Wowa Cwejman really outdid himself with the QMMF-4 (Quad Multi Mode Filter-Resonator). At 46HP, the QMMF-4 is one of the biggest euro modules available today, and at around $2,000, one of the most expensive. It's well worth the price of admission and the space in the rack, even when running something like a small 6U x 104HP system like those available from Elite, Ross Lamond Design, or Monorocket. I tote mine along all over the world and carry it on using a small flight case like that. Capable of running as an EQ, stereo or quad filter, five-channel mixer, or as the back end of up to four individual synth voices (just add sound sources and envelopes), this module has a lot of obvious applications. However, the real power comes from taking advantage of the thirty-eight patch points, which allow one to create absolutely unique patches.