Without a meter you can only guess what is coming into the house.
Lets say +12db give or take 2db
Loss of RG6quad per 100' -6.5db @ 1GHZ , 100' RG11 -5db @ 1GHZ
2Way splitter -3.5db
Just add it up (+12db)-(-3.5db)-(-5db)= +3.5
I think you need somewhere between -5db & +5db at the outlet.
I you...