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<blockquote data-quote="n2audio" data-source="post: 3706590" data-attributes="member: 540940">NOMINAL impedence is just that.&nbsp; Since the ACTUAL impedance of a speaker varies with frequency mfg&#039;s try to specify an impedance that will represent what an amp will actually see averaged throughout the speakers usable frequency range.I&#039;ve never seen a speaker with an at rest DC resistance that equals its nominal impedance, and there&#039;s no reason they should be equal, but they&#039;re generally pretty close.That being said - I&#039;m sure the L7&#039;s in question are DVC&#039;s.&nbsp; The question is by 4 ohms do you mean they&#039;re dvc 4&#039;s, or dvc 2&#039;s (which are 4 ohms with coils in series).It stands to reason they are dvc 2&#039;s only because I wouldn&#039;t expect a pair of dvc&#039;s wired for 1 ohm to have a DCR of 1.8, that sounds more like a pair of dvc 2&#039;s wired for 2.at this point...who knows?</blockquote>

[QUOTE="n2audio, post: 3706590, member: 540940"] NOMINAL impedence is just that. Since the ACTUAL impedance of a speaker varies with frequency mfg's try to specify an impedance that will represent what an amp will actually see averaged throughout the speakers usable frequency range. I've never seen a speaker with an at rest DC resistance that equals its nominal impedance, and there's no reason they should be equal, but they're generally pretty close. That being said - I'm sure the L7's in question are DVC's. The question is by 4 ohms do you mean they're dvc 4's, or dvc 2's (which are 4 ohms with coils in series). It stands to reason they are dvc 2's only because I wouldn't expect a pair of dvc's wired for 1 ohm to have a DCR of 1.8, that sounds more like a pair of dvc 2's wired for 2. at this point...who knows? [/QUOTE]

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