Despite its pedigree and retro looks, the FRV-1 can still belt out tube-driven reverb effects and hold out on the road as a stomp-box style compact pedal, thanks to its metal construction. Three controls for Dwell, Tone, and Mix lead to infinite possibilities in sound, from warm and soothing to cold and crisp with, of course, a recreation of the classic sound of '63 Fender Reverb via COSM technology.