"Richard Crowley" wrote in message
...
CU's measurement of 4 ohms sounds like the minimum impedance
at some (unspecified) frequency. This seems normal to me. Look
at any impedance curve and you can see that the variation between
minimum and maximum impedance can sometimes be 2x or even 4x.

Or 10x!.

The fact that CU is reporting the minimum impedance (without any
apparent explanation or context) is just indicative of their questionable
understanding, judgement, and reliability in technical areas.

Very true.

No offense, but the notion that "measurements are measurements
not opinions" is not a safe world-view to subscribe to.

It's quite correct. It's when you are basing an opinion on questionable
measurements that problems arise.
Only when you know exactly what is being measured, and the uncertainty of
those measurements, is it is possible to arrive at a valid conclusion.

ALWAYS
question how the measurements were made and what is the hidden
agenda of the person reporting them. In CU's case, reporting 4 ohms
for nominally-rated 8 ohm speakers makes them look like consumer
champions giving you valuable information worth paying for.

Well spotted.:-)

TonyP.