Warning: stereotypes ahead!
Enunciation is pretty important. As in, don't do it so much.

And pay attention to how men participate in conversations. Interruptions and silences (fewer noises to show they are listing, like "uh-huhs) are part of conversation domination-play for men,
especially with women. I still find myself interrupting and finishing sentences for women instead of letting them finish. I feel enough guilt on my own about it.
Simplicity is important to traditionally male speakers.
I'm trying to talk more "feminine," by listening and enunciating and opening up the conversations to tangents as opposed to really sounding it out and uping my own voice to sound in a certain range. It's easier for me, honestly, to play around that way. I'll tackle the sound when I want.
Of course, if you
just want to lower your voice . . . sorry I went off on my tangent. :-)