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When it comes to audio “workarounds” there are always trade offs, but some are not necessarily THAT detrimental to the final input quality. The mantra is that the more adapters you implement, the more you stand a chance of inputting additional noise, interference, etc. While this is certainly true, it doesn’t HAVE to be.
Quality adapters and solid connections, good stress restraints (that bit of extra protection/support just behind the connector and onto the wire/cable) can make a difference. I often additionally support heavy adapter applications by using some gaffer’s tape to ad further stress relief at weak junctions when I am “adapting” in the field.
You lose the “balanced” audio if you go with the mini-stereo plug, but that doesn’t always guarantee BAD quality audio. In fact most of the time the audio quality is fine. Where the problem lies is in the quality of your wireless mic system. Some are more prone to interference, even having their signals blocked by the passing of a human body between your receiver and the source, overhead metal in roof structures, metal reinforced concrete pillars, etc.
So, your best bet is to first test your connections at the location(s) where you intend to operate and determine the situation there. Times also have an effect because traffic over the waves is greater at certain peak times than say, late evening (on average) or VERY early in the morning. Location in regards to heavy wave traffic – radio towers, broadcast station paths, emergency vehicle operations, airports, etc. – can be an issue.
That is why you need a stronger wireless mic system with a broader range of channels from which to work – a “true diversity” system that constantly scans for the best reception and can change signals from one to another in progress. The cheaper systems do not really provide for this level of reception, interference resistance or quality of signal feed.
When possible I actually PREFER to use a wired lapel mic system, running from the talent to my camcorder’s mini jack. This also has its trade offs, but not as many IMHO as an inexpensive wireless system. Mobility, of course, is an issue with a tethered mic-to-cam approach.