The 15Bs are capable of an 80Hz crossover, the Millenia 20s will require a 120Hz crossover. I prefer the 15Bs for surrounds, if at all possible.Needed a little help to choose one of these 2 options. Which would be best for side and rear surround for a 7.2.4.
My system so far consists L/R 95f/ CC 55c / 90C, 4 in Ceiling CI Pro 80R and soon 2 subs ( still searching for subs most likely either SVS or Rythmik).
Options 1 Use the Millenia 20 for sides and surrounds and put the tweeter 1 feet above the head.
Option 2 Use Paradigm 15B book shelves for the rears and Millenia 20 for the sides.
All placed with the tweeter about 1 feet above the head to have space between them and the ceiling speakers.
For 2 years I do not have to think about speakers , till the next upgrade. They will be powered by either the Anthem MCA 525 or the Parasound. Room is 15 by 21 , ceiling height is 9.