"No tubes"

This ad from Guitar for the Practicing Musician November 1988 not only pushes Pearce Amplifier Systems, but it also promotes the joint North American Tour of Ronnie Montrose and Allan Holdsworth, as well as the pair’s latest Enigma Records albums, The Speed of Sound and Secrets, respectively. Cooperation is nice. I suspect the tour in question came no closer than about 350 miles to your truly, being squarely landlocked in Iowa in ’88. Anybody catch this?