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Message: <blockquote data-quote="hispls" data-source="post: 8724194" data-attributes="member: 614752">You can claim a number like that on paper but that won't figure in contact resistances (amp terminal to speaker cable, speaker cable to speaker terminal, speaker terminal to tinsel lead, lead to voice coil).  Sure, small, but your """500""" DF amp (at 4 ohm) is implying .008 ohm internal impedance.   So what are all those contact losses?  Even at .1 ohm you're DF is now about 25.   Now add DCR of your coil + contact losses and divide that by nominal impedance of your coil and that's your true damping factor real world.So basically real world your damping factor is typically somewhere around 1 and small change most of the time and the whole thing is pretty meaningless.    Or at least according to a guy that's been leading the industry in amplifier design for 40 years.</blockquote>

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