High end audio 101: The leading and trailing edges of the notes come from top module. If you add a sub woofer to a high end monitor and you get them to blend well you have the same concept as with your VR 9.
Just because you have a powered bass section which is much less crucial to drive with a mega amp as it is just low bass info, you still need quality electronics to drive the top module where the quality of the amplifier will create the magic you are trying to achieve.