So too put this in action steps,
Watch the video that was posted.
Order one or two of those inexpensive wireless from Amazon and order a nice cable to compare against. I would recommend the ammoon 5.8 ghz as there will be some slight to big tone suck amount inexpensive units. The ammoon was where I found it adequate fidelity and it was only 40 bucks.
Try them out on your own. Make sure to record your results and A/B them blind to make sure you’re not fooling yourself
Send back the inexpensive wireless if it does meet meet your Fidelity or other standards.
You’re out nothing but a bit of time and you’ll have a final answer for yourself. Because this is really subjective it’s going to be the best way to do it in they won’t cost you any money. That’s a nice thing about Amazon. You can try this out for yourself and some people will find there is a significant fidelity difference to them and others like myself find there’s not enough to justify a lot more money for a higher grade wireless. I don’t see enough difference to go real expensive with the wireless on our gigs. YMMV of course.