With the jl 500/1 you have a switch for off, 12db/24db. And the potentiometer goes from 40-200hz I believe. Turn it up to around 80hz or so, set the switch to 12db and see if some of the "high bass" comes back //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif