6.5s vs subwoofer cancellation?

[akuma4u]

4 hours ago, White Lightning said:

I’ve personally never run a sub any higher than 70 htz at a 12 dB slope, which is where my Avalanche is set now. My 6.5” drivers in my doors are playing from 2600 htz down to 70 htz on a 12 dB slope. With the subs time aligned (4 ft), they blend really well together with no apparent frequencies missing. 

Guess my reason for posting this is I wonder why you’re capping your mid bass drivers so steep ??? 

my mids play from 83hz to 5000hz .. they dont dig too deep and when i have them playing into the 80 to 150hz range, the bass they create at that range sounds like its cancelling the sub bass that is created in that range.

I forgot to mention i am using an audiocontrol epicenter.