"profound voice" is correct and usable in written English.
You can use it to describe a person's voice that is low or deep, or to refer to someone's words that are especially meaningful or important. For example, "The minister spoke in a profound voice, addressing the issues that are so important to us all."
"Eleanor Roosevelt is a loud and profound voice for people who want to change the world".
He has a deep and profound voice – ideal, I imagine, for making himself heard by an audience, even from 50ft up, but kind of intense.
Hope Boykin presented a buoyant Odetta in her physical incarnation as the activist/singer setting her profound voice to motion.
Ohio's Afghan Whigs may have had the sound and look as those other bands, but they had something different, that something was their singer Greg Dulli's dark lyrics and profound voice.
The Colombian newcomer, who also performed on the telecast, has a profound, moody voice that goes beyond the pretty-boy pop that is often a favorite of the Latin Grammys.
Some of what they say is much more profound than my voice over.
That did not stop him voicing "profound concerns" and lecturing Mr Mittal about his takeover etiquette.
"Wilfred Owen was one of the most profound and distinct voices of the first world war.
The UNHCR has voiced "profound concern" at the treatment of those on board and those on a separate boat carrying 41 asylum seekers from Sri Lanka who were subsequently handed over the Sri Lankan navy in an unprecedented on-sea transfer.
In an intriguing way, he expressed faith in that hero of our times, the detective or investigator, the epitome of empiricism's take on the truth - even as bewildered Litvinenko commentators voiced profound doubt we would ever know who had the former FSB lieutenant colonel assassinated.
Adam Schiff, the top Democrat on the committee, voiced "profound concerns" about the integrity of the investigation after Republican Chair Devin Nunes canceled a hearing scheduled for Tuesday where former Acting Attorney General Sally Yates — whom Trump fired in late January — and former CIA Director John Brennan would testify.
