Check the listing for details. Behringer Spring Reverberation 646 Spring Reverb Module. Condition: New. Listed at 209.00 USD. A Legacy of Spring-powered Sonic Shaping Returns Behringer’s Spring Reverberation 636 module takes up the mantle of the legendary spring reverb unit of the mid-20th century that was used by the likes of Pete Townshend and reggae/dub maestro Lee “Scratch” Perry, and now, it’s reimagined in a portable, Eurorack-compatible form factor. Its bare-bones aesthetics stay faithful to its spiritual predecessor, concealing within it an all-analog architecture and dual-spring design to supplement your sound with iconic space-shaping spring reverbs meticulously re-created with exacting precision. Its versatile connectivity suite includes pairs of both balanced and unbalanced mic inputs as well as dedicated input duos for both high- and low-level auxiliary signals.