In the late 1970s one of the hearing aid industry's well known engineers, Mead Killion, Ph.D., started on a quest for a high fidelity hearing aid that would have a full 50-16,000 Hz bandwidth, low distortion and low battery drain. His background in designing high fidelity microphones used in recording and broadcast studios preceded his 1979 doctoral dissertation on high fidelity hearing aids. The first K-AMP hearing aids were commercially available 10 years later. Killion's passion for music dictated one of the design requirements for the K-AMP: It should not audibly distort during live performance. K-AMP hearing aids continue to maintain a solid share of all hearing aids distributed worldwide. The reason? They work.