I want to bi-amp my 4344s and have just purchased 2xBSS FDS360 active crossovers as a first step. It's amazing how cheap this old analogue pro gear has become- they cost about $300 US for the pair. Is anyone able to advise on crossover points and any other set-up info? I use a good tech but would like to be able to provide him with some clear guidelines on setting up the cards. 2x1200 hz cards were supplied and one each of 83 hz and 125 hz. As the xovers are usable as stereo 2 way, do I need only one? The other could then be set up for my 15" Tannoys. Thanks.