You can achieve this without a special mic if you want. It's just a bandpass effect if I remember correctly. Or just equalize your vocal so that everything is in the midrange and the lows and highs roll off dramatically - gives a real AM radio feel to it. I don't remember which mic he used...maybe a green bullet ?(usually used for harmonica) Can anyone confirm this? If I could see the mic I'd be able to tell you which one, otherwise their are a million small mics it could be - and don't forget, odds are it is EQ that may have created that effect...If you listen to Nickelback - Woke Up This Morning, Chad Kroeger uses a CB radio microphone to achieve sort of a muffled AM radio effect...works really well live too. Just an idea.

I use a bandpass filter in the studio, but I figured there might also be a mic for it, because I have seen the lead singer of the Toadies use a mic that sounds exactly the same and looks the same also. Therefore I figured there was probably a mic that catered to this type of effect.

Thanks for the idea on the green bullet.