A student of mine recently tagged me in a short article interviewing Patty LuPone (a broadway icon - if you don't know her YOU SHOULD! Check her out here). In this article, Ms. LuPone talked about how singers don’t know how to fill the house anymore and are relying on their mic's too much (as well as a few other things).
My student was wondering what I thought about this... so I'm going to tell you...
But before I do, I'd like to preface by saying I'm looking at this purely from a vocal & physical health perspective. I know VERY WELL that some of what I'm going to say is unrealistic for some productions. Especially in smaller theaters and communities where training and talent is somewhat limited. So please know that my intention is to inform about what the IDEAL should be when it comes to a life in theater.
YES - YOU SHOULD RELY ON YOUR MICS!
Frankly, if you are a big house who has a wonky sound system and you're expecting your performers to fill the space while belting or mixing, you're just asking your performers to hurt themselves. No amount of "breath support" or "putting it in the mask" will help them because, at a basic level, you're not dealing with anatomy at that point - you are dealing with the laws of acoustics. If you're interested in learning more about this I'd be happy to answer further questions, but I'm keeping it short here because there's quite a few pieces to the acoustics puzzle to understand overall. Suffice to say - belting/mixing as an actual viable way of singing and mics came into popularity around the same time because it was the first time you COULD make that sound in a functional and sustainable way without blowing your voice out constantly.
Looking at a slightly different realm, opera singers sing the way that they do because their art form is generally not sung on mic. And their voices STILL need to be able to carry not only in a big house but also over an entire orchestra. So they tend to be incredibly technically proficient singers (which is where the idea that being "classically trained" is better than not... which is questionable as well considering some teachers out there...). They also tend to have way too much push, but that has to do with the aesthetic of our current times rather than that being a useful part of their technique.
Write something about yourself. No need to be fancy, just an overview.