Has deep voice always amazed you and have you always wanted to have a good deep voice ? . There are many voice artists who have deep voices, for eg: people on radio, voices that you hear in movie trailers, voice-over artists and public speakers all have very good professional voice which gets people glued to their talk or speech.
Finding the mix voice is the key to becoming a singer. Most singers who are popular may not know this term "mix" but if they sound powerful they are singing in their mix. Without finding your mix you will not be singing as powerful and will have difficultly in connecting higher notes.
Another video by Brett Manning on Finding your mix voice