A new Rev switch lets you choose between the two filter designers, either the 2140 or 2040 found in the original Rev1 and Rev2. The new Prophet 5 features all the P5 revisions (rev1, rev2, rev3) in one box with the help of the Curtis analog VCOs and filters (Rev3) as well as the new 2140 lowpass filters designed by Dave Rossum. The Sequential Prophet 5 polyphonic analog Synthesizer is back with all its charm and improved in many places. The legend is back, not from Behringer, but from his inventor. Sequential has reissued the legendary polyphonic analog Synthesizer Prophet-5 in a modern version with variable filter design, velocity/aftertouch keyboard and more.