KJT>         The difference between a 4 ohms and 8 ohms is the amount of
 KJT> resistance to current flow the speaker has.  The best way to see if 
 KJT> your speakers will work on your 6 ohm minimum outputs, is to test the
 KJT> speakers on an ohm meter or multi-meter for their true resistance.  
 KJT> Even though speakers are rated at a certain ohmage, the true 
 KJT> resistance can vary considerably.
 KJT>         I once had a pair of JBL speakers that were rated at 8 ohms, 
 KJT>         but when checked with an ohm-meter, the true resistance was 
 KJT>         found to be 5.6 ohms, which caused me to wonder why JBL would: 
 KJT>         1.) rate the speakers at 8 ohms instead of 4, and 2.) let them 
 KJT>         pass at all as 8 ohm.
 You will probably get many responses to this message.   The
 total resistance includes the voice coil wire plus impedance
 relating to capacitive and inductive reactance.   These result
 from the way voice coils, crossover components, and enclosure
 type  change reactive values based on frequency.   For example,
 the inductive impedance of the voice coil rises with frequency.
 Taking all of these sources of resistance into account produces
 the ohm value cited by a speaker manufacture.    Because of
 changes with frequency, a nominal(a form of an average value)
 resistance is chosen.  As a rule of thumb, the voice coil
 resistance plus 25% is a ballpark figure of the nominal value.
 But this means, of course, that at some frequencies the value is
 below or above this average.
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