Mackie ProFX30v2 Owners Manual - Page 10
Stereo Line Inputs, Insert
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ProFX8v2 • ProFX12v2 • ProFX16v2 • ProFX22v2 • ProFX30v2 TRS jacks and plugs are used for balanced signals and stereo headphones and are wired as follows according to standards specified by the AES (Audio Engineering Society): 1/4" TRS Balanced Mono Wiring: Sleeve = Shield (ground) Tip = Positive (+ or hot) Ring = Negative (- or cold) RING SLEEVE SLEEVE RING TIP TIP RING TIP SLEEVE To connect an unbalanced line to this input, use a 1⁄4" mono (TS) phone plug or instrument cable. They are wired as follows, according to standards specified by the AES (Audio Engineering Society): 1/4" TS Unbalanced Mono Wiring: Sleeve = Shield (ground) Tip = Positive (+ or hot) SLEEVE TIP SLEEVE TIP TIP SLEEVE 9. Insert These unbalanced 1/4" jacks are for connecting serial effects processors such as compressors, equalizers, de-essers, or filters. The insert point is after the gain control and low cut filter, but before the channel's EQ and level. The channel signal can go out of the insert jack to an external device, be processed and come back in on the same insert jack. To do this requires a standard insert cable that must be wired thusly: Tip = send (output to effects device) Ring = return (input from effects device) Sleeve = common ground 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 Insert jacks may be used as channel direct outputs; post-gain, and pre-EQ. If you insert a TS (mono) 1⁄4" plug only partially (to the first click) into an insert jack, the plug will not activate the jack switch and will not open the insert loop in the c ircuit (thereby allowing the channel signal to continue on its merry way through the mixer). The channel 1 line-level input on the ProFX8v2 and ProFX12v2 may also accept instrument-level signals if the hi-z switch is engaged. This allows you to connect guitars directly into channel 1 without the need for a DI box. 8. Stereo Line Inputs The stereo line inputs are designed for 1/4" TRS balanced or 1/4" TS unbalanced signals. They may accept any line-level instrument, effects device, CD player, etc. 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 illustration below. Do not overload or short-circuit the signal you are tapping from the mixer. That will affect the internal signal. Level control is available -20 dB to +20 dB. If you are connecting a mono source, use the left (mono) input, and the mono signals will appear on both sides of the main mix. The first two stereo channels of each ProFXv2 Series mixer are hybrid channels, each with a mic input XLR jack and low cut switch. Here the gain control only affects the mic input. Hybrid Channels: • ProFX8v2 - Channels 3/4 and 5/6 • ProFX12v2 - Channels 5/6 and 7/8 • ProFX16v2 - Channels 9/10 and 11/12 • ProFX22v2 - Channels 15/16 and 17/18 • ProFX30v2 - Channels 23/24 and 25/26 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.) 10 ProFX8v2 • ProFX12v2 • ProFX16v2 • ProFX22v2 • ProFX30v2