Finding (calculating?) speaker and amp impedance

I'm starting to understand why speakers with high efficiency and perhaps more importantly a flat impedance curve work well with tube amps.

If not published by the vendor/manufacturer, is there a way to determine the impedance curve from the specs that are provided?

Also, I have a pair of Magnepans that need high current amplification.

Is there a way to determine the current of an amplifier from vendor/manufacturer provided specs?

Thanks everyone!

hleeid01-06-2023 4:35am

hleeid OP Details Discussions Posts This discussion Message User 219 posts 01-06-2023 at 05:24pm Copy Comment URL Report Comment Edit Delete Wow! Lots to consider. I guess my real concern is knowing if my amps have "high enough" current for speakers that present a challenging load. Surprisingly (to me) was finding out that my old 80 db sensitive little monitors are known to be great with tube amps. These are Rogers LS3/5a from the early 70s. @erik_squires is there anything you know of that will measure speaker impedance across the frequency range?