I've applied 6db baffle step to the input at 250Hz upwards on a 6db slope and got some improvement but still not what I want the sound to be !! I think the cone material is probably the most important issue and I recommend to anyone going for a project as important as a line array to buy the best Mid/Bass drivers and I presume that treated paper cones should be the choice , but meanwhile could I rectify some of the cone problems using some EQ ? If yes what are the frequencies that are typical to this particular driver and that could be rectified if someone has tested this Dayton RS 180?