I recently bought 3 new Infinity Primus 163's for my 3 fronts, and I just ordered 2 P143's for surrounds. My question is would I be better off setting receiver's crossover at 80 hz. or 100 hz? The speaker specs are listed below. The sub in this setup is an 8" Sony. My receiver only allows one crossover setting for all speakers. Thanks. P163 fronts - rated down to 49 hz. P143 surrounds - rated down to 100 hz. If I set crossover to 80 hz, the surrounds won't output between 80 and 100 hz. But this is minor, correct? If I set crossover to 100 hz. the fronts won't output between 49 hz. and 100 hz. This seems worse, doesn't it, since they're the 3 main speakers?