Original Singer of the OT Theme
 

I might be alone in this, but I had no idea that the voice behind the OT theme song was not one of the VAs for the show, but a recording artist named Jim Mandell.

Meet The Original Singer of the ‘Teenage Mutant Ninja Turtles’ Theme Song!

You can see more of his work here: http://milesdoppler.com/

Nice!
 

Nice, but why is he so unknown!

The voice from behind the curtain, kind of like Greg Martin the artist of the VHS and video game covers. The stage name Miles Doppler, I knew I heard that somewhere before. It was just him, there were no backups?

Dunno, but considering hiring more than one person to sing would cost more money, I'd bet it's all just him.