On Tuesday, February 12, 2013 12:31:27 AM UTC-8, N_Cook wrote:
Arfa Daily wrote in message

...

I have a current transformer on one leg of the input to my dummy load /
power meter. This allows me to monitor ...

I suspect a current transformer would affect any PA/speaker/Zobell
resonance/interaction effect.

A properly loaded currrent transformer can be ten millliohms, or a few
hundred microohms. There needn't be any significant effect on the system
being measured.