Deepak, on keeping the sub "awake", it's helpful to set the sub output level(this isn't the main volume control) on the Denon higher so that it puts out more voltage into the sub amp. The level control on the sub itself would then be lowered a little to keep the same overall sub output level.
On the Denon's auto calibration, it sets the M60s "large" because they have enough bass capability to justify that setting, but since the EP350 does even better in that area, it's suggested that you manually set all the speakers "small" with an 80Hz crossover. Allow the sub to handle the lowest bass frequencies which it does best. Enjoy.
