Metralla, Kinetic Wave footers work really well for me under Playback MPS-5. I prefer it over Rollerblock and Symposium Ultra platform. The background is blacker with Kinetic Wave. There is a bit more detail, a bit more focus with Symposium Ultra platform but I feel that the clarity comes with a slight trade off in hardening of midrange on voice and piano in comparison. I probably would not have notice the slight hardening of the midrange if I did not compare Symposium to Wave Kinetic though.