The sub that I got with my Logitech Z-5500 computer speakers is indicated as a Long Throw sub. I have an idea of what this means (the obvious?), but how is it acheived? Due to the fact that I may have the dreaded LFE dead spot right in front of my listening area to deal with, the possibility of supplementing my HT setup with this speaker, that hopefully I can modify to allow line-level input, exists. The B & W sub is in the most practical spot in the room and moving it somewhere else isn't feasible.