There is what "should" happen and what really does. When I listen to music on my BC2 - BL3 - BL2 combination and the speakers are connected through my BV8 it sounds dull and much clarity is gone. When I connect them direct to the BC2 it matches the performance that I was used to when I ran my BS9000 with these speakers.
For your observation I would be interested what the entire setup is.
BS9000, BS2300, BC2, BL2500, BL3, Bl2, BS1, BV8, BC4, A8