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RE: I was using a different chart

Posted by Lew on June 7, 2012 at 14:55:45:
You wrote, "without it the transformer expresses its natural inclination to have a high impedance at the lower end of its range. It does this at a different range of frequencies than the bass transformer because its wound differently."

This is all true, but if you measure overall speaker impedance with both transformers hooked up and the parallel resistor and the series capacitor in front of the treble transformer and the series inductor in front of the bass transformer, the removal of the resistor (only) should not cause that peak, unless there is something else going on peculiar to the toroidal treble transformer. This is my point. How do you "wind" a transformer so it gives you a resonant peak at upper midrange frequencies? This is not something you do on purpose, I would think.