In the Rotel manual - available at their site - it states the sub has three modes: off, on, max that mean basicly no LFE/SUB, 'normal' LFE/SUB or double bass LFE/SUB, so all the basses (HEH) are covered.

The 1066 has IMO better bass management except (1) no analog filters on the 5.1 inputs and (2) no triple xover. I would use neither, but some setups might benefit.

Charlie