Vandersteen 2Ce and bass performance

I recently bought a 7-month old pair of Vandersteen 2Ce speakers and stands. I am running them with an Adcom 545 MKII and GFP555 Pre Amp. They are biwired with Monster M1.4s bi-wire. The room is large and hard (windows, maple floors, drywall, and brick). I'm hard up for more bass. I'm particularly concerened with the fact that so much of the musical stage is convincing and yet the kick drum in so much of my music sounds reticent. The speakers are reputed for "excellent bass extension," and I do not remember this reticence when auditioning other 2Ces in a local dealer. Suggestions for how to evaluate or improve this situation?? Any help is appreciated.