It's a 5.1, they will be the surrounds. The fronts go down below 60hz and I also have a sub.
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For dipole of bipole, it's best to have them mounted against since these speakers rely on walls and ceilings to reflect the sound around the room. If these are going to be free-standing, I would try and get the Mirage Omnipolar speakers. I wouldn't worry about the 110 hz cut-off for surrounds.