Hi Mooh,
Vocal mics are usually matched because the monitoring system is tuned using whatever mic the tech is suplying. If you do not have the luxury of seperate monitor mixes, then there is going to have to be some compromises made to deal with the response of the odd ball mic, or the odd ball simply won't get as much monitor as the rest of the 'matched' mics do. By matched, I simply mean the same type of mic, in this case a 58. The pickup pattern and the handling noise of a mic are also important factors to consider.
You probably won't know from gig to gig if the monitors are being mixed from FOH and if they are does the EQ on the rail affect the monitor send. If your mic sounds drastically differnt from all of the other mics, then it will probably end up being doctored on the strip and if the monitor send is post EQ, this can wreek havoc on the mix all night long as the FOH guy makes changes based on what he is hearing out front.
We don't match all mics (and I don't use 58s for guitars and drums), but gennerally if there are not individual monitor mixes using all of the same vocal mics, or at least mics with a similar frequency response is standard practice. You can get by with a different mic, but if you are dealing with different systems and different techs all the time it is to your advantage to use the standard 58.
If you are playing gigs with the same FOH tech all the time, then it shouldn't be an issue. Same goes for if you have your own PA or if you have seperate monitor mixes or a seperate monitor rig. The advantage to using the standard is that it keeps things simple, and it won't create problems for you.
I would suggest that if you sing, you should buy your own mic. I find very few sound company guys are cleaning their mics these days, so if it doesn't smell like listerine, it's probably full of snot.
Mooh said:
Hamm Guitars, you stated "if you are going to buy your own microphone and show up at a gig with it, it is in your best interest to have something that matches the other supplied mics".
I'm curious, why are matching mics in anyone's best interest? Hope I'm not missing anything here, but live and in the studio I've never noticed a requirement for matching mics. In fact I've always used what musicians and sound folks thought sounded best.
Peace, Mooh.