Pridden grew up only a few miles from the West London neighbourhoods in which Pete Townshend, Roger Daltrey and John Entwistle lived.
Pridden is commonly credited for having created on-stage "wedge" monitors in the late '60s; previously, onstage performers had no way to hear themselves singing, so during the 1968 American tour he began placing a speaker cabinet on its side in front of the band.
Since that time, onstage "wedge" monitors have become standard equipment at virtually every live performance of any scale worldwide.
[5] Pridden served as on stage sound engineer from the Who's 1969 tour onwards, and also for David Bowie and Paul McCartney at Live Aid in 1985.
Although over sixty years old, he continued to tour with the Who, mixing many of their later live CD/DVD releases, and in 2006 he co-produced Roger Daltrey's vocals on the Who's album Endless Wire.