Is problem speaker or amp?

I have B&W CDM 9NT's and a CDM CNT as my front 3 in a HT, driven by a Pioneer VSX 49tx. This receiver was considered equal of B&K307 back in 2002, and puts out 130wpcx7. My problem: I just don't get good output at low volume compared to my living room setup:B&W Marix 803s2 driven by Acurus DIA100 integrated/passive preamp(100wpcx2). Is it just that the speakers can't push as much air and I need to upgrade to used n803 or 803s? Would more juice from a more powerful amp help (if so, recommendations?)? Need your thoughts and ideas. Thanks much