Marakanetz: Dynamic speakers can offer various levels of capacitive or inductive reactance at various phase angles. E-stat's that are "direct drive" ( no transformer ) present a very high capacitive loads. I'm sure that there are other speakers that also offer less inductive loads.
As for the "frequency response" of various cables, Moncrieff went through and documented the results using various cables in IAR quite a long time ago. Due to the high levels of self-inductance, Monster cable aka "12 gauge zip cord" did not look pretty. The only cable that did worse was Fulton Gold, which is basically 4 gauge zip cord. It was linear up to about 125 Hz or so. After that, it rolled everything off due to the phenomenally high level of self-inductance. As such, it works GREAT as a subwoofer cable but sounds VERY "warm & dull" when used as a full range cable. It is for these reasons that so many of the "better" speaker cables strive for reduced inductance.
When it comes to speaker cables, the less inductance, the wider the bandwidth. This can be seen in the rise times of signals as measured at both the amp and at the speaker. High inductance cables will have a large overshoot on the leading edge of a high frequency square wave at the amp and will show a rounded corner at the speaker. Loading at both terminals becomes more linear as inductance is reduced but the amp may go into oscillation if capacitance becomes too high. As such, many manufacturers ( Nordost, XLO, etc... ) strive for a "reasonable" level of inductance with various levels of capacitance. Kimber's designs are less inductive and more capacitive, but not "crazy capacitive". Some other companies, primarily Goertz, Polk, Dunlavy, etc... threw caution to the wind and made very high capacitance cables. Their goals were to produce the widest bandwidth cables possible while delivering a very low nominal impedance. When using such designs, power transfer and loading characteristics are increased so long as the amp is stable. If the amp is not stable, one must take precautions i.e. use a zobel network either at the speaker or amplifier's output terminals. If one fails to do so with such a design, sonics will suffer and the amp may "smoke". Not a good thing, but some of my favorite amp / speaker cable combo's are of this very nature. Sean
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