The instruction manual of my ICMB recommends to add 10Hz to the +/- 3 DB point of the speaker. If you go by that try 50 Hz on the subs crossover. I have my 80s set to 60 Hz, there is no 50Hz setting on the ICMB or that would have been what I would have chosen.

Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud