I have a 1680S. How do I hook up my in-ear monitor? I plan to run two house speakers but no floor monitors. Thanks,

Hook them up to the OUTPUTS

Good luck. Your mixer only has one aux out to supply only one stage monitor out. Only way to make it work would be to use the panning controls of each channel to different outputs to the Left and Right main outs for stage monitors and aux out as front of house speakers. I would get another separate mixer for monitor such as another efx 12 with every input connected to both mixers, then use the panning and main outputs to that. Sorry. Just not enough of mixer. You need an aux out for each individual's monitor.

Assuming you're trying to power the monitors from this unit as well as the mains.....Confirm that the amp switch is in the middle position which splits the internal amps....one for main and one for monitors. Output A would power the monitors.... B would power the mains.

Buy a powered stage monitor and gonnect to the MON jack. You will select the channels to go to the monitor with the AUX knobs and the overall level with the MON slider.

Use BALANCED lines to the powered monitor... This is a TRS plug at the mixer end for sure...

REMEMBER to power ALL interconnected equipment from the same receptaacle or source, even if it means running an extension from where your speakers are plugged in to the mixer !!! The ground bounce between power receptacles within a building can destroy your equipment's sensitive input circuits.

You haven't mentioned what model and manufacturer the mixer is. I will have to guess and say that the monitor out on the board isn't providing signal to the powered monitor or the monitor out on your board is powered and is now damaged by plugging a powered monitor into it. Carefully reread your manual and determine if the monitor out on your mixer is powered or line level. Reread also and make sure that the signal you are monitoring is assigned to monitor out, levelled correctly etc. If you find that the monitor out is passive (line level) try hooking it up to an external power amp and speaker. A guitar amp will do for testing purposes. Start with a low input volume on the amp. Also make sure that if it is passive to use a shielded cable from monitor out to input. If your board has powered monitor outs you can use a speaker cable from monitor out to speaker input (non powered monitor speaker).

try hooking headphones to the output and see if the crackling is still there.

then, try it with the speakers, at a lower computer voume level and higher speaker volume level. perhaps the headphone output is too loud and distorting in the speaker inputs.

Thought I answered this. Using balanced TRS cables, connect the powered speakers to the Main L and R 1/4 inch jacks on the top of the unit.

You will need at least a 24 channel mixer to give you spare channels. You also need an active crossover and a snake. The advice you need is too much to include here so I am including some links:http://mixonline.com/live/FixIts/, http://en.wikipedia.org/wiki/Live_sound_mixing, http://mixinglivesound.com/blog/tag/outdoor-concerts/,http://mixinglivesound.com/blog/, and http://www.scribd.com/doc/11435651/Beginners-Guide-to-Mixing-Sound. You may need more monitors than you are planning on and you might consider in ear monitoring.

Hi there. Search "top hat". There are 2 different depths. Compare measurements to space available in and on the enclosure where you plan to install it. (bottom)
Thanks
Paul

Are you sending the main mix to the monitors or are you giving them their own mix? What about using the sub groups, use 1 for your monitor send.