Setting the crossover frequency is definitely a little black magic. If you look in the manual for the ICBM it recommends that you take the +/- 3dB rated frequency range add 10HZ to the low end and set the crossover there or higher. (At least I think that I remember reading it in there.)
For example I have a pair of speakers rated at 45Hz- (whatever) +/- 3dB. According to the logic above I should set the crossover at 55Hz or higher.
Good Luck.
Charlie
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Charlie,
Outlaw 970, B&K AV5000, Paradigm Ref 20 and CC (V1), Martin Logan Dynamo, Sony 42" RPTV, Toshiba HD-A1