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RE: Questions about speaker cable characteristic impedance

Posted by Ralph (M) on October 4, 2023 at 09:40:34

In Reply to: Questions about speaker cable characteristic impedance posted by MP on October 2, 2023 at 11:56:15:

In a calculation like this the output impedance of the source really isn't relevant- its the impedance of the load. If it does not match the the CI of the cable, energy can be reflected.

At audio frequencies and speaker impedances, one would think this energy to be minimal (and not to be confused with back EMF). However, tests we did about 40 years ago (the 80s) seemed to suggest that the effect was more profound than we had imagined. But to be clear, these days I've been thinking that some variables were not controlled.

At any rate no speaker, in particular an ESL, has a flat impedance curve such that it would properly terminate a cable's CI at all frequencies.

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