Stompbox Sonic - You never know what you'll see (or hear) at the @nesynthfest. Take this 1972 Maestro Rover rotating speaker that @tinymediaempire had on display. Last night was an epic finale
1971 Maestro Rover guitar amplifier with rotating speaker made by Gibson Illinios. - Guitarage.nl - Guitar Crazy, Crazy Guitars!
Gurus DOPPOLER (Rotating Speaker Simulation System) — Ferris Music
25 Most Valuable Effects | Vintage Guitar® magazine