Lotsa power. I have more than 2' behind mine and more than 3' to the side wall, toed in to slightly behind my listening position. I power mine with 4 channels (bi-amping) of a Sunfire 400 ~ seven. In that they are 4 ohm speakers that's 1600 Watts per speaker.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer