That was my conclusion too. Driver mass, suspension compliance and BL are all tunable parameters that can be used along with rear chamber, front chamber and flare to set a horn for its intended application.There was some debate about this earlier with Danley championing Leach math and woofers with relatively heavy cones and Edgar prefering Keele math and woofers with lighter cones and stiffer suspensions. I tended to see their arguments as flip sides of the same coin but the debate was on, nonetheless. Seems to have been clarified to everyone's satisfaction now.