@keithandy ,What are your room dimensions? How far are the D48Rs from the front and side walls? I recently found that in my 19X15X8 room, if the ProAcs are 6 foot from back wall, and 42" from side walls, their bass was slightly lean than. So last week I moved them back about 10" (to back wall) and 3.5" to the side wall. Boom...the tight bass and weight magically appeared.
Can you try to experiment with the placement? Yes, it can take up to an hour to experiment, but it is worth the effort.