First off how I'm asking this question sounds really dumb.. lol

I have 4 6" seleniums (temporarily) hooked up to my headunit. They sound ok but they sound more like tweeters i guess lol
I hooked up two shitty 6x9's I found under my bed (I know 6x9's are a no-no for sq) with two of the seleniums and the vocals sound a lot better. A tad more bass but no actual bump.. im trying to find some speakers that will have a similar effect. I think i'm looking for midbass drivers.. are these used for higher frequency bass or do they play a part in vocals too?