Zaikesman...
Erratic was a poor word choice - thank you for correcting me. I tend to use that word to describe impedance curves that are difficult to drive because more often than not the _are_ erratic in that they fluctuate like a roller coaster, but in the case of the Thiel's the problem is not with the variation.
The Thiel's impedance is consistently low, and relatively flat. It has a reasonably benign phase angle although once you get down to the range where the Thiel's impedance lies for the vast majority of the frequency range, even a slightly capacitant phase angle is going to complicate matters somewhat.
The point that I was trying to make was two fold: one the nominal impedance rating on the Thiel is virtually meaningless and certainly misleading. Second, because the impedance dips down so low, you really need a lot of current, and hence the bigger the amp the better. Err on the side of too much power.
Erratic was a poor word choice - thank you for correcting me. I tend to use that word to describe impedance curves that are difficult to drive because more often than not the _are_ erratic in that they fluctuate like a roller coaster, but in the case of the Thiel's the problem is not with the variation.
The Thiel's impedance is consistently low, and relatively flat. It has a reasonably benign phase angle although once you get down to the range where the Thiel's impedance lies for the vast majority of the frequency range, even a slightly capacitant phase angle is going to complicate matters somewhat.
The point that I was trying to make was two fold: one the nominal impedance rating on the Thiel is virtually meaningless and certainly misleading. Second, because the impedance dips down so low, you really need a lot of current, and hence the bigger the amp the better. Err on the side of too much power.