At 14:41 03/15/99 -0600, John Payson wrote:
>BTW, in the case of loudspeakers, things actually get a bit more comp-
>licated; the impedance of a speaker varies with frequency.  One diff-
>erence between "tube" amplifiers and modern transistor designs is that
>tube amps often have a high impedance and will transfer more power to
>a HIGHER-impedance speaker, while modern amps have a low impedance des-
>ign and will transfer more power to a LOWER-impedance speaker.  Though
>I've not measured the specific behaviors, I would expect many loud-
>speakers would have very different frequency-response curves when driven
>by tube vs transistor amps.  Wonder why I seldom see mention of that?

don't the tube amps have usually output transformers, for a certain
loudspeaker impedance?

ge