John Paul D'Arcy (December 28, 1957 – July 4, 1994) was an American electrical engineer and inventor closely associated with designing commercial subwoofers and lasers for Photorefractive keratectomy.
He worked at A Broun Sound in San Rafael, California, reconing loudspeakers for the Grateful Dead before taking a position at Miller & Kreisel Sound Corporation (M&K), where he worked from 1980 to 1984.
M&K Executive Vice President Charles Back called D'Arcy "the best digital engineer we ever worked with.".
[1] He subsequently worked for Spectra Physics Corporation in San Jose, California, designing lasers for supermarket scanners, and for VISX Corporation of San Jose where he developed lasers for optical surgery until his death.
In the early 1990s, he served as a guest lecturer at Stanford University's Center for Computer Research in Music and Acoustics.