In preparing for Santa's delivery of a new surround sound receiver I've been reading the FAQs and basic HT primer. I note that the section on understanding Ohms says... "First of all, I hope you bought 8 ohm speakers. Especially if that is the only speaker on that channel. Remember that ohms fluctuate widely during playback. However, a good built in speaker crossover network will keep you safe. If you use 4 ohm speakers, which some receivers allow, fluctuating ohms could easily be below 4 and even 2 ohms during playback of a signal. These momentary deviations are not a problem if the receiver is built to handle this and your built in crossover network in the speaker cabinet is a quality product. PS// Faulty speaker crossovers have been known to fry amplifiers to a well done state" Well, the Infinity speakers I plan on using for my L and R fronts have the follwoing specs. Frequency Response: 47Hz - 25kHz Crossover Frequency(ies): 400Hz and 3.5kHz Sensitivity: 90dB (1 watt/1 meter) Nominal Impedance: 6 ohms Power Rating: 20 - 125 watts Woofer: 8" (20.3cm) IMG Midrange Driver: 5" (12.7cm) IMG Tweeter: 1" polycell Since it says "nominal impedance is 6 Ohms", that is NOT 8, is this a problem ?