamps have become so famous, that people buy these mixers just to have four of these in their arsenal. Owner's Manual 11