You can often use TS cables on TRS connectors, but sometimes it causes, or just allows, noise to happen. Balanced is especially beneficial for long runs and low level (mic) signals. Basically, if using unbalanced doesn't cause noise, it's fine.
Technically, you could use TRS-TRS cables. The...
Yep. Note that the wall may be producing boundary effect, a low frequency boost caused by the speaker being close to a reflective surface. The switch on the back labeled "Room Compensation" counteracts the effect.
I see what might be a resonance around 265, but otherwise not much resonance. I think the cases where it transitions sharply from a downward slope to a horizontal ridge are more likely room noise. I suspect that the main thing that's happening is boundary effect, a boost in LF due to being...
Narrow down the time frame from 2 seconds (2001 ms) to about 200 ms. Most of what we're seeing in that graph is steady state noise in your room that has nothing to do with the output of your speakers.
On-third octave equalizers are very blunt instruments. You'd be better off with two or three bands of fully parametric eq than 30 bands of fixed-width, fixed-frequency filters. And eqs aren't really suited to fixing room issues. At best, they can mitigate some problems at one very precise...
What mic are you using?
The 50 Hz peak and the 68 Hz dip look like possible room effects.
The waterfall display might tell us more about what's happening. The frequency response alone lacks all time information.
Yep, wireless is cool until it isn't. If it breaks, that's potentially $1k or more. A cable is $20-40, and that's if you can't just solder it back together.
Whose or who's?
I find the ReaFIR in compressor mode to be a pretty effective de-esser. The spectrum analyzer helps pinpoint the offending frequencies.