Bob Cordell is an electrical engineer who has been deeply involved in audio for over four decades. He began his career at Bell Laboratories where he designed integrated circuits and fiber optic communications systems. Bob is a prolific designer of amplifiers, audio test equipment, loudspeakers and other audio gear. He was the first to publish and demonstrate a power amplifier design combining vertical power MOSFETs with error correction, achieving unprecedented distortion levels of less than 0.001% at 20 kHz in 1983. He has published articles on power amplifier design in the popular press and in the Journal of the Audio Engineering Society. Bob is a member of the JAES Review Board and he maintains an audiophile website at www.cordellaudio.com.