Mackie ProFX22 Owner's Manual - Page 27

TRS Send/Receive Insert Jacks Mackie's single-jack inserts are the three-­conductor, TRS 1⁄4" phone type. They are unbalanced, but have both the mixer output (send) and the mixer input ­(return) signals in one connector. See Figure F. ring tip sleeve (TRS plug) SEND to processor "tip" This plug connects to one of the mixer's Channel Insert jacks. Figure F "ring" RETURN from processor The sleeve is the common ground (earth) for both signals. The send from the mixer to the e­ xternal unit is carried on the tip, and the return from the unit to the mixer is on the ring. Using the Send-only on an Insert Jack If you insert a TS (mono) 1⁄4" plug only p­ artially (to the first click) into a Mackie i­nsert jack, the plug will not activate the jack switch and will not open the insert loop in the ­circuit (thereby allowing the channel signal to continue on its merry way through the mixer). This allows you to tap out the channel signal without interrupting normal operation. If you push the 1⁄4" TS plug in to the second click, you will open the jack switch and create a d­ irect out, which does interrupt the signal in that channel. See Figure G. NOTE: Do not overload or short-circuit the signal you are tapping from the mixer. That will affect the internal signal. MONO PLUG Channel Insert jack Direct out with no signal interruption to master. Insert only to first "click." MONO PLUG Channel Insert jack Direct out with signal interruption to master. Insert all the way in to the second "click." STEREO PLUG Channel Insert jack For use as an effects loop. (TIP = SEND to effect, RING = RETURN from effect.) Figure G Owner's Manual 27