georgehifi has been pushing the EPDR "number" for certain speakers as a reason why Class-D will not work unless it can drive <2 ohms, as they have an EPDR (Equivalent Peak Dissipation Resistance) < 1 ohm.
EPDR is a term that was developed to represent the peak power dissipation in output devices of linear amplifiers with reactive loads. It does not represent higher peak current or lower impedance, it represents higher power dissipation on the output devices that are operating in the linear region.
As Class-D devices do not operate in the linear region, EPDR is not a useful criteria for them.
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