Congrats on the PAS.....
Im using EQ 05 on both channels L/R.....
it make a fuller sound for sure. Then you really got to EQ your entire setup....remember this is a different animal then the conventional systems...in your house is not a good test either the PAS needs some space to breath. I have no problms with the Low end sound at all...
what does yoru entire gear consist of at this time?