The Demeter RRP-1 Reverbulator guitar pedal. It is the only Real Spring Reverb manufactured in pedal form. Designed with the same revolutionary technology as the award winning RV-1 Real Spring Reverb, the RRP-1 can give you everything from subtle surf rock tones to full on ambient sound effects. More versatile than any onboard reverb, the RRP-1 takes spring reverb to a whole new level.