I just got a REL Strata III to complement my music only system comprising a full Musical Fidelity setup with the B&W CDM9NT speakers. does anyone know what the knobs Mode 1,2,3 & 4 does and how do i set it at a rolloff point at approx 32hz - 27hz to match the 9NTs? I have connected the sub using the High Level Neutrik Connection. what are your experiences (music/movies) with a Strata III sub good/bad?? any comments welcome. Thank you.