I'm going to be building a ported box and using WinISD.. i notice theirs an insane increase of about 9 db when tuning at 40-45hz (gets +9db in the 50 hz) compared to tuning at 30-35hz

I'm really not sure what these tunings (either 30-35 hz or 40-45Hz) sound like ....

I know tuning at the higher freq I will lose the balance of bass 25hz-80 hz .... but getting 9 more db is amazing.. I need the down the street bass cuz i'll be chilling at coffee shops and what not