I wish people would stop blindly accepting manufacturer specs as truth. Ref 3A is a perfect example, they don't go near as low as claimed, and aren't nearly as sensitive as claimed.
http://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1150:nrc-measurements-reference-3a-mm-de-capo-be&catid=77:loudspeaker-measurements&Itemid=153
http://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1150:nrc-measurements-reference-3a-mm-de-capo-be&catid=77:loudspeaker-measurements&Itemid=153