KLQYS

Hi, Kind of a basic question, I was wondering if anyone has suggestions for some exercises where I can develop a stronger chest voice. I'm male and I'm most comfortable in a tenor/countertenor range. I can hit high notes easily, but others have said my lower range lacks strength and sounds a bit hollow/breathy like a yawn, almost like a bit of falsetto mixed in. I'm trying my best at breath control and making sure the voice is "pushed down" and coming from chest. I guess the perfect chest voice is one that sounds like you're giving an important speech? That's what I'm trying to achieve.