Ok I know what group delay is, and have read that 25ms is bad, resulting in mud. But whats good, whats avarage... what about 22, 20, 18? and so on. And while im at it, i couldent find much on the "Phase Plot" in the WinISD help file or here on Talkbass. And Xmax... i read that 5.5mm is bare min for bass, but whats good? especially for a B-string. Thanks.