No magic, just lots of low end boost! It ranges from 1-24 dBs of boost or the manual says it lowers the Fs down as much as two octaves. My drivers have the same F3 and F6 as the 24 but until I get a proper mic for the low end again the 24 rolls off less to 10hz. I might order the minidsp nano and give it a try for the auto EQ with REW and my speakers! If it works I won't need the Bassis anymore but I do love it.