can you bi amp bx5 speakers

I have a quick question,are monitor audio bx5 floorstanding speakers bi ampable or not? and is it worth it,sound wise?
On the the back of them are four terminals ( an red and a black with 'lf' between them, and another red and black terninal above those with 'hf'between them) which sugests to my limited knowledge that i might be able to bi amp them.
My av receiver, marantz nr 1601,allows bi amping with bi ampable speakers.