*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Bob Heil holds a microphone used by Roger Daltrey of The Who that is part of the Heil Sound exhibit opening at the Rock & Roll ...

A groundbreaking audio engineer, he provided the large-scale systems that brought tours by the Who and the Grateful Dead to life. By Alex Williams Bob Heil’s career as a groundbreaking sound engineer ...