Just bought a new set of RS5s.  So far quite happy w/ the sound.  But I'm curious: there are 2 inputs on each speaker (with a bridge), for bi-amping.  I'm not bi-amping at this point, so I wonder which input to use, the upper or the lower.  The manual says either is fine, and perhaps it makes no difference.  But some say it does make a difference, and some even say you could connect one wire to the upper and one to the lower input.  What do people think?

Thanks in advance.